btrfs: add helper for fs_info->closing
wrap checking of filesystem 'closing' flag and fix a few missing memory
barriers.
Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index bffa5c4..ad14473 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -98,7 +98,7 @@
return inode;
spin_lock(&block_group->lock);
- if (!root->fs_info->closing) {
+ if (!btrfs_fs_closing(root->fs_info)) {
block_group->inode = igrab(inode);
block_group->iref = 1;
}
@@ -493,8 +493,7 @@
* If we're unmounting then just return, since this does a search on the
* normal root and not the commit root and we could deadlock.
*/
- smp_mb();
- if (fs_info->closing)
+ if (btrfs_fs_closing(fs_info))
return 0;
/*
@@ -2513,7 +2512,7 @@
return inode;
spin_lock(&root->cache_lock);
- if (!root->fs_info->closing)
+ if (!btrfs_fs_closing(root->fs_info))
root->cache_inode = igrab(inode);
spin_unlock(&root->cache_lock);
@@ -2543,8 +2542,7 @@
* If we're unmounting then just return, since this does a search on the
* normal root and not the commit root and we could deadlock.
*/
- smp_mb();
- if (fs_info->closing)
+ if (btrfs_fs_closing(fs_info))
return 0;
path = btrfs_alloc_path();