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Date: Sun, 22 Apr 2018 18:10:57 -0700 From: Amir Goldstein <amir73il@...il.com> To: Theodore Tso <tytso@....edu> Cc: Jan Kara <jack@...e.cz>, linux-ext4@...r.kernel.org Subject: [PATCH v2 1/3] 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@...il.com> --- include/linux/fs.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 760d8da1b6c7..cac41f1bad05 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -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); -- 2.7.4
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