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| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2010-07-01 13:28:27 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-07-01 22:45:54 -0700 |
| commit | 7475271004b66e9c22e1bb28f240a38c5d6fe76e (patch) | |
| tree | 780205700baeec41d6ed491cf28737a1491227a8 /arch | |
| parent | fe62c298e5bcff8b3414205b7b54975918b3b5c4 (diff) | |
| download | op-kernel-dev-7475271004b66e9c22e1bb28f240a38c5d6fe76e.zip op-kernel-dev-7475271004b66e9c22e1bb28f240a38c5d6fe76e.tar.gz | |
x86: Drop CONFIG_MCORE2 check around setting of NET_IP_ALIGN
This patch removes the CONFIG_MCORE2 check from around NET_IP_ALIGN. It is
based on a suggestion from Andi Kleen. The assumption is that there are
not any x86 cores where unaligned access is really slow, and this change
would allow for a performance improvement to still exist on configurations
that are not necessarily optimized for Core 2.
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/system.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/include/asm/system.h b/arch/x86/include/asm/system.h index b4293fc..1db9bd2 100644 --- a/arch/x86/include/asm/system.h +++ b/arch/x86/include/asm/system.h @@ -457,7 +457,6 @@ static inline void rdtsc_barrier(void) alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC); } -#ifdef CONFIG_MCORE2 /* * We handle most unaligned accesses in hardware. On the other hand * unaligned DMA can be quite expensive on some Nehalem processors. @@ -465,5 +464,4 @@ static inline void rdtsc_barrier(void) * Based on this we disable the IP header alignment in network drivers. */ #define NET_IP_ALIGN 0 -#endif #endif /* _ASM_X86_SYSTEM_H */ |
