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| author |   Zachary Amsden <zach@vmware.com> | 2005-09-03 15:56:38 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 00:06:11 -0700 |
| commit | 4d37e7e3fd851428dede4d05d3e69d03795a744a (patch) | |
| tree | f830928a0baf81f462bc9176dacbaad2dac2bb65 /include/asm-i386/system.h | |
| parent | [PATCH] i386: cleanup serialize msr (diff) | |
| download | linux-dev-4d37e7e3fd851428dede4d05d3e69d03795a744a.tar.xz linux-dev-4d37e7e3fd851428dede4d05d3e69d03795a744a.zip | |
[PATCH] i386: inline assembler: cleanup and encapsulate descriptor and task register management
i386 inline assembler cleanup.
This change encapsulates descriptor and task register management. Also,
it is possible to improve assembler generation in two cases; savesegment
may store the value in a register instead of a memory location, which
allows GCC to optimize stack variables into registers, and MOV MEM, SEG
is always a 16-bit write to memory, making the casting in math-emu
unnecessary.
Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386/system.h')
| -rw-r--r-- | include/asm-i386/system.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h index 8048a5e018cd..37fd2f8c7196 100644 --- a/include/asm-i386/system.h +++ b/include/asm-i386/system.h @@ -93,13 +93,13 @@ static inline unsigned long _get_base(char * addr) ".align 4\n\t" \ ".long 1b,3b\n" \ ".previous" \ - : :"m" (value)) + : :"rm" (value)) /* * Save a segment register away */ #define savesegment(seg, value) \ - asm volatile("mov %%" #seg ",%0":"=m" (value)) + asm volatile("mov %%" #seg ",%0":"=rm" (value)) /* * Clear and set 'TS' bit respectively |