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[3/4] btrfs: use smaller type for btrfs_path lowest_level

Message ID b49c7436746ae42a2e7876ff32228fcdbb8d81d4.1448637387.git.dsterba@suse.com (mailing list archive)
State Accepted
Headers show

Commit Message

David Sterba Nov. 27, 2015, 3:31 p.m. UTC 
The level is 0..7, we can use smaller type. The size of btrfs_path is now
136 bytes from 144, which is +2 objects that fit into a 4k slab.

Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/ctree.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 64c1d96d9bf9..4e00412dc5ff 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -598,7 +598,7 @@  struct btrfs_path {
 	int locks[BTRFS_MAX_LEVEL];
 	u8 reada;
 	/* keep some upper locks as we walk down */
-	int lowest_level;
+	u8 lowest_level;
 
 	/*
 	 * set by btrfs_split_item, tells search_slot to keep all locks