Commit 0c8e3fe3 authored May 13, 2018 by Amir Goldstein Committed by Theodore Ts'o May 13, 2018

vfs: add the sb_start_intwrite_trylock() helper



Needed by ext4 to test frozen fs before updating s_last_mounted.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>

parent eee597ac

include/linux/fs.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -1597,6 +1597,11 @@ static inline void sb_start_intwrite(struct super_block *sb)
		__sb_start_write(sb, SB_FREEZE_FS, true);
		}

		static inline int sb_start_intwrite_trylock(struct super_block *sb)
		{
		return __sb_start_write(sb, SB_FREEZE_FS, false);
		}


		extern bool inode_owner_or_capable(const struct inode *inode);