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Subject[PATCH 04/13] vfs: fs_may_remount_ro: turn unnecessary check into a WARN_ON
Date
From: Miklos Szeredi <mszeredi@suse.cz>

Now a successful sb_prepare_remount_readonly() should ensure that no
writable files remain for this superblock. So turn this check into a
WARN_ON.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
---
fs/file_table.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/file_table.c b/fs/file_table.c
index c322794..dc9f437 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -486,8 +486,11 @@ int fs_may_remount_ro(struct super_block *sb)
if (inode->i_nlink == 0)
goto too_bad;

- /* Writeable file? */
- if (S_ISREG(inode->i_mode) && (file->f_mode & FMODE_WRITE))
+ /*
+ * Writable file?
+ * Should be caught by sb_prepare_remount_readonly().
+ */
+ if (WARN_ON(S_ISREG(inode->i_mode) && (file->f_mode & FMODE_WRITE)))
goto too_bad;
} while_file_list_for_each_entry;
lg_global_unlock(files_lglock);
--
1.7.3.4


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