From: tip-bot for Rik van Riel <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: tglx@linutronix.de, riel@surriel.com, peterz@infradead.org,
linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org,
luto@kernel.org
Subject: [tip:x86/mm] smp: use __cpumask_set_cpu in on_each_cpu_cond
Date: Tue, 9 Oct 2018 07:59:15 -0700 [thread overview]
Message-ID: <tip-c3f7f2c7eba1a53d2e5ffbc2dcc9a20c5f094890@git.kernel.org> (raw)
In-Reply-To: <20180926035844.1420-4-riel@surriel.com>
Commit-ID: c3f7f2c7eba1a53d2e5ffbc2dcc9a20c5f094890
Gitweb: https://git.kernel.org/tip/c3f7f2c7eba1a53d2e5ffbc2dcc9a20c5f094890
Author: Rik van Riel <riel@surriel.com>
AuthorDate: Tue, 25 Sep 2018 23:58:40 -0400
Committer: Peter Zijlstra <peterz@infradead.org>
CommitDate: Tue, 9 Oct 2018 16:51:11 +0200
smp: use __cpumask_set_cpu in on_each_cpu_cond
The code in on_each_cpu_cond sets CPUs in a locally allocated bitmask,
which should never be used by other CPUs simultaneously. There is no
need to use locked memory accesses to set the bits in this bitmap.
Switch to __cpumask_set_cpu.
Cc: npiggin@gmail.com
Cc: mingo@kernel.org
Cc: will.deacon@arm.com
Cc: songliubraving@fb.com
Cc: kernel-team@fb.com
Cc: hpa@zytor.com
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180926035844.1420-4-riel@surriel.com
---
kernel/smp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/smp.c b/kernel/smp.c
index d86eec5f51c1..a7d4f9f50a49 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -682,7 +682,7 @@ void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info),
preempt_disable();
for_each_online_cpu(cpu)
if (cond_func(cpu, info))
- cpumask_set_cpu(cpu, cpus);
+ __cpumask_set_cpu(cpu, cpus);
on_each_cpu_mask(cpus, func, info, wait);
preempt_enable();
free_cpumask_var(cpus);
next prev parent reply other threads:[~2018-10-09 14:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-26 3:58 [PATCH v2 0/7] x86/mm/tlb: make lazy TLB mode even lazier Rik van Riel
2018-09-26 3:58 ` [PATCH 1/7] x86/mm/tlb: Always use lazy TLB mode Rik van Riel
2018-10-01 15:58 ` Peter Zijlstra
2018-10-01 16:07 ` Rik van Riel
2018-09-26 3:58 ` [PATCH 2/7] x86/mm/tlb: Restructure switch_mm_irqs_off() Rik van Riel
2018-10-02 7:32 ` Peter Zijlstra
2018-09-26 3:58 ` [PATCH 3/7] smp: use __cpumask_set_cpu in on_each_cpu_cond Rik van Riel
2018-10-09 14:59 ` tip-bot for Rik van Riel [this message]
2018-09-26 3:58 ` [PATCH 4/7] smp,cpumask: introduce on_each_cpu_cond_mask Rik van Riel
2018-10-09 14:59 ` [tip:x86/mm] " tip-bot for Rik van Riel
2018-09-26 3:58 ` [PATCH 5/7] Add freed_tables argument to flush_tlb_mm_range Rik van Riel
2018-10-09 15:00 ` [tip:x86/mm] x86/mm/tlb: " tip-bot for Rik van Riel
2018-09-26 3:58 ` [PATCH 6/7] Add freed_tables element to flush_tlb_info Rik van Riel
2018-10-09 15:00 ` [tip:x86/mm] x86/mm/tlb: " tip-bot for Rik van Riel
2018-09-26 3:58 ` [PATCH 7/7] x86/mm/tlb: Make lazy TLB mode lazier Rik van Riel
2018-10-01 16:07 ` Peter Zijlstra
2018-10-09 15:01 ` [tip:x86/mm] " tip-bot for Rik van Riel
2018-10-01 16:09 ` [PATCH v2 0/7] x86/mm/tlb: make lazy TLB mode even lazier Peter Zijlstra
2018-10-02 7:44 ` Peter Zijlstra
2018-10-02 13:41 ` Rik van Riel
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