This fixes the errors

btrfs-list.c: In function 'ino_resolve':
btrfs-list.c:506: error: dereferencing pointer 'sh' does break strict-aliasing 
rules
btrfs-list.c:504: error: dereferencing pointer 'sh' does break strict-aliasing 
rules
btrfs-list.c:502: note: initialized from here

when building with gcc version 4.4.4 (Debian 4.4.4-6).

Signed-off-by: Sage Weil <s...@newdream.net>
---
 ioctl.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/ioctl.h b/ioctl.h
index 5a03317..4a850ff 100644
--- a/ioctl.h
+++ b/ioctl.h
@@ -87,7 +87,7 @@ struct btrfs_ioctl_search_header {
        __u64 offset;
        __u32 type;
        __u32 len;
-};
+} __attribute__((__may_alias__));
 
 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct 
btrfs_ioctl_search_key))
 /*
-- 
1.7.0

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