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| author | Al Viro <viro@ftp.linux.org.uk> | 2006-01-12 01:06:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-12 09:08:57 -0800 |
| commit | 0cec6fd1370807f98934e84c9e6147335b81d8a5 (patch) | |
| tree | ead813727b785ec973ef88158895cca381a25027 /arch/powerpc/kernel/process.c | |
| parent | b5e2fc1c6259e6f26bc4ae4de697da1f8da0edec (diff) | |
| download | lwn-0cec6fd1370807f98934e84c9e6147335b81d8a5.tar.gz lwn-0cec6fd1370807f98934e84c9e6147335b81d8a5.zip | |
[PATCH] powerpc: task_stack_page()
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>
Diffstat (limited to 'arch/powerpc/kernel/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index bc03526d25de..1f816f0d7740 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -503,7 +503,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp, { struct pt_regs *childregs, *kregs; extern void ret_from_fork(void); - unsigned long sp = (unsigned long)p->thread_info + THREAD_SIZE; + unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE; CHECK_FULL_REGS(regs); /* Copy registers */ @@ -588,10 +588,8 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp) * set. Do it now. */ if (!current->thread.regs) { - unsigned long childregs = (unsigned long)current->thread_info + - THREAD_SIZE; - childregs -= sizeof(struct pt_regs); - current->thread.regs = (struct pt_regs *)childregs; + struct pt_regs *regs = task_stack_page(current) + THREAD_SIZE; + current->thread.regs = regs - 1; } memset(regs->gpr, 0, sizeof(regs->gpr)); @@ -767,7 +765,7 @@ out: static int validate_sp(unsigned long sp, struct task_struct *p, unsigned long nbytes) { - unsigned long stack_page = (unsigned long)p->thread_info; + unsigned long stack_page = (unsigned long)task_stack_page(p); if (sp >= stack_page + sizeof(struct thread_struct) && sp <= stack_page + THREAD_SIZE - nbytes) |