[PATCH v3 01/11] backports: igb fixes for linux-3.12

[Stefan Assmann <sassmann@kpanic.de>]

- refactor u64_stats_sync.h a bit
- add u64_stats_init define

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
---
 backport/backport-include/linux/u64_stats_sync.h | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/backport/backport-include/linux/u64_stats_sync.h b/backport/backport-include/linux/u64_stats_sync.h
index f15116c..ce6b778 100644
--- a/backport/backport-include/linux/u64_stats_sync.h
+++ b/backport/backport-include/linux/u64_stats_sync.h
@@ -1,6 +1,17 @@
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0))
+#ifndef __BACKPORT_LINUX_U64_STATS_SYNC_H
+#define __BACKPORT_LINUX_U64_STATS_SYNC_H
+
 #include_next <linux/u64_stats_sync.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0)
+#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
+# define u64_stats_init(syncp)	seqcount_init(syncp.seq)
 #else
+# define u64_stats_init(syncp)	do { } while (0)
+#endif
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0) */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,6,0)
 #ifndef _LINUX_U64_STATS_SYNC_H
 #define _LINUX_U64_STATS_SYNC_H
 
@@ -141,4 +152,5 @@ static inline bool u64_stats_fetch_retry_bh(const struct u64_stats_sync *syncp,
 }
 
 #endif /* _LINUX_U64_STATS_SYNC_H */
-#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0)) */
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,6,0) */
+#endif /* __BACKPORT_LINUX_U64_STATS_SYNC_H */
-- 
1.8.4.2