From: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Date: Thu, 8 Jan 2009 15:46:31 +0000 (-0600)
Subject: async: Don't call async_synchronize_full_special() while holding sb_lock
X-Git-Tag: firefly_0821_release~16074
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=96777fe7b042e5a5d0fe5fb861fcd6cd80ef9634;p=firefly-linux-kernel-4.4.55.git

async: Don't call async_synchronize_full_special() while holding sb_lock

sync_filesystems() shouldn't be calling async_synchronize_full_special
while holding a spinlock.  The second while loop in that function is the
right place for this anyway.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Reported-by: Grissiom <chaos.proton@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/super.c b/fs/super.c
index cb20744ec789..7d67387496cb 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -458,7 +458,6 @@ void sync_filesystems(int wait)
 		if (sb->s_flags & MS_RDONLY)
 			continue;
 		sb->s_need_sync_fs = 1;
-		async_synchronize_full_special(&sb->s_async_list);
 	}
 
 restart:
@@ -471,6 +470,7 @@ restart:
 		sb->s_count++;
 		spin_unlock(&sb_lock);
 		down_read(&sb->s_umount);
+		async_synchronize_full_special(&sb->s_async_list);
 		if (sb->s_root && (wait || sb->s_dirt))
 			sb->s_op->sync_fs(sb, wait);
 		up_read(&sb->s_umount);