linux-kernel - [PATCH 06/11] smp: Remove preempt_disable from smp_call

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Message-Id: <20260203112401.3889029-7-zhouchuyi@bytedance.com>
Date: Tue,  3 Feb 2026 19:23:56 +0800
From: "Chuyi Zhou" <zhouchuyi@...edance.com>
To: <tglx@...utronix.de>, <mingo@...hat.com>, <luto@...nel.org>, 
	<peterz@...radead.org>, <paulmck@...nel.org>, <muchun.song@...ux.dev>, 
	<bp@...en8.de>, <dave.hansen@...ux.intel.com>
Cc: <linux-kernel@...r.kernel.org>, "Chuyi Zhou" <zhouchuyi@...edance.com>
Subject: [PATCH 06/11] smp: Remove preempt_disable from smp_call_function

Now smp_call_function_many_cond() internally handles the preemption logic,
so smp_call_function() does not need to explicitly disable preemption.
Remove preempt_{enable, disable} from smp_call_function().

Signed-off-by: Chuyi Zhou <zhouchuyi@...edance.com>
---
 kernel/smp.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/smp.c b/kernel/smp.c
index af9cee7d4939..088b581003fb 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -977,9 +977,8 @@ EXPORT_SYMBOL(smp_call_function_many);
  */
 void smp_call_function(smp_call_func_t func, void *info, int wait)
 {
-	preempt_disable();
-	smp_call_function_many(cpu_online_mask, func, info, wait);
-	preempt_enable();
+	smp_call_function_many_cond(cpu_online_mask, func, info,
+			wait ? SCF_WAIT : 0, NULL);
 }
 EXPORT_SYMBOL(smp_call_function);
 
-- 
2.20.1