Merge: Fixes for: NFS - the task is blocked at __nfs_lookup_revalidate

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/7426

JIRA: https://issues.redhat.com/browse/RHEL-117497

We're missing an smp_mb() before waking the waiters - to fix as upstream, we should take most of the series here:
https://lore.kernel.org/all/20240826063659.15327-1-neilb@suse.de/

and then the NFS fix from Trond:
1db3a48 NFS: Fix wakeup of __nfs_lookup_revalidate() in unblock_revalidate()

And just to make the bots happy:
Omitted-fix: 7266f0a
... because its not a fix for work here, and we don't maintain bcachefs in RHEL.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>

Approved-by: Jay Shin <jaeshin@redhat.com>
Approved-by: Scott Mayhew <smayhew@redhat.com>
Approved-by: Olga Kornievskaia <okorniev@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Patrick Talbert <ptalbert@redhat.com>

Author: ptalbert

fs/nfs/dir.c

@@ -1840,9 +1840,7 @@ static void block_revalidate(struct dentry *dentry)
 
 static void unblock_revalidate(struct dentry *dentry)
 {
-	/* store_release ensures wait_var_event() sees the update */
-	smp_store_release(&dentry->d_fsdata, NULL);
-	wake_up_var(&dentry->d_fsdata);
+	store_release_wake_up(&dentry->d_fsdata, NULL);
 }
 
 /*