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Merge branch 'akpm' (patches from Andrew)

Browse Source 
Merge even more updates from Andrew Morton:

 - a kernel-wide sweep of show_stack()

 - pagetable cleanups

 - abstract out accesses to mmap_sem - prep for mmap_sem scalability work

 - hch's user acess work

Subsystems affected by this patch series: debug, mm/pagemap, mm/maccess,
mm/documentation.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (93 commits)
  include/linux/cache.h: expand documentation over __read_mostly
  maccess: return -ERANGE when probe_kernel_read() fails
  x86: use non-set_fs based maccess routines
  maccess: allow architectures to provide kernel probing directly
  maccess: move user access routines together
  maccess: always use strict semantics for probe_kernel_read
  maccess: remove strncpy_from_unsafe
  tracing/kprobes: handle mixed kernel/userspace probes better
  bpf: rework the compat kernel probe handling
  bpf:bpf_seq_printf(): handle potentially unsafe format string better
  bpf: handle the compat string in bpf_trace_copy_string better
  bpf: factor out a bpf_trace_copy_string helper
  maccess: unify the probe kernel arch hooks
  maccess: remove probe_read_common and probe_write_common
  maccess: rename strnlen_unsafe_user to strnlen_user_nofault
  maccess: rename strncpy_from_unsafe_strict to strncpy_from_kernel_nofault
  maccess: rename strncpy_from_unsafe_user to strncpy_from_user_nofault
  maccess: update the top of file comment
  maccess: clarify kerneldoc comments
  maccess: remove duplicate kerneldoc comments
  ...
This commit is contained in:
Linus Torvalds 2020-06-09 09:54:46 -07:00
commit a5ad5742f6
941 changed files with 2631 additions and 3713 deletions
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10
Documentation/admin-guide/mm/numa_memory_policy.rst
View File

@ -364,19 +364,19 @@ follows:
2) for querying the policy, we do not need to take an extra reference on the
target task's task policy nor vma policies because we always acquire the
task's mm's mmap_sem for read during the query. The set_mempolicy() and
mbind() APIs [see below] always acquire the mmap_sem for write when
task's mm's mmap_lock for read during the query. The set_mempolicy() and
mbind() APIs [see below] always acquire the mmap_lock for write when
installing or replacing task or vma policies. Thus, there is no possibility
of a task or thread freeing a policy while another task or thread is
querying it.
3) Page allocation usage of task or vma policy occurs in the fault path where
we hold them mmap_sem for read. Again, because replacing the task or vma
policy requires that the mmap_sem be held for write, the policy can't be
we hold them mmap_lock for read. Again, because replacing the task or vma
policy requires that the mmap_lock be held for write, the policy can't be
freed out from under us while we're using it for page allocation.
4) Shared policies require special consideration. One task can replace a
shared memory policy while another task, with a distinct mmap_sem, is
shared memory policy while another task, with a distinct mmap_lock, is
querying or allocating a page based on the policy. To resolve this
potential race, the shared policy infrastructure adds an extra reference
to the shared policy during lookup while holding a spin lock on the shared

2
Documentation/admin-guide/mm/userfaultfd.rst
View File

@ -33,7 +33,7 @@ memory ranges) provides two primary functionalities:
The real advantage of userfaults if compared to regular virtual memory
management of mremap/mprotect is that the userfaults in all their
operations never involve heavyweight structures like vmas (in fact the
``userfaultfd`` runtime load never takes the mmap_sem for writing).
``userfaultfd`` runtime load never takes the mmap_lock for writing).
Vmas are not suitable for page- (or hugepage) granular fault tracking
when dealing with virtual address spaces that could span

2
Documentation/filesystems/locking.rst
View File

@ -615,7 +615,7 @@ prototypes::
locking rules:
============= ======== ===========================
ops mmap_sem PageLocked(page)
ops mmap_lock PageLocked(page)
============= ======== ===========================
open: yes
close: yes

6
Documentation/vm/hmm.rst
View File

@ -191,15 +191,15 @@ The usage pattern is::
again:
range.notifier_seq = mmu_interval_read_begin(&interval_sub);
down_read(&mm->mmap_sem);
mmap_read_lock(mm);
ret = hmm_range_fault(&range);
if (ret) {
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
if (ret == -EBUSY)
goto again;
return ret;
}
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
take_lock(driver->update);
if (mmu_interval_read_retry(&ni, range.notifier_seq) {

4
Documentation/vm/transhuge.rst
View File

@ -98,9 +98,9 @@ split_huge_page() or split_huge_pmd() has a cost.
To make pagetable walks huge pmd aware, all you need to do is to call
pmd_trans_huge() on the pmd returned by pmd_offset. You must hold the
mmap_sem in read (or write) mode to be sure a huge pmd cannot be
mmap_lock in read (or write) mode to be sure a huge pmd cannot be
created from under you by khugepaged (khugepaged collapse_huge_page
takes the mmap_sem in write mode in addition to the anon_vma lock). If
takes the mmap_lock in write mode in addition to the anon_vma lock). If
pmd_trans_huge returns false, you just fallback in the old code
paths. If instead pmd_trans_huge returns true, you have to take the
page table lock (pmd_lock()) and re-run pmd_trans_huge. Taking the

1
arch/alpha/boot/bootp.c
View File

@ -16,7 +16,6 @@
#include <asm/console.h>
#include <asm/hwrpb.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <stdarg.h>

1
arch/alpha/boot/bootpz.c
View File

@ -18,7 +18,6 @@
#include <asm/console.h>
#include <asm/hwrpb.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <stdarg.h>

1
arch/alpha/boot/main.c
View File

@ -14,7 +14,6 @@
#include <asm/console.h>
#include <asm/hwrpb.h>
#include <asm/pgtable.h>
#include <stdarg.h>

1
arch/alpha/include/asm/io.h
View File

@ -7,7 +7,6 @@
#include <linux/kernel.h>
#include <linux/mm.h>
#include <asm/compiler.h>
#include <asm/pgtable.h>
#include <asm/machvec.h>
#include <asm/hwrpb.h>

