diff options
| author | Jan Beulich | 2005-10-30 23:59:27 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2005-10-31 02:37:11 +0100 |
| commit | 8896fab35e62aa748a5ce62ac773508e51f10be1 (patch) | |
| tree | bb8f2dce7b5d0aa6ffe68aa6b97920d2ce32e164 /arch/i386 | |
| parent | [PATCH] i386 and x86_64 TSC set_cyc2ns_scale imprecision (diff) | |
| download | kernel-qcow2-linux-8896fab35e62aa748a5ce62ac773508e51f10be1.tar.gz kernel-qcow2-linux-8896fab35e62aa748a5ce62ac773508e51f10be1.tar.xz kernel-qcow2-linux-8896fab35e62aa748a5ce62ac773508e51f10be1.zip | |
[PATCH] x86: cmpxchg improvements
This adjusts i386's cmpxchg patterns so that
- for word and long cmpxchg-es the compiler can utilize all possible
registers
- cmpxchg8b gets disabled when the minimum specified hardware architectur
doesn't support it (like was already happening for the byte, word, and
long ones).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index 2e3e8dbcb79f..35d3cff30057 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -424,6 +424,11 @@ config X86_POPAD_OK depends on !M386 default y +config X86_CMPXCHG64 + bool + depends on !M386 && !M486 + default y + config X86_ALIGNMENT_16 bool depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1 |