+ taskstats-drop-the-unused-cpu_dont_care-enum-member.patch added to mm-nonmm-unstable branch

+ taskstats-drop-the-unused-cpu_dont_care-enum-member.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: taskstats: drop the unused CPU_DONT_CARE enum member
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     taskstats-drop-the-unused-cpu_dont_care-enum-member.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/taskstats-drop-the-unused-cpu_dont_care-enum-member.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Bradley Morgan <brads@mainlining.org>
Subject: taskstats: drop the unused CPU_DONT_CARE enum member
Date: Tue, 15 Sep 2026 18:06:23 +0000

CPU_DONT_CARE was added by the original listener cpumask code in 2006
(f9fd8914c1ac) and has never had a single user, not even in the
commit that introduced it. It survived every refactor of the listener
path since, including the recent handler folds.

Kill it, twenty years is enough.

Link: https://lore.kernel.org/20260915180623.22058-1-brads@mainlining.org
Signed-off-by: Bradley Morgan <brads@mainlining.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Balbir Singh <balbirs@nvidia.com>
---

 kernel/taskstats.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/kernel/taskstats.c~taskstats-drop-the-unused-cpu_dont_care-enum-member
+++ a/kernel/taskstats.c
@@ -59,8 +59,7 @@ static DEFINE_PER_CPU(struct listener_li
 
 enum actions {
 	REGISTER,
-	DEREGISTER,
-	CPU_DONT_CARE
+	DEREGISTER
 };
 
 static int prepare_reply(struct genl_info *info, u8 cmd, struct sk_buff **skbp,
_

Patches currently in -mm which might be from brads@mainlining.org are

taskstats-copy-signal-stats-under-siglock-in-taskstats_exit.patch
mailmap-update-email-address-for-bradley-morgan.patch
taskstats-drop-the-unused-cpu_dont_care-enum-member.patch