16
arch/alpha/include/asm/pgtable.h
View File

@ -276,15 +276,6 @@ extern inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) &= ~_PAGE_FOW; return
extern inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= __DIRTY_BITS; return pte; }
extern inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= __ACCESS_BITS; return pte; }
#define PAGE_DIR_OFFSET(tsk,address) pgd_offset((tsk),(address))
/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
/* to find an entry in a page-table-directory. */
#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
/*
* The smp_read_barrier_depends() in the following functions are required to
* order the load of *dir (the pointer in the top level page table) with any
@ -305,6 +296,7 @@ extern inline pmd_t * pmd_offset(pud_t * dir, unsigned long address)
smp_read_barrier_depends(); /* see above */
return ret;
}
#define pmd_offset pmd_offset
/* Find an entry in the third-level page table.. */
extern inline pte_t * pte_offset_kernel(pmd_t * dir, unsigned long address)
@ -314,9 +306,7 @@ extern inline pte_t * pte_offset_kernel(pmd_t * dir, unsigned long address)
smp_read_barrier_depends(); /* see above */
return ret;
}
#define pte_offset_map(dir,addr) pte_offset_kernel((dir),(addr))
#define pte_unmap(pte) do { } while (0)
#define pte_offset_kernel pte_offset_kernel
extern pgd_t swapper_pg_dir[1024];
@ -355,8 +345,6 @@ extern inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
extern void paging_init(void);
#include <asm-generic/pgtable.h>
/* We have our own get_unmapped_area to cope with ADDR_LIMIT_32BIT. */
#define HAVE_ARCH_UNMAPPED_AREA

1
arch/alpha/kernel/process.c
View File

@ -37,7 +37,6 @@
#include <asm/reg.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/hwrpb.h>
#include <asm/fpu.h>

2
arch/alpha/kernel/proto.h
View File

@ -2,8 +2,6 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <asm/pgtable.h>
/* Prototypes of functions used across modules here in this directory. */
#define vucp volatile unsigned char *

1
arch/alpha/kernel/ptrace.c
View File

@ -19,7 +19,6 @@
#include <linux/audit.h>
#include <linux/uaccess.h>
#include <asm/pgtable.h>
#include <asm/fpu.h>
#include "proto.h"

1
arch/alpha/kernel/setup.c
View File

@ -55,7 +55,6 @@ static struct notifier_block alpha_panic_block = {
};
#include <linux/uaccess.h>
#include <asm/pgtable.h>
#include <asm/hwrpb.h>
#include <asm/dma.h>
#include <asm/mmu_context.h>

1
arch/alpha/kernel/smp.c
View File

@ -36,7 +36,6 @@
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_alcor.c
View File

@ -23,7 +23,6 @@
#include <asm/dma.h>
#include <asm/mmu_context.h>
#include <asm/irq.h>
#include <asm/pgtable.h>
#include <asm/core_cia.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_cabriolet.c
View File

@ -23,7 +23,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_apecs.h>
#include <asm/core_cia.h>
#include <asm/core_lca.h>

1
arch/alpha/kernel/sys_dp264.c
View File

@ -26,7 +26,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_tsunami.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_eb64p.c
View File

@ -22,7 +22,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_apecs.h>
#include <asm/core_lca.h>
#include <asm/hwrpb.h>

1
arch/alpha/kernel/sys_eiger.c
View File

@ -23,7 +23,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_tsunami.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_jensen.c
View File

@ -25,7 +25,6 @@
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include "proto.h"

1
arch/alpha/kernel/sys_marvel.c
View File

@ -18,7 +18,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_marvel.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_miata.c
View File

@ -22,7 +22,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_cia.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_mikasa.c
View File

@ -23,7 +23,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_apecs.h>
#include <asm/core_cia.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_nautilus.c
View File

@ -40,7 +40,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_irongate.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_noritake.c
View File

@ -24,7 +24,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_apecs.h>
#include <asm/core_cia.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_rawhide.c
View File

@ -21,7 +21,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_mcpcia.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_ruffian.c
View File

@ -23,7 +23,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_cia.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_rx164.c
View File

@ -22,7 +22,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_polaris.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_sable.c
View File

@ -21,7 +21,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_t2.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_sio.c
View File

@ -25,7 +25,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_apecs.h>
#include <asm/core_lca.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_sx164.c
View File

@ -22,7 +22,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_cia.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_takara.c
View File

@ -21,7 +21,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_cia.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_titan.c
View File

@ -26,7 +26,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_titan.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>

1
arch/alpha/kernel/sys_wildfire.c
View File

@ -20,7 +20,6 @@
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_wildfire.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>

26
arch/alpha/kernel/traps.c
View File

@ -121,10 +121,10 @@ dik_show_code(unsigned int *pc)
}
static void
dik_show_trace(unsigned long *sp)
dik_show_trace(unsigned long *sp, const char *loglvl)
{
long i = 0;
printk("Trace:\n");
printk("%sTrace:\n", loglvl);
while (0x1ff8 & (unsigned long) sp) {
extern char _stext[], _etext[];
unsigned long tmp = *sp;
@ -133,24 +133,24 @@ dik_show_trace(unsigned long *sp)
continue;
if (tmp >= (unsigned long) &_etext)
continue;
printk("[<%lx>] %pSR\n", tmp, (void *)tmp);
printk("%s[<%lx>] %pSR\n", loglvl, tmp, (void *)tmp);
if (i > 40) {
printk(" ...");
printk("%s ...", loglvl);
break;
}
}
printk("\n");
printk("%s\n", loglvl);
}
static int kstack_depth_to_print = 24;
void show_stack(struct task_struct *task, unsigned long *sp)
void show_stack(struct task_struct *task, unsigned long *sp, const char *loglvl)
{
unsigned long *stack;
int i;
/*
* debugging aid: "show_stack(NULL);" prints the
* debugging aid: "show_stack(NULL, NULL, KERN_EMERG);" prints the
* back trace for this cpu.
*/
if(sp==NULL)
@ -163,14 +163,14 @@ void show_stack(struct task_struct *task, unsigned long *sp)
if ((i % 4) == 0) {
if (i)
pr_cont("\n");
printk(" ");
printk("%s ", loglvl);
} else {
pr_cont(" ");
}
pr_cont("%016lx", *stack++);
}
pr_cont("\n");
dik_show_trace(sp);
dik_show_trace(sp, loglvl);
}
void
@ -184,7 +184,7 @@ die_if_kernel(char * str, struct pt_regs *regs, long err, unsigned long *r9_15)
printk("%s(%d): %s %ld\n", current->comm, task_pid_nr(current), str, err);
dik_show_regs(regs, r9_15);
add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
dik_show_trace((unsigned long *)(regs+1));
dik_show_trace((unsigned long *)(regs+1), KERN_DEFAULT);
dik_show_code((unsigned int *)regs->pc);
if (test_and_set_thread_flag (TIF_DIE_IF_KERNEL)) {
@ -625,7 +625,7 @@ got_exception:
printk("gp = %016lx sp = %p\n", regs->gp, regs+1);
dik_show_code((unsigned int *)pc);
dik_show_trace((unsigned long *)(regs+1));
dik_show_trace((unsigned long *)(regs+1), KERN_DEFAULT);
if (test_and_set_thread_flag (TIF_DIE_IF_KERNEL)) {
printk("die_if_kernel recursion detected.\n");
@ -957,12 +957,12 @@ give_sigsegv:
si_code = SEGV_ACCERR;
else {
struct mm_struct *mm = current->mm;
down_read(&mm->mmap_sem);
mmap_read_lock(mm);
if (find_vma(mm, (unsigned long)va))
si_code = SEGV_ACCERR;
else
si_code = SEGV_MAPERR;
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
}
send_sig_fault(SIGSEGV, si_code, va, 0, current);
return;

