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authorGerd Hoffmann <kraxel@suse.de>2006-06-26 07:56:16 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 13:48:14 -0400
commitd167a51877e94dda73dd656c51f363502309f713 (patch)
treeeb02c2974b61777f575dfdc07d4c2adf83bde434 /include/asm-x86_64/mutex.h
parent240cd6a80642da528bfa382ec2ae4e3cb8991ea7 (diff)
[PATCH] x86_64: x86_64 version of the smp alternative patch.
Changes are largely identical to the i386 version: * alternative #define are moved to the new alternative.h file. * one new elf section with pointers to the lock prefixes which can be nop'ed out for non-smp. * two new elf sections simliar to the "classic" alternatives to replace SMP code with simpler UP code. * fixup headers to use alternative.h instead of defining their own LOCK / LOCK_PREFIX macros. The patch reuses the i386 version of the alternatives code to avoid code duplication. The code in alternatives.c was shuffled around a bit to reduce the number of #ifdefs needed. It also got some tweaks needed for x86_64 (vsyscall page handling) and new features (noreplacement option which was x86_64 only up to now). Debug printk's are changed from compile-time to runtime. Loosely based on a early version from Bastian Blank <waldi@debian.org> Signed-off-by: Gerd Hoffmann <kraxel@suse.de> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/mutex.h')
-rw-r--r--include/asm-x86_64/mutex.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-x86_64/mutex.h b/include/asm-x86_64/mutex.h
index 11fbee2bd6c0..06fab6de2a88 100644
--- a/include/asm-x86_64/mutex.h
+++ b/include/asm-x86_64/mutex.h
@@ -24,7 +24,7 @@ do { \
24 typecheck_fn(fastcall void (*)(atomic_t *), fail_fn); \ 24 typecheck_fn(fastcall void (*)(atomic_t *), fail_fn); \
25 \ 25 \
26 __asm__ __volatile__( \ 26 __asm__ __volatile__( \
27 LOCK " decl (%%rdi) \n" \ 27 LOCK_PREFIX " decl (%%rdi) \n" \
28 " js 2f \n" \ 28 " js 2f \n" \
29 "1: \n" \ 29 "1: \n" \
30 \ 30 \
@@ -74,7 +74,7 @@ do { \
74 typecheck_fn(fastcall void (*)(atomic_t *), fail_fn); \ 74 typecheck_fn(fastcall void (*)(atomic_t *), fail_fn); \
75 \ 75 \
76 __asm__ __volatile__( \ 76 __asm__ __volatile__( \
77 LOCK " incl (%%rdi) \n" \ 77 LOCK_PREFIX " incl (%%rdi) \n" \
78 " jle 2f \n" \ 78 " jle 2f \n" \
79 "1: \n" \ 79 "1: \n" \
80 \ 80 \