UBIFS: make ubifs_ro_mode() not inline

We use ubifs_ro_mode() quite a lot, and not in fast-path, so
there is no reason to blow the code up by having it inlined.
Also, we usually want R/O mode change to be seen to other
CPUs as soon as possible, so when we make this a function
call, we will automatically have a memory barrier.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

fs/ubifs/io.c

@@ -53,6 +53,20 @@
 #include <linux/crc32.h>
 #include "ubifs.h"
 
+/**
+ * ubifs_ro_mode - switch UBIFS to read read-only mode.
+ * @c: UBIFS file-system description object
+ * @err: error code which is the reason of switching to R/O mode
+ */
+void ubifs_ro_mode(struct ubifs_info *c, int err)
+{
+	if (!c->ro_media) {
+		c->ro_media = 1;
+		ubifs_warn("switched to read-only mode, error %d", err);
+		dbg_dump_stack();
+	}
+}
+
 /**
  * ubifs_check_node - check node.
  * @c: UBIFS file-system description object

fs/ubifs/misc.h

@@ -79,20 +79,6 @@ static inline struct ubifs_inode *ubifs_inode(const struct inode *inode)
 	return container_of(inode, struct ubifs_inode, vfs_inode);
 }
 
-/**
- * ubifs_ro_mode - switch UBIFS to read read-only mode.
- * @c: UBIFS file-system description object
- * @err: error code which is the reason of switching to R/O mode
- */
-static inline void ubifs_ro_mode(struct ubifs_info *c, int err)
-{
-	if (!c->ro_media) {
-		c->ro_media = 1;
-		ubifs_warn("switched to read-only mode, error %d", err);
-		dbg_dump_stack();
-	}
-}
-
 /**
  * ubifs_compr_present - check if compressor was compiled in.
  * @compr_type: compressor type to check

fs/ubifs/ubifs.h

@@ -1346,6 +1346,7 @@ extern struct backing_dev_info ubifs_backing_dev_info;
 extern struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
 
 /* io.c */
+void ubifs_ro_mode(struct ubifs_info *c, int err);
 int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len);
 int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs,
 			   int dtype);