12
arch/alpha/mm/fault.c
View File

@ -117,7 +117,7 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
if (user_mode(regs))
flags |= FAULT_FLAG_USER;
retry:
down_read(&mm->mmap_sem);
mmap_read_lock(mm);
vma = find_vma(mm, address);
if (!vma)
goto bad_area;
@ -171,7 +171,7 @@ retry:
if (fault & VM_FAULT_RETRY) {
flags |= FAULT_FLAG_TRIED;
/* No need to up_read(&mm->mmap_sem) as we would
/* No need to mmap_read_unlock(mm) as we would
* have already released it in __lock_page_or_retry
* in mm/filemap.c.
*/
@ -180,14 +180,14 @@ retry:
}
}
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
return;
/* Something tried to access memory that isn't in our memory map.
Fix it, but check if it's kernel or user first. */
bad_area:
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
if (user_mode(regs))
goto do_sigsegv;
@ -211,14 +211,14 @@ retry:
/* We ran out of memory, or some other thing happened to us that
made us unable to handle the page fault gracefully. */
out_of_memory:
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
if (!user_mode(regs))
goto no_context;
pagefault_out_of_memory();
return;
do_sigbus:
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
/* Send a sigbus, regardless of whether we were in kernel
or user mode. */
force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *) address, 0);

1
arch/alpha/mm/init.c
View File

@ -24,7 +24,6 @@
#include <linux/gfp.h>
#include <linux/uaccess.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/hwrpb.h>
#include <asm/dma.h>

3
arch/arc/include/asm/bug.h
View File

@ -13,7 +13,8 @@
struct task_struct;
void show_regs(struct pt_regs *regs);
void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs);
void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs,
const char *loglvl);
void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
unsigned long address);
void die(const char *str, struct pt_regs *regs, unsigned long address);

24
arch/arc/include/asm/pgtable.h
View File

@ -248,9 +248,6 @@
extern char empty_zero_page[PAGE_SIZE];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
#define pte_unmap(pte) do { } while (0)
#define pte_unmap_nested(pte) do { } while (0)
#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
@ -282,18 +279,6 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
/* Don't use virt_to_pfn for macros below: could cause truncations for PAE40*/
#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
/*
* pte_offset gets a @ptr to PMD entry (PGD in our 2-tier paging system)
* and returns ptr to PTE entry corresponding to @addr
*/
#define pte_offset(dir, addr) ((pte_t *)(pmd_page_vaddr(*dir)) +\
__pte_index(addr))
/* No mapping of Page Tables in high mem etc, so following same as above */
#define pte_offset_kernel(dir, addr) pte_offset(dir, addr)
#define pte_offset_map(dir, addr) pte_offset(dir, addr)
/* Zoo of pte_xxx function */
#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
@ -331,13 +316,6 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
set_pte(ptep, pteval);
}
/*
* All kernel related VM pages are in init's mm.
*/
#define pgd_offset_k(address) pgd_offset(&init_mm, address)
#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
#define pgd_offset(mm, addr) (((mm)->pgd)+pgd_index(addr))
/*
* Macro to quickly access the PGD entry, utlising the fact that some
* arch may cache the pointer to Page Directory of "current" task
@ -390,8 +368,6 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
#include <asm/hugepage.h>
#endif
#include <asm-generic/pgtable.h>
/* to cope with aliasing VIPT cache */
#define HAVE_ARCH_UNMAPPED_AREA

4
arch/arc/kernel/process.c
View File

@ -90,10 +90,10 @@ fault:
if (unlikely(ret != -EFAULT))
goto fail;
down_read(&current->mm->mmap_sem);
mmap_read_lock(current->mm);
ret = fixup_user_fault(current, current->mm, (unsigned long) uaddr,
FAULT_FLAG_WRITE, NULL);
up_read(&current->mm->mmap_sem);
mmap_read_unlock(current->mm);
if (likely(!ret))
goto again;

17
arch/arc/kernel/stacktrace.c
View File

@ -158,9 +158,11 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
/* Call-back which plugs into unwinding core to dump the stack in
* case of panic/OOPs/BUG etc
*/
static int __print_sym(unsigned int address, void *unused)
static int __print_sym(unsigned int address, void *arg)
{
printk(" %pS\n", (void *)address);
const char *loglvl = arg;
printk("%s %pS\n", loglvl, (void *)address);
return 0;
}
@ -217,17 +219,18 @@ static int __get_first_nonsched(unsigned int address, void *unused)
*-------------------------------------------------------------------------
*/
noinline void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs)
noinline void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs,
const char *loglvl)
{
pr_info("\nStack Trace:\n");
arc_unwind_core(tsk, regs, __print_sym, NULL);
printk("%s\nStack Trace:\n", loglvl);
arc_unwind_core(tsk, regs, __print_sym, (void *)loglvl);
}
EXPORT_SYMBOL(show_stacktrace);
/* Expected by sched Code */
void show_stack(struct task_struct *tsk, unsigned long *sp)
void show_stack(struct task_struct *tsk, unsigned long *sp, const char *loglvl)
{
show_stacktrace(tsk, NULL);
show_stacktrace(tsk, NULL, loglvl);
}
/* Another API expected by schedular, shows up in "ps" as Wait Channel

6
arch/arc/kernel/troubleshoot.c
View File

@ -89,7 +89,7 @@ static void show_faulting_vma(unsigned long address)
/* can't use print_vma_addr() yet as it doesn't check for
* non-inclusive vma
*/
down_read(&active_mm->mmap_sem);
mmap_read_lock(active_mm);
vma = find_vma(active_mm, address);
/* check against the find_vma( ) behaviour which returns the next VMA
@ -111,7 +111,7 @@ static void show_faulting_vma(unsigned long address)
} else
pr_info(" @No matching VMA found\n");
up_read(&active_mm->mmap_sem);
mmap_read_unlock(active_mm);
}
static void show_ecr_verbose(struct pt_regs *regs)
@ -240,5 +240,5 @@ void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
/* Show stack trace if this Fatality happened in kernel mode */
if (!user_mode(regs))
show_stacktrace(current, regs);
show_stacktrace(current, regs, KERN_DEFAULT);
}

