From 5f6dbc9e4afe4d1d39e85de3ac2720a2042ad191 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 15 Oct 2010 15:34:06 -0400 Subject: cifs: convert cifsFileInfo->count to non-atomic counter The count for cifsFileInfo is currently an atomic, but that just adds complexity for little value. We generally need to hold cifs_file_list_lock to traverse the lists anyway so we might as well make this counter non-atomic and simply use the cifs_file_list_lock to protect it. Signed-off-by: Jeff Layton Reviewed-by: Suresh Jayaraman Signed-off-by: Steve French --- fs/cifs/cifsglob.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'fs/cifs/cifsglob.h') diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 3365e77f6f24..6319db025e7b 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -395,16 +395,19 @@ struct cifsFileInfo { struct list_head llist; /* list of byte range locks we have. */ bool invalidHandle:1; /* file closed via session abend */ bool oplock_break_cancelled:1; - atomic_t count; /* reference count */ + int count; /* refcount -- protected by cifs_file_list_lock */ struct mutex fh_mutex; /* prevents reopen race after dead ses*/ struct cifs_search_info srch_inf; struct work_struct oplock_break; /* work for oplock breaks */ }; -/* Take a reference on the file private data */ +/* + * Take a reference on the file private data. Must be called with + * cifs_file_list_lock held. + */ static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file) { - atomic_inc(&cifs_file->count); + ++cifs_file->count; } void cifsFileInfo_put(struct cifsFileInfo *cifs_file); -- cgit v1.2.3