linux/arch/x86/kernel
Weijie Yang 3c325f8233 x86, cma: Reserve DMA contiguous area after initmem_init()
Fengguang Wu reported a boot crash on the x86 platform
via the 0-day Linux Kernel Performance Test:

  cma: dma_contiguous_reserve: reserving 31 MiB for global area
  BUG: Int 6: CR2   (null)
  [<41850786>] dump_stack+0x16/0x18
  [<41d2b1db>] early_idt_handler+0x6b/0x6b
  [<41072227>] ? __phys_addr+0x2e/0xca
  [<41d4ee4d>] cma_declare_contiguous+0x3c/0x2d7
  [<41d6d359>] dma_contiguous_reserve_area+0x27/0x47
  [<41d6d4d1>] dma_contiguous_reserve+0x158/0x163
  [<41d33e0f>] setup_arch+0x79b/0xc68
  [<41d2b7cf>] start_kernel+0x9c/0x456
  [<41d2b2ca>] i386_start_kernel+0x79/0x7d

(See details at: https://lkml.org/lkml/2014/10/8/708)

It is because dma_contiguous_reserve() is called before
initmem_init() in x86, the variable high_memory is not
initialized but accessed by __pa(high_memory) in
dma_contiguous_reserve().

This patch moves dma_contiguous_reserve() after initmem_init()
so that high_memory is initialized before accessed.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: iamjoonsoo.kim@lge.com
Cc: 'Linux-MM' <linux-mm@kvack.org>
Cc: 'Weijie Yang' <weijie.yang.kh@gmail.com>
Link: http://lkml.kernel.org/r/000101cfef69%2431e528a0%2495af79e0%24%25yang@samsung.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-10-28 07:36:50 +01:00
..
acpi x86: ACPI: Do not translate GSI number if IOAPIC is disabled 2014-10-20 17:23:00 +02:00
apic Linux 3.18-rc1 2014-10-24 13:26:37 -07:00
cpu Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
kprobes kprobes/x86: Free 'optinsn' cache when range check fails 2014-08-27 20:24:32 +02:00
.gitignore
alternative.c kprobes, x86: Allow kprobes on text_poke/hw_breakpoint 2014-04-24 10:03:02 +02:00
amd_gart_64.c x86: enable DMA CMA with swiotlb 2014-06-04 16:53:57 -07:00
amd_nb.c
apb_timer.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
aperture_64.c x86/gart: Tidy messages and add bridge device info 2014-05-23 10:47:19 -06:00
apm_32.c x86: Remove unused variable "polling" 2014-07-16 12:58:47 +02:00
asm-offsets_32.c
asm-offsets_64.c
asm-offsets.c
audit_64.c
bootflag.c
check.c
cpuid.c
crash_dump_32.c
crash_dump_64.c
crash.c kexec: check if crashk_res_low exists when exclude it from crash mem ranges 2014-10-14 02:18:21 +02:00
devicetree.c x86, irq, devicetree: Release IOAPIC pin when PCI device is disabled 2014-06-21 23:05:44 +02:00
doublefault.c
dumpstack_32.c
dumpstack_64.c x86: Fix dumpstack_64 irq stack handling 2014-04-02 11:46:50 -07:00
dumpstack.c kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation 2014-04-24 10:26:38 +02:00
e820.c x86/mm, hibernate: Do not assume the first e820 area to be RAM 2014-09-16 09:54:31 +02:00
early_printk.c
early-quirks.c Merge commit '9e9a928eed8796a0a1aaed7e0b676db86ba84594' into drm-next 2014-06-05 20:28:59 +10:00
entry_32.S i386/audit: stop scribbling on the stack frame 2014-10-24 13:27:56 -07:00
entry_64.S audit: x86: drop arch from __audit_syscall_entry() interface 2014-09-23 16:21:28 -04:00
espfix_64.c x86/espfix/xen: Fix allocation of pages for paravirt page tables 2014-07-14 13:47:32 -07:00
ftrace.c ftrace/x86: Add call to ftrace_graph_is_dead() in function graph code 2014-07-17 09:45:08 -04:00
head32.c asmlinkage, x86: Add explicit __visible to arch/x86/* 2014-05-05 16:07:44 -07:00
head64.c kernel/printk: use symbolic defines for console loglevels 2014-06-04 16:54:17 -07:00
head_32.S
head_64.S
head.c
hpet.c Merge branch 'x86/vdso' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-05 08:05:29 -07:00
hw_breakpoint.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
i386_ksyms_32.c
i387.c x86/xsaves: Clear reserved bits in xsave header 2014-05-29 14:33:00 -07:00
i8237.c
i8253.c
i8259.c x86, irq, pic: Probe for legacy PIC and set legacy_pic appropriately 2014-04-14 11:49:55 -07:00
io_delay.c
ioport.c
iosf_mbi.c x86/platform/intel/iosf: Add debugfs config option for IOSF 2014-09-19 13:08:43 +02:00
irq_32.c
irq_64.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
irq_work.c x86: Tell irq work about self IPI support 2014-09-13 18:38:29 +02:00
