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[PATCH] alpha: task_stack_page()

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use task_stack_page() for accesses to stack page of task in alpha-specific
parts of tree

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Al Viro 2006-01-12 01:05:36 -08:00 committed by Linus Torvalds
parent 37bfbaf995
commit 27f451304a
3 changed files with 5 additions and 5 deletions
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6
arch/alpha/kernel/process.c
View File

@ -276,7 +276,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
{
extern void ret_from_fork(void);
struct thread_info *childti = p->thread_info;
struct thread_info *childti = task_thread_info(p);
struct pt_regs * childregs;
struct switch_stack * childstack, *stack;
unsigned long stack_offset, settls;
@ -285,7 +285,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
if (!(regs->ps & 8))
stack_offset = (PAGE_SIZE-1) & (unsigned long) regs;
childregs = (struct pt_regs *)
(stack_offset + PAGE_SIZE + (long) childti);
(stack_offset + PAGE_SIZE + task_stack_page(p));
*childregs = *regs;
settls = regs->r20;
@ -492,7 +492,7 @@ out:
unsigned long
thread_saved_pc(task_t *t)
{
unsigned long base = (unsigned long)t->thread_info;
unsigned long base = (unsigned long)task_stack_page(t);
unsigned long fp, sp = task_thread_info(t)->pcb.ksp;
if (sp > base && sp+6*8 < base + 16*1024) {

2
arch/alpha/kernel/ptrace.c
View File

@ -110,7 +110,7 @@ get_reg_addr(struct task_struct * task, unsigned long regno)
zero = 0;
addr = &zero;
} else {
addr = (void *)task->thread_info + regoff[regno];
addr = task_stack_page(task) + regoff[regno];
}
return addr;
}

2
include/asm-alpha/ptrace.h
View File

@ -76,7 +76,7 @@ struct switch_stack {
extern void show_regs(struct pt_regs *);
#define alpha_task_regs(task) \
((struct pt_regs *) ((long) (task)->thread_info + 2*PAGE_SIZE) - 1)
((struct pt_regs *) (task_stack_page(task) + 2*PAGE_SIZE) - 1)
#define force_successful_syscall_return() (alpha_task_regs(current)->r0 = 0)