Staging: Pohmelfs: Sync fs before killing it, since dentry cache is shrunk before writeback is invoked via generic_shutdown_super()
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c
index 3fef09f..af99f66 100644
--- a/drivers/staging/pohmelfs/inode.c
+++ b/drivers/staging/pohmelfs/inode.c
@@ -1908,11 +1908,29 @@
mnt);
}
+/*
+ * We need this to sync all inodes earlier, since when writeback
+ * is invoked from the umount/mntput path dcache is already shrunk,
+ * see generic_shutdown_super(), and no inodes can access the path.
+ */
+static void pohmelfs_kill_super(struct super_block *sb)
+{
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .range_start = 0,
+ .range_end = LLONG_MAX,
+ .nr_to_write = LONG_MAX,
+ };
+ generic_sync_sb_inodes(sb, &wbc);
+
+ kill_anon_super(sb);
+}
+
static struct file_system_type pohmel_fs_type = {
.owner = THIS_MODULE,
.name = "pohmel",
.get_sb = pohmelfs_get_sb,
- .kill_sb = kill_anon_super,
+ .kill_sb = pohmelfs_kill_super,
};
/*