6
arch/arc/mm/fault.c
View File

@ -107,7 +107,7 @@ void do_page_fault(unsigned long address, struct pt_regs *regs)
flags |= FAULT_FLAG_WRITE;
retry:
down_read(&mm->mmap_sem);
mmap_read_lock(mm);
vma = find_vma(mm, address);
if (!vma)
@ -141,7 +141,7 @@ retry:
}
/*
* Fault retry nuances, mmap_sem already relinquished by core mm
* Fault retry nuances, mmap_lock already relinquished by core mm
*/
if (unlikely((fault & VM_FAULT_RETRY) &&
(flags & FAULT_FLAG_ALLOW_RETRY))) {
@ -150,7 +150,7 @@ retry:
}
bad_area:
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
/*
* Major/minor page fault accounting

12
arch/arc/mm/highmem.c
View File

@ -6,8 +6,8 @@
#include <linux/memblock.h>
#include <linux/export.h>
#include <linux/highmem.h>
#include <linux/pgtable.h>
#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
@ -92,17 +92,9 @@ EXPORT_SYMBOL(kunmap_atomic_high);
static noinline pte_t * __init alloc_kmap_pgtable(unsigned long kvaddr)
{
pgd_t *pgd_k;
p4d_t *p4d_k;
pud_t *pud_k;
pmd_t *pmd_k;
pmd_t *pmd_k = pmd_off_k(kvaddr);
pte_t *pte_k;
pgd_k = pgd_offset_k(kvaddr);
p4d_k = p4d_offset(pgd_k, kvaddr);
pud_k = pud_offset(p4d_k, kvaddr);
pmd_k = pmd_offset(pud_k, kvaddr);
pte_k = (pte_t *)memblock_alloc_low(PAGE_SIZE, PAGE_SIZE);
if (!pte_k)
panic("%s: Failed to allocate %lu bytes align=0x%lx\n",

2
arch/arc/mm/tlbex.S
View File

@ -33,9 +33,9 @@
*/
#include <linux/linkage.h>
#include <linux/pgtable.h>
#include <asm/entry.h>
#include <asm/mmu.h>
#include <asm/pgtable.h>
#include <asm/arcregs.h>
#include <asm/cache.h>
#include <asm/processor.h>

3
arch/arm/include/asm/bug.h
View File

@ -82,7 +82,8 @@ void hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int,
struct pt_regs *),
int sig, int code, const char *name);
extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
extern asmlinkage void c_backtrace(unsigned long fp, int pmode,
const char *loglvl);
struct mm_struct;
void show_pte(const char *lvl, struct mm_struct *mm, unsigned long addr);

1
arch/arm/include/asm/efi.h
View File

@ -13,7 +13,6 @@
#include <asm/highmem.h>
#include <asm/mach/map.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/ptrace.h>
#ifdef CONFIG_EFI

2
arch/arm/include/asm/fixmap.h
View File

@ -6,8 +6,8 @@
#define FIXADDR_END 0xfff00000UL
#define FIXADDR_TOP (FIXADDR_END - PAGE_SIZE)
#include <linux/pgtable.h>
#include <asm/kmap_types.h>
#include <asm/pgtable.h>
enum fixed_addresses {
FIX_EARLYCON_MEM_BASE,

2
arch/arm/include/asm/idmap.h
View File

@ -3,7 +3,7 @@
#define __ASM_IDMAP_H
#include <linux/compiler.h>
#include <asm/pgtable.h>
#include <linux/pgtable.h>
/* Tag a function as requiring to be executed via an identity mapping. */
#define __idmap __section(.idmap.text) noinline notrace

1
arch/arm/include/asm/pgtable-2level.h
View File

@ -187,6 +187,7 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
{
return (pmd_t *)pud;
}
#define pmd_offset pmd_offset
#define pmd_large(pmd) (pmd_val(pmd) & 2)
#define pmd_leaf(pmd) (pmd_val(pmd) & 2)

7
arch/arm/include/asm/pgtable-3level.h
View File

@ -133,13 +133,6 @@ static inline pmd_t *pud_page_vaddr(pud_t pud)
return __va(pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK);
}
/* Find an entry in the second-level page table.. */
#define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
{
return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(addr);
}
#define pmd_bad(pmd) (!(pmd_val(pmd) & 2))
#define copy_pmd(pmdpd,pmdps) \

3
arch/arm/include/asm/pgtable-nommu.h
View File

@ -22,7 +22,6 @@
#define pgd_bad(pgd) (0)
#define pgd_clear(pgdp)
#define kern_addr_valid(addr) (1)
#define pmd_offset(a, b) ((void *)0)
/* FIXME */
/*
* PMD_SHIFT determines the size of the area a second-level page table can map
@ -73,8 +72,6 @@ extern unsigned int kobjsize(const void *objp);
#define FIRST_USER_ADDRESS 0UL
#include <asm-generic/pgtable.h>
#else
/*

25
arch/arm/include/asm/pgtable.h
View File

@ -166,14 +166,6 @@ extern struct page *empty_zero_page;
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
/* to find an entry in a page-table-directory */
#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
#define pmd_none(pmd) (!pmd_val(pmd))
static inline pte_t *pmd_page_vaddr(pmd_t pmd)
@ -183,21 +175,6 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd)
#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
#ifndef CONFIG_HIGHPTE
#define __pte_map(pmd) pmd_page_vaddr(*(pmd))
#define __pte_unmap(pte) do { } while (0)
#else
#define __pte_map(pmd) (pte_t *)kmap_atomic(pmd_page(*(pmd)))
#define __pte_unmap(pte) kunmap_atomic(pte)
#endif
#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
#define pte_offset_kernel(pmd,addr) (pmd_page_vaddr(*(pmd)) + pte_index(addr))
#define pte_offset_map(pmd,addr) (__pte_map(pmd) + pte_index(addr))
#define pte_unmap(pte) __pte_unmap(pte)
#define pte_pfn(pte) ((pte_val(pte) & PHYS_MASK) >> PAGE_SHIFT)
#define pfn_pte(pfn,prot) __pte(__pfn_to_phys(pfn) | pgprot_val(prot))
@ -339,8 +316,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
/* FIXME: this is not correct */
#define kern_addr_valid(addr) (1)
#include <asm-generic/pgtable.h>
/*
* We provide our own arch_get_unmapped_area to cope with VIPT caches.
*/

