inode: move to per-sb LRU locks

With the inode LRUs moving to per-sb structures, there is no longer
a need for a global inode_lru_lock. The locking can be made more
fine-grained by moving to a per-sb LRU lock, isolating the LRU
operations of different filesytsems completely from each other.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9724f0a48742..460d2cc21ec6 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1397,7 +1397,8 @@ struct super_block {
         struct list_head        s_dentry_lru;   /* unused dentry lru */
         int                     s_nr_dentry_unused;     /* # of dentry on lru */
 
-        /* inode_lru_lock protects s_inode_lru and s_nr_inodes_unused */
+        /* s_inode_lru_lock protects s_inode_lru and s_nr_inodes_unused */
+        spinlock_t              s_inode_lru_lock ____cacheline_aligned_in_smp;
         struct list_head        s_inode_lru;            /* unused inode lru */
         int                     s_nr_inodes_unused;     /* # of inodes on lru */