The patch titled
Subject: sched: drop sched.h dependency on cpumask
has been added to the -mm mm-nonmm-unstable branch. Its filename is
sched-drop-schedh-dependency-on-cpumask.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/sched-drop-schedh-dependency-on-cpumask.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Yury Norov <yury.norov@xxxxxxxxx>
Subject: sched: drop sched.h dependency on cpumask
Date: Mon, 27 May 2024 17:56:46 -0700
sched.h needs cpumask.h mostly for types declaration. Now that we have
cpumask_types.h, which is a significantly smaller header, we can rely on
it.
The only exception is UP stub for set_cpus_allowed_ptr(). The function
needs to test bit #0 in a @new_mask, which can be trivially opencoded.
Link: https://lkml.kernel.org/r/20240528005648.182376-5-yury.norov@xxxxxxxxx
Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
Cc: Amit Daniel Kachhap <amit.kachhap@xxxxxxxxx>
Cc: Anna-Maria Behnsen <anna-maria@xxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Cc: Dennis Zhou <dennis@xxxxxxxxxx>
Cc: Frederic Weisbecker <frederic@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Juri Lelli <juri.lelli@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rafael J. Wysocki <rafael@xxxxxxxxxx>
Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Cc: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Cc: Yury Norov <yury.norov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/sched.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/include/linux/sched.h~sched-drop-schedh-dependency-on-cpumask
+++ a/include/linux/sched.h
@@ -13,7 +13,7 @@
#include <asm/processor.h>
#include <linux/thread_info.h>
#include <linux/preempt.h>
-#include <linux/cpumask.h>
+#include <linux/cpumask_types.h>
#include <linux/cache.h>
#include <linux/irqflags_types.h>
@@ -1778,7 +1778,8 @@ static inline void do_set_cpus_allowed(s
}
static inline int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
{
- if (!cpumask_test_cpu(0, new_mask))
+ /* Opencoded cpumask_test_cpu(0, new_mask) to avoid dependency on cpumask.h */
+ if ((*cpumask_bits(new_mask) & 1) == 0)
return -EINVAL;
return 0;
}
_
Patches currently in -mm which might be from yury.norov@xxxxxxxxx are
gcc-disable-warray-bounds-for-gcc-9.patch
maintainers-add-linux-nodemask_typesh-to-bitmap-api.patch
sched-avoid-using-ilog2-in-schedh.patch
sched-drop-schedh-dependency-on-cpumask.patch
cpumask-cleanup-core-headers-inclusion.patch
cpumask-make-core-headers-including-cpumask_typesh-where-possible.patch
