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/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index fad821991369..80242f5bd621 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5572,14 +5572,14 @@ check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
         flctx = inode->i_flctx;
 
         if (flctx && !list_empty_careful(&flctx->flc_posix)) {
-                spin_lock(&inode->i_lock);
+                spin_lock(&flctx->flc_lock);
                 list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
                         if (fl->fl_owner == (fl_owner_t)lowner) {
                                 status = true;
                                 break;
                         }
                 }
-                spin_unlock(&inode->i_lock);
+                spin_unlock(&flctx->flc_lock);
         }
         fput(filp);
         return status;