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authorChristoph Hellwig <hch@lst.de>2016-11-30 14:33:25 +1100
committerDave Chinner <david@fromorbit.com>2016-11-30 14:33:25 +1100
commit6552321831dce87ff5c466a55b58d472732caadc (patch)
tree84f3de7b89690c84fd13e2efa7a85d4918d342e3 /fs/xfs/xfs_pnfs.h
parentf8319483f57f1ca22370f4150bb990aca7728a67 (diff)
downloadlinux-6552321831dce87ff5c466a55b58d472732caadc.tar.bz2
xfs: remove i_iolock and use i_rwsem in the VFS inode instead
This patch drops the XFS-own i_iolock and uses the VFS i_rwsem which recently replaced i_mutex instead. This means we only have to take one lock instead of two in many fast path operations, and we can also shrink the xfs_inode structure. Thanks to the xfs_ilock family there is very little churn, the only thing of note is that we need to switch to use the lock_two_directory helper for taking the i_rwsem on two inodes in a few places to make sure our lock order matches the one used in the VFS. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Jens Axboe <axboe@fb.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_pnfs.h')
-rw-r--r--fs/xfs/xfs_pnfs.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_pnfs.h b/fs/xfs/xfs_pnfs.h
index e8339f74966b..b587cb99b2b7 100644
--- a/fs/xfs/xfs_pnfs.h
+++ b/fs/xfs/xfs_pnfs.h
@@ -8,10 +8,10 @@ int xfs_fs_map_blocks(struct inode *inode, loff_t offset, u64 length,
int xfs_fs_commit_blocks(struct inode *inode, struct iomap *maps, int nr_maps,
struct iattr *iattr);
-int xfs_break_layouts(struct inode *inode, uint *iolock, bool with_imutex);
+int xfs_break_layouts(struct inode *inode, uint *iolock);
#else
static inline int
-xfs_break_layouts(struct inode *inode, uint *iolock, bool with_imutex)
+xfs_break_layouts(struct inode *inode, uint *iolock)
{
return 0;
}