diff options
| author | David Sterba <dsterba@suse.cz> | 2012-01-26 15:01:12 -0500 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2012-02-15 10:40:25 -0500 |
| commit | c08782dacd7a098f2b8bca7f4a57a5b402e9e1e5 (patch) | |
| tree | f86a4875ac874cd3ddd0cc2eae85701e87105a72 /fs/btrfs/ctree.h | |
| parent | 87826df0ec36fc28884b4ddbb3f3af41c4c2008f (diff) | |
btrfs: fix structs where bitfields and spinlock/atomic share 8B word
On ia64, powerpc64 and sparc64 the bitfield is modified through a RMW cycle and current
gcc rewrites the adjacent 4B word, which in case of a spinlock or atomic has
disaterous effect.
https://lkml.org/lkml/2012/2/1/220
Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 3c2cbf7b6663..8e4457e0478e 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h | |||
| @@ -886,7 +886,7 @@ struct btrfs_block_rsv { | |||
| 886 | u64 reserved; | 886 | u64 reserved; |
| 887 | struct btrfs_space_info *space_info; | 887 | struct btrfs_space_info *space_info; |
| 888 | spinlock_t lock; | 888 | spinlock_t lock; |
| 889 | unsigned int full:1; | 889 | unsigned int full; |
| 890 | }; | 890 | }; |
| 891 | 891 | ||
| 892 | /* | 892 | /* |