Messages in this thread Patch in this message | | | Date | Mon, 13 Jul 2015 23:25:52 +0200 | From | Oleg Nesterov <> | Subject | [PATCH 2/4] introduce sb_unlock_frozen() |
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Preaparation. Add the trivial helper which does the wakeup. --- fs/super.c | 12 ++++++++---- 1 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/fs/super.c b/fs/super.c index 5ea0edd..c23bafc 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1254,6 +1254,12 @@ static void sb_wait_write(struct super_block *sb, int level) } while (writers); } +static void sb_unlock_frozen(struct super_block *sb) +{ + smp_wmb(); + wake_up(&sb->s_writers.wait_unfrozen); +} + /** * freeze_super - lock the filesystem and force it into a consistent state * @sb: the super to lock @@ -1340,8 +1346,7 @@ int freeze_super(struct super_block *sb) printk(KERN_ERR "VFS:Filesystem freeze failed\n"); sb->s_writers.frozen = SB_UNFROZEN; - smp_wmb(); - wake_up(&sb->s_writers.wait_unfrozen); + sb_unlock_frozen(sb); deactivate_locked_super(sb); return ret; } @@ -1387,8 +1392,7 @@ int thaw_super(struct super_block *sb) out: sb->s_writers.frozen = SB_UNFROZEN; - smp_wmb(); - wake_up(&sb->s_writers.wait_unfrozen); + sb_unlock_frozen(sb); deactivate_locked_super(sb); return 0; -- 1.5.5.1
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