Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6

[deliverable/linux.git] / arch / x86 / include / asm / system.h

diff --git a/arch/x86/include/asm/system.h b/arch/x86/include/asm/system.h
index b8fe48ee2ed971d648fa4ad940a210ddfc9fb90c..33ecc3ea8782add8f88e68405d227ee4af700134 100644 (file)
--- a/arch/x86/include/asm/system.h
+++ b/arch/x86/include/asm/system.h
@@ -451,10 +451,17 @@ void stop_this_cpu(void *dummy);
  *
  * (Could use an alternative three way for this if there was one.)
  */
-static inline void rdtsc_barrier(void)
+static __always_inline void rdtsc_barrier(void)
 {
        alternative(ASM_NOP3, "mfence", X86_FEATURE_MFENCE_RDTSC);
        alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC);
 }
 
+/*
+ * We handle most unaligned accesses in hardware.  On the other hand
+ * unaligned DMA can be quite expensive on some Nehalem processors.
+ *
+ * Based on this we disable the IP header alignment in network drivers.
+ */
+#define NET_IP_ALIGN   0
 #endif /* _ASM_X86_SYSTEM_H */