[merged mm-nonmm-stable] once-dont-use-a-work-queue-to-reset-sleepable-static-key.patch removed from -mm tree

[merged mm-nonmm-stable] once-dont-use-a-work-queue-to-reset-sleepable-static-key.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: once: don't use a work queue to reset sleepable static key
has been removed from the -mm tree.  Its filename was
     once-dont-use-a-work-queue-to-reset-sleepable-static-key.patch

This patch was dropped because it was merged into the mm-nonmm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: "Luck, Tony" <tony.luck@intel.com>
Subject: once: don't use a work queue to reset sleepable static key
Date: Mon, 12 Jan 2026 10:08:53 -0800

Pointless overhead to use a work queue to reset the static key for a
DO_ONCE_SLEEPABLE() invocation.

Note that the previous code path included a BUG_ON() if the static key
was already disabled. Dropped that as part of this change because:
1) Use of BUG_ON() is highly discouraged.
2) There is a WARN_ON() in the static_branch_disable() code path
   that would provide adequate breadcrumbs to debug any issue.

Link: https://lkml.kernel.org/r/aWU4tfTju1l3oZCu@agluck-desk3
Signed-off-by: Tony Luck <tony.luck@intel.com>
Reported-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/once.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/once.c~once-dont-use-a-work-queue-to-reset-sleepable-static-key
+++ a/lib/once.c
@@ -93,6 +93,6 @@ void __do_once_sleepable_done(bool *done
 {
 	*done = true;
 	mutex_unlock(&once_mutex);
-	once_disable_jump(once_key, mod);
+	static_branch_disable(once_key);
 }
 EXPORT_SYMBOL(__do_once_sleepable_done);
_

Patches currently in -mm which might be from tony.luck@intel.com are