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authorTejun Heo <tj@kernel.org>2009-02-09 16:17:40 +0300
committerIngo Molnar <mingo@elte.hu>2009-02-10 02:41:58 +0300
commitd9a89a26e02ef9ed03f74a755a8b4d8f3a066622 (patch)
tree35f3713bca4e6b815f6b9db92dc9d812ec7213ff /arch/x86/include/asm/mmu_context.h
parentf0d96110f9fd98a1a22e03b8adba69508843d910 (diff)
downloadlinux-d9a89a26e02ef9ed03f74a755a8b4d8f3a066622.tar.xz
x86: add %gs accessors for x86_32
Impact: cleanup On x86_32, %gs is handled lazily. It's not saved and restored on kernel entry/exit but only when necessary which usually is during task switch but there are few other places. Currently, it's done by calling savesegment() and loadsegment() explicitly. Define get_user_gs(), set_user_gs() and task_user_gs() and use them instead. While at it, clean up register access macros in signal.c. This cleans up code a bit and will help future changes. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/mmu_context.h')
-rw-r--r--arch/x86/include/asm/mmu_context.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/mmu_context.h b/arch/x86/include/asm/mmu_context.h
index 52948df9cd1d..4955165682c5 100644
--- a/arch/x86/include/asm/mmu_context.h
+++ b/arch/x86/include/asm/mmu_context.h
@@ -79,7 +79,7 @@ do { \
#ifdef CONFIG_X86_32
#define deactivate_mm(tsk, mm) \
do { \
- loadsegment(gs, 0); \
+ set_user_gs(task_pt_regs(tsk), 0); \
} while (0)
#else
#define deactivate_mm(tsk, mm) \