From: Yejune Deng <yejune.deng@gmail.com>
To: peterz@infradead.org, tglx@linutronix.de, bristot@redhat.com,
valentin.schneider@arm.com
Cc: linux-kernel@vger.kernel.org, Yejune Deng <yejunedeng@gmail.com>
Subject: [PATCH] lib/smp_processor_id: Use is_percpu_thread() instead of nr_cpus_allowed
Date: Sat, 8 May 2021 15:25:22 +0800 [thread overview]
Message-ID: <1620458722-13026-1-git-send-email-yejunedeng@gmail.com> (raw)
Use is_percpu_thread() instead of 'current->nr_cpus_allowed == 1',
is_percpu_thread() is includes boths SMP and SP. It also more readable.
The comments are no needed.
Signed-off-by: Yejune Deng <yejunedeng@gmail.com>
---
lib/smp_processor_id.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
index 1c1dbd3..046ac62 100644
--- a/lib/smp_processor_id.c
+++ b/lib/smp_processor_id.c
@@ -19,11 +19,7 @@ unsigned int check_preemption_disabled(const char *what1, const char *what2)
if (irqs_disabled())
goto out;
- /*
- * Kernel threads bound to a single CPU can safely use
- * smp_processor_id():
- */
- if (current->nr_cpus_allowed == 1)
+ if (is_percpu_thread())
goto out;
#ifdef CONFIG_SMP
--
2.7.4
next reply other threads:[~2021-05-08 7:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-08 7:25 Yejune Deng [this message]
2021-05-10 10:54 ` [PATCH] lib/smp_processor_id: Use is_percpu_thread() instead of nr_cpus_allowed Valentin Schneider
2021-05-10 13:43 ` [PATCH v2] lib/smp_processor_id: Use is_percpu_thread() check affinity Yejune Deng
2021-05-10 14:36 ` Valentin Schneider
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