lkml.org 
[lkml]   [2017]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC 11/17] x86/asm: Add task_top_of_stack() to find the top of a task's stack
Date
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
\
 
 \ /
  Last update: 2017-09-06 23:39    [W:0.179 / U:4.976 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site