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Groups > linux.kernel > #1727761
| From | Andy Lutomirski <luto@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC 11/17] x86/asm: Add task_top_of_stack() to find the top of a task's stack |
| Date | 2017-09-06 23:40 +0200 |
| Message-ID | <umQdc-7qi-21@gated-at.bofh.it> (permalink) |
| References | <umQdc-7qi-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
This will let us get rid of a few places that hardcode accesses to thread.sp0. Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/include/asm/processor.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 85ddfc1a9bb5..f83fbf1b6dd9 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -788,6 +788,8 @@ static inline void spin_lock_prefetch(const void *x) #define TOP_OF_INIT_STACK ((unsigned long)&init_stack + sizeof(init_stack) - \ TOP_OF_KERNEL_STACK_PADDING) +#define task_top_of_stack(task) ((unsigned long)(task_pt_regs(task) + 1)) + #ifdef CONFIG_X86_32 /* * User space process size: 3GB (default). -- 2.13.5
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[RFC 11/17] x86/asm: Add task_top_of_stack() to find the top of a task's stack Andy Lutomirski <luto@kernel.org> - 2017-09-06 23:40 +0200
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