3
arch/arm/include/asm/traps.h
View File

@ -29,7 +29,8 @@ static inline int __in_irqentry_text(unsigned long ptr)
}
extern void __init early_trap_init(void *);
extern void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame);
extern void dump_backtrace_entry(unsigned long where, unsigned long from,
unsigned long frame, const char *loglvl);
extern void ptrace_break(struct pt_regs *regs);
extern void *vectors_page;

3
arch/arm/include/asm/unwind.h
View File

@ -36,7 +36,8 @@ extern struct unwind_table *unwind_table_add(unsigned long start,
unsigned long text_addr,
unsigned long text_size);
extern void unwind_table_del(struct unwind_table *tab);
extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk);
extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk,
const char *loglvl);
#endif /* !__ASSEMBLY__ */

2
arch/arm/kernel/head.S
View File

@ -10,6 +10,7 @@
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/pgtable.h>
#include <asm/assembler.h>
#include <asm/cp15.h>
@ -18,7 +19,6 @@
#include <asm/asm-offsets.h>
#include <asm/memory.h>
#include <asm/thread_info.h>
#include <asm/pgtable.h>
#if defined(CONFIG_DEBUG_LL) && !defined(CONFIG_DEBUG_SEMIHOSTING)
#include CONFIG_DEBUG_LL_INCLUDE

1
arch/arm/kernel/machine_kexec.c
View File

@ -10,7 +10,6 @@
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/memblock.h>
#include <asm/pgtable.h>
#include <linux/of_fdt.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>

1
arch/arm/kernel/module.c
View File

@ -17,7 +17,6 @@
#include <linux/string.h>
#include <linux/gfp.h>
#include <asm/pgtable.h>
#include <asm/sections.h>
#include <asm/smp_plat.h>
#include <asm/unwind.h>

4
arch/arm/kernel/process.c
View File

@ -431,7 +431,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
npages = 1; /* for sigpage */
npages += vdso_total_pages;
if (down_write_killable(&mm->mmap_sem))
if (mmap_write_lock_killable(mm))
return -EINTR;
hint = sigpage_addr(mm, npages);
addr = get_unmapped_area(NULL, hint, npages << PAGE_SHIFT, 0, 0);
@ -458,7 +458,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
arm_install_vdso(mm, addr + PAGE_SIZE);
up_fail:
up_write(&mm->mmap_sem);
mmap_write_unlock(mm);
return ret;
}
#endif

1
arch/arm/kernel/ptrace.c
View File

@ -25,7 +25,6 @@
#include <linux/tracehook.h>
#include <linux/unistd.h>
#include <asm/pgtable.h>
#include <asm/traps.h>
#define CREATE_TRACE_POINTS

1
arch/arm/kernel/smp.c
View File

@ -37,7 +37,6 @@
#include <asm/idmap.h>
#include <asm/topology.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/procinfo.h>
#include <asm/processor.h>

2
arch/arm/kernel/suspend.c
View File

@ -2,12 +2,12 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/mm_types.h>
#include <linux/pgtable.h>
#include <asm/bugs.h>
#include <asm/cacheflush.h>
#include <asm/idmap.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/memory.h>
#include <asm/smp_plat.h>
#include <asm/suspend.h>

4
arch/arm/kernel/swp_emulate.c
View File

@ -97,12 +97,12 @@ static void set_segfault(struct pt_regs *regs, unsigned long addr)
{
int si_code;
down_read(&current->mm->mmap_sem);
mmap_read_lock(current->mm);
if (find_vma(current->mm, addr) == NULL)
si_code = SEGV_MAPERR;
else
si_code = SEGV_ACCERR;
up_read(&current->mm->mmap_sem);
mmap_read_unlock(current->mm);
pr_debug("SWP{B} emulation: access caused memory abort!\n");
arm_notify_die("Illegal memory access", regs,

39
arch/arm/kernel/traps.c
View File

@ -62,21 +62,24 @@ __setup("user_debug=", user_debug_setup);
static void dump_mem(const char *, const char *, unsigned long, unsigned long);
void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame)
void dump_backtrace_entry(unsigned long where, unsigned long from,
unsigned long frame, const char *loglvl)
{
unsigned long end = frame + 4 + sizeof(struct pt_regs);
#ifdef CONFIG_KALLSYMS
printk("[<%08lx>] (%ps) from [<%08lx>] (%pS)\n", where, (void *)where, from, (void *)from);
printk("%s[<%08lx>] (%ps) from [<%08lx>] (%pS)\n",
loglvl, where, (void *)where, from, (void *)from);
#else
printk("Function entered at [<%08lx>] from [<%08lx>]\n", where, from);
printk("%sFunction entered at [<%08lx>] from [<%08lx>]\n",
loglvl, where, from);
#endif
if (in_entry_text(from) && end <= ALIGN(frame, THREAD_SIZE))
dump_mem("", "Exception stack", frame + 4, end);
dump_mem(loglvl, "Exception stack", frame + 4, end);
}
void dump_backtrace_stm(u32 *stack, u32 instruction)
void dump_backtrace_stm(u32 *stack, u32 instruction, const char *loglvl)
{
char str[80], *p;
unsigned int x;
@ -88,12 +91,12 @@ void dump_backtrace_stm(u32 *stack, u32 instruction)
if (++x == 6) {
x = 0;
p = str;
printk("%s\n", str);
printk("%s%s\n", loglvl, str);
}
}
}
if (p != str)
printk("%s\n", str);
printk("%s%s\n", loglvl, str);
}
#ifndef CONFIG_ARM_UNWIND
@ -201,17 +204,19 @@ static void dump_instr(const char *lvl, struct pt_regs *regs)
}
#ifdef CONFIG_ARM_UNWIND
static inline void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
static inline void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
const char *loglvl)
{
unwind_backtrace(regs, tsk);
unwind_backtrace(regs, tsk, loglvl);
}
#else
static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
const char *loglvl)
{
unsigned int fp, mode;
int ok = 1;
printk("Backtrace: ");
printk("%sBacktrace: ", loglvl);
if (!tsk)
tsk = current;
@ -238,13 +243,13 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
pr_cont("\n");
if (ok)
c_backtrace(fp, mode);
c_backtrace(fp, mode, loglvl);
}
#endif
void show_stack(struct task_struct *tsk, unsigned long *sp)
void show_stack(struct task_struct *tsk, unsigned long *sp, const char *loglvl)
{
dump_backtrace(NULL, tsk);
dump_backtrace(NULL, tsk, loglvl);
barrier();
}
@ -288,7 +293,7 @@ static int __die(const char *str, int err, struct pt_regs *regs)
if (!user_mode(regs) || in_interrupt()) {
dump_mem(KERN_EMERG, "Stack: ", regs->ARM_sp,
THREAD_SIZE + (unsigned long)task_stack_page(tsk));
dump_backtrace(regs, tsk);
dump_backtrace(regs, tsk, KERN_EMERG);
dump_instr(KERN_EMERG, regs);
}
@ -663,10 +668,10 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
if (user_debug & UDBG_SYSCALL) {
pr_err("[%d] %s: arm syscall %d\n",
task_pid_nr(current), current->comm, no);
dump_instr("", regs);
dump_instr(KERN_ERR, regs);
if (user_mode(regs)) {
__show_regs(regs);
c_backtrace(frame_pointer(regs), processor_mode(regs));
c_backtrace(frame_pointer(regs), processor_mode(regs), KERN_ERR);
}
}
#endif