irq.c Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-06-12 20:03:47 -07:00
irqinit.c x86: Fix non-PC platform kernel crash on boot due to NULL dereference 2014-08-25 22:36:57 +02:00
jump_label.c
kdebugfs.c
kexec-bzimage64.c kexec-bzimage64: fix sparse warnings 2014-10-14 02:18:21 +02:00
kgdb.c
ksysfs.c
kvm.c Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
kvmclock.c
ldt.c Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option" 2014-05-21 10:22:59 -07:00
machine_kexec_32.c x86: Axe the lightly-used cpu_has_pae 2014-09-11 14:30:01 -07:00
machine_kexec_64.c kexec: create a new config option CONFIG_KEXEC_FILE for new syscall 2014-08-29 16:28:16 -07:00
Makefile x86: Speed up ___preempt_schedule*() by using THUNK helpers 2014-09-24 15:15:38 +02:00
mcount_64.S ftrace: x86: Remove check of obsolete variable function_trace_stop 2014-07-18 13:57:02 -04:00
mmconf-fam10h_64.c
module.c
mpparse.c x86, apic: Remove mps_oem_check callback 2014-07-31 08:05:42 -07:00
msr.c
nmi_selftest.c
nmi.c kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation 2014-04-24 10:26:38 +02:00
paravirt_patch_32.c
paravirt_patch_64.c x86_64/entry/xen: Do not invoke espfix64 on Xen 2014-07-28 15:25:40 -07:00
paravirt-spinlocks.c
paravirt.c kprobes, x86: Prohibit probing on native_set_debugreg()/load_idt() 2014-04-24 10:02:58 +02:00
pci-calgary_64.c x86, calgary: Use 8M TCE table size by default 2014-04-10 19:51:32 -07:00
pci-dma.c arch/x86/kernel/pci-dma.c: fix dma_generic_alloc_coherent() when CONFIG_DMA_CMA is enabled 2014-06-04 16:53:57 -07:00
pci-iommu_table.c
pci-nommu.c
pci-swiotlb.c x86: enable DMA CMA with swiotlb 2014-06-04 16:53:57 -07:00
pcspeaker.c
perf_regs.c
pmc_atom.c x86/platform/pmc_atom: Fix warning when CONFIG_DEBUG_FS=n 2014-09-19 13:02:21 +02:00
probe_roms.c
process_32.c x86: copy_thread: Don't nullify ->ptrace_bps twice 2014-09-02 14:51:17 -07:00
process_64.c x86: copy_thread: Don't nullify ->ptrace_bps twice 2014-09-02 14:51:17 -07:00
process.c x86, fpu: Shift "fpu_counter = 0" from copy_thread() to arch_dup_task_struct() 2014-09-02 14:51:16 -07:00
ptrace.c Merge git://git.infradead.org/users/eparis/audit 2014-10-19 16:25:56 -07:00
pvclock.c
quirks.c x86: HPET force enable for e6xx based systems 2014-09-15 17:53:35 -07:00
reboot_fixups_32.c
reboot.c x86/reboot: Add EFI reboot quirk for ACPI Hardware Reduced flag 2014-07-18 21:23:52 +01:00
relocate_kernel_32.S
relocate_kernel_64.S
resource.c x86: don't exclude low BIOS area when allocating address space for non-PCI cards 2014-07-16 12:29:36 -06:00
rtc.c
setup_percpu.c
setup.c x86, cma: Reserve DMA contiguous area after initmem_init() 2014-10-28 07:36:50 +01:00
signal.c x86, fpu: shift drop_init_fpu() from save_xstate_sig() to handle_signal() 2014-09-02 14:51:14 -07:00
smp.c asmlinkage, x86: Add explicit __visible to arch/x86/* 2014-05-05 16:07:44 -07:00
smpboot.c x86/smpboot: Move data structure to its primary usage scope 2014-10-19 11:44:49 +02:00
stacktrace.c
step.c
sys_x86_64.c
syscall_32.c
syscall_64.c
sysfb_efi.c
sysfb_simplefb.c
sysfb.c
tboot.c
tce_64.c
test_nx.c
test_rodata.c
time.c x86: Fix non-PC platform kernel crash on boot due to NULL dereference 2014-08-25 22:36:57 +02:00
tls.c
tls.h
topology.c
trace_clock.c
tracepoint.c
traps.c x86/kprobes: Fix build errors and blacklist context_track_user 2014-06-14 09:07:44 +02:00
tsc_msr.c
tsc_sync.c
tsc.c x86, apic: Handle a bad TSC more gracefully 2014-10-22 21:31:46 +02:00
uprobes.c uprobes/x86: Rename arch_uprobe->def to ->defparam, minor comment updates 2014-06-05 16:21:57 +02:00
verify_cpu.S
vm86_32.c
vmlinux.lds.S
vsmp_64.c x86/apic/vsmp: Make is_vsmp_box() static 2014-08-01 15:09:45 -07:00
vsyscall_64.c seccomp,x86,arm,mips,s390: Remove nr parameter from secure_computing 2014-09-03 14:58:17 -07:00
vsyscall_emu_64.S
vsyscall_gtod.c timekeeping: Create struct tk_read_base and use it in struct timekeeper 2014-07-23 15:01:53 -07:00
vsyscall_trace.h
x86_init.c
x8664_ksyms_64.c
xsave.c x86, fpu: __restore_xstate_sig()->math_state_restore() needs preempt_disable() 2014-09-02 14:51:15 -07:00