From: Nicholas Piggin <npiggin@gmail.com>
Date: Tue, 3 Jan 2017 18:22:33 +0000 (+1000)
Subject: nfs: no PG_private waiters remain, remove waker
X-Git-Tag: v5.15~11596^2~52
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=600424e3d91be7c6c8c38b95db713983a6307efa;p=platform%2Fkernel%2Flinux-starfive.git

nfs: no PG_private waiters remain, remove waker

Since commit 4f52b6bb ("NFS: Don't call COMMIT in ->releasepage()"),
no tasks wait on PagePrivate, so the wake introduced in commit 95905446
("NFS: avoid deadlocks with loop-back mounted NFS filesystems.") can
be removed.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index ad4219a..e75b056 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -728,8 +728,6 @@ static void nfs_inode_remove_request(struct nfs_page *req)
 		if (likely(head->wb_page && !PageSwapCache(head->wb_page))) {
 			set_page_private(head->wb_page, 0);
 			ClearPagePrivate(head->wb_page);
-			smp_mb__after_atomic();
-			wake_up_page(head->wb_page, PG_private);
 			clear_bit(PG_MAPPED, &head->wb_flags);
 		}
 		nfsi->nrequests--;