5
arch/arm/kernel/unwind.c
View File

@ -455,7 +455,8 @@ int unwind_frame(struct stackframe *frame)
return URC_OK;
}
void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk)
void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk,
const char *loglvl)
{
struct stackframe frame;
@ -493,7 +494,7 @@ void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk)
urc = unwind_frame(&frame);
if (urc < 0)
break;
dump_backtrace_entry(where, frame.pc, frame.sp - 4);
dump_backtrace_entry(where, frame.pc, frame.sp - 4, loglvl);
}
}

2
arch/arm/kernel/vdso.c
View File

@ -240,7 +240,7 @@ static int install_vvar(struct mm_struct *mm, unsigned long addr)
return PTR_ERR_OR_ZERO(vma);
}
/* assumes mmap_sem is write-locked */
/* assumes mmap_lock is write-locked */
void arm_install_vdso(struct mm_struct *mm, unsigned long addr)
{
struct vm_area_struct *vma;

2
arch/arm/kernel/vmlinux.lds.S
View File

@ -8,13 +8,13 @@
#include "vmlinux-xip.lds.S"
#else
#include <linux/pgtable.h>
#include <asm-generic/vmlinux.lds.h>
#include <asm/cache.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/mpu.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include "vmlinux.lds.h"

9
arch/arm/lib/backtrace-clang.S
View File

@ -17,6 +17,7 @@
#define sv_pc r6
#define mask r7
#define sv_lr r8
#define loglvl r9
ENTRY(c_backtrace)
@ -99,6 +100,7 @@ ENDPROC(c_backtrace)
@ to ensure 8 byte alignment
movs frame, r0 @ if frame pointer is zero
beq no_frame @ we have no stack frames
mov loglvl, r2
tst r1, #0x10 @ 26 or 32-bit mode?
moveq mask, #0xfc000003
movne mask, #0 @ mask for 32-bit
@ -167,6 +169,7 @@ finished_setup:
mov r1, sv_lr
mov r2, frame
bic r1, r1, mask @ mask PC/LR for the mode
mov r3, loglvl
bl dump_backtrace_entry
/*
@ -183,6 +186,7 @@ finished_setup:
ldr r0, [frame] @ locals are stored in
@ the preceding frame
subeq r0, r0, #4
mov r2, loglvl
bleq dump_backtrace_stm @ dump saved registers
/*
@ -196,7 +200,8 @@ finished_setup:
bhi for_each_frame
1006: adr r0, .Lbad
mov r1, frame
mov r1, loglvl
mov r2, frame
bl printk
no_frame: ldmfd sp!, {r4 - r9, fp, pc}
ENDPROC(c_backtrace)
@ -209,7 +214,7 @@ ENDPROC(c_backtrace)
.long 1005b, 1006b
.popsection
.Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n"
.Lbad: .asciz "%sBacktrace aborted due to bad frame pointer <%p>\n"
.align
.Lopcode: .word 0xe92d4800 >> 11 @ stmfd sp!, {... fp, lr}
.word 0x0b000000 @ bl if these bits are set

14
arch/arm/lib/backtrace.S
View File

@ -18,6 +18,7 @@
#define sv_pc r6
#define mask r7
#define offset r8
#define loglvl r9
ENTRY(c_backtrace)
@ -25,9 +26,10 @@ ENTRY(c_backtrace)
ret lr
ENDPROC(c_backtrace)
#else
stmfd sp!, {r4 - r8, lr} @ Save an extra register so we have a location...
stmfd sp!, {r4 - r9, lr} @ Save an extra register so we have a location...
movs frame, r0 @ if frame pointer is zero
beq no_frame @ we have no stack frames
mov loglvl, r2
tst r1, #0x10 @ 26 or 32-bit mode?
ARM( moveq mask, #0xfc000003 )
@ -73,6 +75,7 @@ for_each_frame: tst frame, mask @ Check for address exceptions
ldr r1, [frame, #-4] @ get saved lr
mov r2, frame
bic r1, r1, mask @ mask PC/LR for the mode
mov r3, loglvl
bl dump_backtrace_entry
ldr r1, [sv_pc, #-4] @ if stmfd sp!, {args} exists,
@ -80,12 +83,14 @@ for_each_frame: tst frame, mask @ Check for address exceptions
teq r3, r1, lsr #11
ldreq r0, [frame, #-8] @ get sp
subeq r0, r0, #4 @ point at the last arg
mov r2, loglvl
bleq dump_backtrace_stm @ dump saved registers
1004: ldr r1, [sv_pc, #0] @ if stmfd sp!, {..., fp, ip, lr, pc}
ldr r3, .Ldsi @ instruction exists,
teq r3, r1, lsr #11
subeq r0, frame, #16
mov r2, loglvl
bleq dump_backtrace_stm @ dump saved registers
teq sv_fp, #0 @ zero saved fp means
@ -96,9 +101,10 @@ for_each_frame: tst frame, mask @ Check for address exceptions
bhi for_each_frame
1006: adr r0, .Lbad
mov r1, frame
mov r1, loglvl
mov r2, frame
bl printk
no_frame: ldmfd sp!, {r4 - r8, pc}
no_frame: ldmfd sp!, {r4 - r9, pc}
ENDPROC(c_backtrace)
.pushsection __ex_table,"a"
@ -109,7 +115,7 @@ ENDPROC(c_backtrace)
.long 1004b, 1006b
.popsection
.Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n"
.Lbad: .asciz "%sBacktrace aborted due to bad frame pointer <%p>\n"
.align
.Ldsi: .word 0xe92dd800 >> 11 @ stmfd sp!, {... fp, ip, lr, pc}
.word 0xe92d0000 >> 11 @ stmfd sp!, {}

