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authorAlexander Duyck <alexander.h.duyck@intel.com>2010-07-01 17:28:27 +0400
committerDavid S. Miller <davem@davemloft.net>2010-07-02 09:45:54 +0400
commit7475271004b66e9c22e1bb28f240a38c5d6fe76e (patch)
tree780205700baeec41d6ed491cf28737a1491227a8 /arch
parentfe62c298e5bcff8b3414205b7b54975918b3b5c4 (diff)
downloadlinux-7475271004b66e9c22e1bb28f240a38c5d6fe76e.tar.xz
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.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/include/asm/system.h b/arch/x86/include/asm/system.h
index b4293fc8b798..1db9bd2281d7 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 */