[PATCH] sem2mutex: iprune

[firefly-linux-kernel-4.4.55.git] / fs / inode.c

diff --git a/fs/inode.c b/fs/inode.c
index 603e93ef0c6fd94a3b931e8bcf30988a7e619cb3..25967b67903d791a6bae24f4dc2c20d57023f65d 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -84,14 +84,14 @@ static struct hlist_head *inode_hashtable;
 DEFINE_SPINLOCK(inode_lock);
 
 /*
- * iprune_sem provides exclusion between the kswapd or try_to_free_pages
+ * iprune_mutex provides exclusion between the kswapd or try_to_free_pages
  * icache shrinking path, and the umount path.  Without this exclusion,
  * by the time prune_icache calls iput for the inode whose pages it has
  * been invalidating, or by the time it calls clear_inode & destroy_inode
  * from its final dispose_list, the struct super_block they refer to
  * (for inode->i_sb->s_op) may already have been freed and reused.
  */
-DECLARE_MUTEX(iprune_sem);
+DEFINE_MUTEX(iprune_mutex);
 
 /*
  * Statistics gathering..
@@ -319,7 +319,7 @@ static int invalidate_list(struct list_head *head, struct list_head *dispose)
                /*
                 * We can reschedule here without worrying about the list's
                 * consistency because the per-sb list of inodes must not
-                * change during umount anymore, and because iprune_sem keeps
+                * change during umount anymore, and because iprune_mutex keeps
                 * shrink_icache_memory() away.
                 */
                cond_resched_lock(&inode_lock);
@@ -355,14 +355,14 @@ int invalidate_inodes(struct super_block * sb)
        int busy;
        LIST_HEAD(throw_away);
 
-       down(&iprune_sem);
+       mutex_lock(&iprune_mutex);
        spin_lock(&inode_lock);
        inotify_unmount_inodes(&sb->s_inodes);
        busy = invalidate_list(&sb->s_inodes, &throw_away);
        spin_unlock(&inode_lock);
 
        dispose_list(&throw_away);
-       up(&iprune_sem);
+       mutex_unlock(&iprune_mutex);
 
        return busy;
 }
@@ -377,7 +377,7 @@ int __invalidate_device(struct block_device *bdev)
        if (sb) {
                /*
                 * no need to lock the super, get_super holds the
-                * read semaphore so the filesystem cannot go away
+                * read mutex so the filesystem cannot go away
                 * under us (->put_super runs with the write lock
                 * hold).
                 */
@@ -423,7 +423,7 @@ static void prune_icache(int nr_to_scan)
        int nr_scanned;
        unsigned long reap = 0;
 
-       down(&iprune_sem);
+       mutex_lock(&iprune_mutex);
        spin_lock(&inode_lock);
        for (nr_scanned = 0; nr_scanned < nr_to_scan; nr_scanned++) {
                struct inode *inode;
@@ -459,7 +459,7 @@ static void prune_icache(int nr_to_scan)
        spin_unlock(&inode_lock);
 
        dispose_list(&freeable);
-       up(&iprune_sem);
+       mutex_unlock(&iprune_mutex);
 
        if (current_is_kswapd())
                mod_page_state(kswapd_inodesteal, reap);