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| author | Christoph Hellwig <[email protected]> | 2020-09-28 15:51:08 +0000 |
|---|---|---|
| committer | Darrick J. Wong <[email protected]> | 2020-09-28 15:51:08 +0000 |
| commit | c3d4ed1abecfcfc801199cfadb71f5b80e025d9e (patch) | |
| tree | e9c9f9b12f6161b19673284bfa80719a115d8b59 /drivers/usb/cdns3/cdns3-imx.c | |
| parent | iomap: Set all uptodate bits for an Uptodate page (diff) | |
| download | kernel-c3d4ed1abecfcfc801199cfadb71f5b80e025d9e.tar.gz kernel-c3d4ed1abecfcfc801199cfadb71f5b80e025d9e.zip | |
iomap: Allow filesystem to call iomap_dio_complete without i_rwsem
This is to avoid the deadlock caused in btrfs because of O_DIRECT |
O_DSYNC.
Filesystems such as btrfs require i_rwsem while performing sync on a
file. iomap_dio_rw() is called under i_rw_sem. This leads to a
deadlock because of:
iomap_dio_complete()
generic_write_sync()
btrfs_sync_file()
Separate out iomap_dio_complete() from iomap_dio_rw(), so filesystems
can call iomap_dio_complete() after unlocking i_rwsem.
Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: Goldwyn Rodrigues <[email protected]>
Reviewed-by: Darrick J. Wong <[email protected]>
Signed-off-by: Darrick J. Wong <[email protected]>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-imx.c')
0 files changed, 0 insertions, 0 deletions