16
arch/arm/lib/uaccess_with_memcpy.c
View File

@ -101,7 +101,7 @@ __copy_to_user_memcpy(void __user *to, const void *from, unsigned long n)
atomic = faulthandler_disabled();
if (!atomic)
down_read(&current->mm->mmap_sem);
mmap_read_lock(current->mm);
while (n) {
pte_t *pte;
spinlock_t *ptl;
@ -109,11 +109,11 @@ __copy_to_user_memcpy(void __user *to, const void *from, unsigned long n)
while (!pin_page_for_write(to, &pte, &ptl)) {
if (!atomic)
up_read(&current->mm->mmap_sem);
mmap_read_unlock(current->mm);
if (__put_user(0, (char __user *)to))
goto out;
if (!atomic)
down_read(&current->mm->mmap_sem);
mmap_read_lock(current->mm);
}
tocopy = (~(unsigned long)to & ~PAGE_MASK) + 1;
@ -133,7 +133,7 @@ __copy_to_user_memcpy(void __user *to, const void *from, unsigned long n)
spin_unlock(ptl);
}
if (!atomic)
up_read(&current->mm->mmap_sem);
mmap_read_unlock(current->mm);
out:
return n;
@ -170,17 +170,17 @@ __clear_user_memset(void __user *addr, unsigned long n)
return 0;
}
down_read(&current->mm->mmap_sem);
mmap_read_lock(current->mm);
while (n) {
pte_t *pte;
spinlock_t *ptl;
int tocopy;
while (!pin_page_for_write(addr, &pte, &ptl)) {
up_read(&current->mm->mmap_sem);
mmap_read_unlock(current->mm);
if (__put_user(0, (char __user *)addr))
goto out;
down_read(&current->mm->mmap_sem);
mmap_read_lock(current->mm);
}
tocopy = (~(unsigned long)addr & ~PAGE_MASK) + 1;
@ -198,7 +198,7 @@ __clear_user_memset(void __user *addr, unsigned long n)
else
spin_unlock(ptl);
}
up_read(&current->mm->mmap_sem);
mmap_read_unlock(current->mm);
out:
return n;

1
arch/arm/mach-ebsa110/core.c
View File

@ -17,7 +17,6 @@
#include <asm/irq.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/system_misc.h>

1
arch/arm/mach-footbridge/common.c
View File

@ -14,7 +14,6 @@
#include <linux/spinlock.h>
#include <video/vga.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/irq.h>
#include <asm/mach-types.h>

1
arch/arm/mach-imx/mm-imx21.c
View File

@ -8,7 +8,6 @@
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/pinctrl/machine.h>
#include <asm/pgtable.h>
#include <asm/mach/map.h>
#include "common.h"

1
arch/arm/mach-imx/mm-imx27.c
View File

@ -8,7 +8,6 @@
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/pinctrl/machine.h>
#include <asm/pgtable.h>
#include <asm/mach/map.h>
#include "common.h"

1
arch/arm/mach-imx/mm-imx3.c
View File

@ -13,7 +13,6 @@
#include <linux/io.h>
#include <linux/pinctrl/machine.h>
#include <asm/pgtable.h>
#include <asm/system_misc.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/map.h>

2
arch/arm/mach-integrator/core.c
View File

@ -21,10 +21,10 @@
#include <linux/stat.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/pgtable.h>
#include <asm/mach-types.h>
#include <asm/mach/time.h>
#include <asm/pgtable.h>
#include "hardware.h"
#include "cm.h"

1
arch/arm/mach-iop32x/i2c.c
View File

@ -17,7 +17,6 @@
#include <linux/serial_core.h>
#include <linux/io.h>
#include <linux/gpio/machine.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/mach/map.h>
#include <asm/setup.h>

1
arch/arm/mach-iop32x/iq31244.c
View File

@ -31,7 +31,6 @@
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include "hardware.h"
#include "irqs.h"

1
arch/arm/mach-iop32x/iq80321.c
View File

@ -27,7 +27,6 @@
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include "hardware.h"
#include "irqs.h"

1
arch/arm/mach-iop32x/n2100.c
View File

@ -35,7 +35,6 @@
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include "hardware.h"
#include "irqs.h"

1
arch/arm/mach-ixp4xx/common.c
View File

@ -33,7 +33,6 @@
#include <mach/hardware.h>
#include <mach/io.h>
#include <linux/uaccess.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/exception.h>
#include <asm/irq.h>

2
arch/arm/mach-keystone/platsmp.c
View File

@ -12,11 +12,11 @@
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/pgtable.h>
#include <asm/smp_plat.h>
#include <asm/prom.h>
#include <asm/tlbflush.h>
#include <asm/pgtable.h>
#include "keystone.h"

3
arch/arm/mach-sa1100/assabet.c
View File

@ -34,7 +34,6 @@
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/mach/arch.h>
@ -633,7 +632,7 @@ static void __init map_sa1100_gpio_regs( void )
int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
pmd_t *pmd;
pmd = pmd_offset(pud_offset(p4d_offset(pgd_offset_k(virt), virt), virt), virt);
pmd = pmd_off_k(virt);
*pmd = __pmd(phys | prot);
flush_pmd_entry(pmd);
}

2
arch/arm/mach-sa1100/hackkit.c
View File

@ -22,11 +22,11 @@
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/pgtable.h>
#include <asm/mach-types.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>

2
arch/arm/mach-tegra/iomap.h
View File

@ -10,7 +10,7 @@
#ifndef __MACH_TEGRA_IOMAP_H
#define __MACH_TEGRA_IOMAP_H
#include <asm/pgtable.h>
#include <linux/pgtable.h>
#include <linux/sizes.h>
#define TEGRA_IRAM_BASE 0x40000000

2
arch/arm/mach-zynq/common.c
View File

@ -24,13 +24,13 @@
#include <linux/irqchip/arm-gic.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
#include <linux/pgtable.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/smp_scu.h>
#include <asm/system_info.h>
#include <asm/hardware/cache-l2x0.h>

1
arch/arm/mm/copypage-v4mc.c
View File

@ -14,7 +14,6 @@
#include <linux/mm.h>
#include <linux/highmem.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>

1
arch/arm/mm/copypage-v6.c
View File

@ -9,7 +9,6 @@
#include <linux/mm.h>
#include <linux/highmem.h>
#include <asm/pgtable.h>
#include <asm/shmparam.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>

1
arch/arm/mm/copypage-xscale.c
View File

@ -14,7 +14,6 @@
#include <linux/mm.h>
#include <linux/highmem.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>

