From: NeilBrown <neilb@suse.de>
Subject: kabi fix for NFSv4: Wait for stateid updates after CLOSE/OPEN_DOWNGRADE
Patch-mainline: Never, kabi
References: bsc#1196247
We cannot add waitq to state, so use a bit waitqueue.
Signed-off-by: Neil Brown <neilb@suse.com>
---
fs/nfs/nfs4proc.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3194,7 +3194,8 @@ static bool nfs4_refresh_open_old_statei
bool ret;
int seq, status = -EAGAIN;
unsigned long deadline = jiffies + 5 * HZ;
-
+ struct wait_queue_head *wq_head = bit_waitqueue(&state->flags,
+ NFS_STATE_CHANGE_WAIT);
DEFINE_WAIT(wait);
for (;;) {
@@ -3223,7 +3224,7 @@ static bool nfs4_refresh_open_old_statei
/* server says we're behind but we haven't seen the update yet */
set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
- prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
+ prepare_to_wait(wq_head, &wait, TASK_KILLABLE);
write_sequnlock(&state->seqlock);
trace_nfs4_close_stateid_update_wait(state->inode, dst, 0);
@@ -3235,7 +3236,7 @@ static bool nfs4_refresh_open_old_statei
!time_after(jiffies, deadline))
status = 0;
- finish_wait(&state->waitq, &wait);
+ finish_wait(wq_head, &wait);
if (!status)
continue;