locks: add a dedicated spinlock to protect i_flctx lists

We can now add a dedicated spinlock without expanding struct inode.
Change to using that to protect the various i_flctx lists.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Acked-by: Christoph Hellwig <hch@lst.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 784c13485b3f..4ae66f416eb9 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1206,7 +1206,7 @@ static int nfs_can_extend_write(struct file *file, struct page *page, struct ino
 
         /* Check to see if there are whole file write locks */
         ret = 0;
-        spin_lock(&inode->i_lock);
+        spin_lock(&flctx->flc_lock);
         if (!list_empty(&flctx->flc_posix)) {
                 fl = list_first_entry(&flctx->flc_posix, struct file_lock,
                                         fl_list);
@@ -1218,7 +1218,7 @@ static int nfs_can_extend_write(struct file *file, struct page *page, struct ino
                 if (fl->fl_type == F_WRLCK)
                         ret = 1;
         }
-        spin_unlock(&inode->i_lock);
+        spin_unlock(&flctx->flc_lock);
         return ret;
 }