openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

i386: Use patchable lock prefix in set_64bit 

Previously lock was unconditionally used, but shouldn't be needed on
UP systems.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andi Kleen 2007-07-22 11:12:40 +02:00 committed by Linus Torvalds
parent 57c22f49e4
commit e05aff854c
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/asm-i386/cmpxchg.h
View File

@ -34,7 +34,7 @@ static inline void __set_64bit (unsigned long long * ptr,
"\n1:\t" "\n1:\t"
"movl (%0), %%eax\n\t" "movl (%0), %%eax\n\t"
"movl 4(%0), %%edx\n\t" "movl 4(%0), %%edx\n\t"
"lock cmpxchg8b (%0)\n\t" LOCK_PREFIX "cmpxchg8b (%0)\n\t"
"jnz 1b" "jnz 1b"
: /* no outputs */ : /* no outputs */
: "D"(ptr), : "D"(ptr),