From 94e92e7ac90d06e1e839e112d3ae80b2457dbdd7 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Mon, 17 Jul 2017 08:45:34 +0100
Subject: [PATCH] vfs: Add sb_rdonly(sb) to query the MS_RDONLY flag on s_flags
Add an sb_rdonly() function to query the MS_RDONLY flag on sb->s_flags
preparatory to providing an SB_RDONLY flag.
Signed-off-by: David Howells <dhowells@redhat.com>
---
include/linux/fs.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 7b5d6816542b7..6ae137c1bdf67 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1844,7 +1844,8 @@ struct super_operations {
*/
#define __IS_FLG(inode, flg) ((inode)->i_sb->s_flags & (flg))
-#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
+static inline bool sb_rdonly(const struct super_block *sb) { return sb->s_flags & MS_RDONLY; }
+#define IS_RDONLY(inode) sb_rdonly((inode)->i_sb)
#define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || \
((inode)->i_flags & S_SYNC))
#define IS_DIRSYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \
--
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