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-rw-r--r--fs/cifs/cifsglob.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 2e960e1049db..d78bfcc19156 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -1210,7 +1210,7 @@ struct cifs_search_info {
bool smallBuf:1; /* so we know which buf_release function to call */
};
-#define ACL_NO_MODE -1
+#define ACL_NO_MODE ((umode_t)(-1))
struct cifs_open_parms {
struct cifs_tcon *tcon;
struct cifs_sb_info *cifs_sb;
@@ -1391,6 +1391,11 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
struct cifsInodeInfo {
bool can_cache_brlcks;
struct list_head llist; /* locks helb by this inode */
+ /*
+ * NOTE: Some code paths call down_read(lock_sem) twice, so
+ * we must always use use cifs_down_write() instead of down_write()
+ * for this semaphore to avoid deadlocks.
+ */
struct rw_semaphore lock_sem; /* protect the fields above */
/* BB add in lists for dirty pages i.e. write caching info for oplock */
struct list_head openFileList;