Merge to Fedora kernel-2.6.7-1.441

[linux-2.6.git] / include / asm-ppc64 / system.h

diff --git a/include/asm-ppc64/system.h b/include/asm-ppc64/system.h
index bb1ebb2..8d8a6f8 100644 (file)
--- a/include/asm-ppc64/system.h
+++ b/include/asm-ppc64/system.h
@@ -111,6 +111,8 @@ extern void flush_instruction_cache(void);
 extern int _get_PVR(void);
 extern void giveup_fpu(struct task_struct *);
 extern void disable_kernel_fp(void);
+extern void flush_fp_to_thread(struct task_struct *);
+extern void flush_altivec_to_thread(struct task_struct *);
 extern void enable_kernel_fp(void);
 extern void giveup_altivec(struct task_struct *);
 extern void disable_kernel_altivec(void);
@@ -277,5 +279,14 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
                                    (unsigned long)_n_, sizeof(*(ptr))); \
   })
 
+/*
+ * We handle most unaligned accesses in hardware. On the other hand 
+ * unaligned DMA can be very expensive on some ppc64 IO chips (it does
+ * powers of 2 writes until it reaches sufficient alignment).
+ *
+ * Based on this we disable the IP header alignment in network drivers.
+ */
+#define NET_IP_ALIGN   0
+
 #endif /* __KERNEL__ */
 #endif