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Code Issues Releases Wiki Activity

cifs: remove superfluous inode_lock in cifs_{strict_}fsync

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Originally, filemap_write_and_wait took the i_mutex internally, but
commit 02c24a8218 pushed the mutex acquisition into the individual
fsync routines, leaving it up to the subsystem maintainers to remove
it if it wasn't needed.

For cifs, I see no reason to take the inode_lock here. All of the
operations inside that lock are protected in other ways.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Jeff Layton 2019-04-08 10:59:42 -04:00 committed by Steve French
parent 214bab4484
commit 0ae3fa4dc1
1 changed files with 0 additions and 5 deletions
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5
fs/cifs/file.c
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@ -2443,7 +2443,6 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end,
rc = file_write_and_wait_range(file, start, end);
if (rc)
return rc;
inode_lock(inode);
xid = get_xid();
@ -2468,7 +2467,6 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end,
}
free_xid(xid);
inode_unlock(inode);
return rc;
}
@ -2480,12 +2478,10 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
struct TCP_Server_Info *server;
struct cifsFileInfo *smbfile = file->private_data;
struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
struct inode *inode = file->f_mapping->host;
rc = file_write_and_wait_range(file, start, end);
if (rc)
return rc;
inode_lock(inode);
xid = get_xid();
@ -2502,7 +2498,6 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
}
free_xid(xid);
inode_unlock(inode);
return rc;
}