1
arch/arm/mm/dump.c
View File

@ -16,7 +16,6 @@
#include <asm/domain.h>
#include <asm/fixmap.h>
#include <asm/memory.h>
#include <asm/pgtable.h>
#include <asm/ptdump.h>
static struct addr_marker address_markers[] = {

1
arch/arm/mm/fault-armv.c
View File

@ -17,7 +17,6 @@
#include <asm/bugs.h>
#include <asm/cacheflush.h>
#include <asm/cachetype.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include "mm.h"

9
arch/arm/mm/fault.c
View File

@ -18,7 +18,6 @@
#include <linux/highmem.h>
#include <linux/perf_event.h>
#include <asm/pgtable.h>
#include <asm/system_misc.h>
#include <asm/system_info.h>
#include <asm/tlbflush.h>
@ -272,11 +271,11 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
* validly references user space from well defined areas of the code,
* we can bug out early if this is from code which shouldn't.
*/
if (!down_read_trylock(&mm->mmap_sem)) {
if (!mmap_read_trylock(mm)) {
if (!user_mode(regs) && !search_exception_tables(regs->ARM_pc))
goto no_context;
retry:
down_read(&mm->mmap_sem);
mmap_read_lock(mm);
} else {
/*
* The above down_read_trylock() might have succeeded in
@ -294,7 +293,7 @@ retry:
fault = __do_page_fault(mm, addr, fsr, flags, tsk);
/* If we need to retry but a fatal signal is pending, handle the
* signal first. We do not need to release the mmap_sem because
* signal first. We do not need to release the mmap_lock because
* it would already be released in __lock_page_or_retry in
* mm/filemap.c. */
if (fault_signal_pending(fault, regs)) {
@ -326,7 +325,7 @@ retry:
}
}
up_read(&mm->mmap_sem);
mmap_read_unlock(mm);
/*
* Handle the "normal" case first - VM_FAULT_MAJOR

4
arch/arm/mm/highmem.c
View File

@ -18,7 +18,7 @@
static inline void set_fixmap_pte(int idx, pte_t pte)
{
unsigned long vaddr = __fix_to_virt(idx);
pte_t *ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
pte_t *ptep = virt_to_kpte(vaddr);
set_pte_ext(ptep, pte, 0);
local_flush_tlb_kernel_page(vaddr);
@ -26,7 +26,7 @@ static inline void set_fixmap_pte(int idx, pte_t pte)
static inline pte_t get_fixmap_pte(unsigned long vaddr)
{
pte_t *ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
pte_t *ptep = virt_to_kpte(vaddr);
return *ptep;
}

2
arch/arm/mm/idmap.c
View File

@ -3,12 +3,12 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm_types.h>
#include <linux/pgtable.h>
#include <asm/cputype.h>
#include <asm/idmap.h>
#include <asm/hwcap.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/sections.h>
#include <asm/system_info.h>

29
arch/arm/mm/ioremap.c
View File

@ -141,16 +141,8 @@ void __check_vmalloc_seq(struct mm_struct *mm)
static void unmap_area_sections(unsigned long virt, unsigned long size)
{
unsigned long addr = virt, end = virt + (size & ~(SZ_1M - 1));
pgd_t *pgd;
p4d_t *p4d;
pud_t *pud;
pmd_t *pmdp;
pmd_t *pmdp = pmd_off_k(addr);
flush_cache_vunmap(addr, end);
pgd = pgd_offset_k(addr);
p4d = p4d_offset(pgd, addr);
pud = pud_offset(p4d, addr);
pmdp = pmd_offset(pud, addr);
do {
pmd_t pmd = *pmdp;
@ -191,10 +183,7 @@ remap_area_sections(unsigned long virt, unsigned long pfn,
size_t size, const struct mem_type *type)
{
unsigned long addr = virt, end = virt + size;
pgd_t *pgd;
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
pmd_t *pmd = pmd_off_k(addr);
/*
* Remove and free any PTE-based mapping, and
@ -202,10 +191,6 @@ remap_area_sections(unsigned long virt, unsigned long pfn,
*/
unmap_area_sections(virt, size);
pgd = pgd_offset_k(addr);
p4d = p4d_offset(pgd, addr);
pud = pud_offset(p4d, addr);
pmd = pmd_offset(pud, addr);
do {
pmd[0] = __pmd(__pfn_to_phys(pfn) | type->prot_sect);
pfn += SZ_1M >> PAGE_SHIFT;
@ -225,21 +210,13 @@ remap_area_supersections(unsigned long virt, unsigned long pfn,
size_t size, const struct mem_type *type)
{
unsigned long addr = virt, end = virt + size;
pgd_t *pgd;
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
pmd_t *pmd = pmd_off_k(addr);
/*
* Remove and free any PTE-based mapping, and
* sync the current kernel mapping.
*/
unmap_area_sections(virt, size);
pgd = pgd_offset_k(virt);
p4d = p4d_offset(pgd, addr);
pud = pud_offset(p4d, addr);
pmd = pmd_offset(pud, addr);
do {
unsigned long super_pmd_val, i;

8
arch/arm/mm/mm.h
View File

@ -2,8 +2,7 @@
#ifdef CONFIG_MMU
#include <linux/list.h>
#include <linux/vmalloc.h>
#include <asm/pgtable.h>
#include <linux/pgtable.h>
/* the upper-most page table pointer */
extern pmd_t *top_pmd;
@ -36,11 +35,6 @@ static inline pte_t get_top_pte(unsigned long va)
return *ptep;
}
static inline pmd_t *pmd_off_k(unsigned long virt)
{
return pmd_offset(pud_offset(p4d_offset(pgd_offset_k(virt), virt), virt), virt);
}
struct mem_type {
pteval_t prot_pte;
pteval_t prot_pte_s2;

7
arch/arm/mm/mmu.c
View File

@ -356,12 +356,7 @@ static pte_t *pte_offset_late_fixmap(pmd_t *dir, unsigned long addr)
static inline pmd_t * __init fixmap_pmd(unsigned long addr)
{
pgd_t *pgd = pgd_offset_k(addr);
p4d_t *p4d = p4d_offset(pgd, addr);
pud_t *pud = pud_offset(p4d, addr);
pmd_t *pmd = pmd_offset(pud, addr);
return pmd;
return pmd_off_k(addr);
}
void __init early_fixmap_init(void)

1
arch/arm/mm/pageattr.c
View File

@ -5,7 +5,6 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/set_memory.h>

2
arch/arm/mm/proc-arm1020.S
View File

@ -11,11 +11,11 @@
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/pgtable.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/hwcap.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/ptrace.h>
#include "proc-macros.S"

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