linux-kernel - [PATCH v2 3/8] smp: move num_other_online

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251118025015.42491-4-cuiyunhui@bytedance.com>
Date: Tue, 18 Nov 2025 10:50:10 +0800
From: Yunhui Cui <cuiyunhui@...edance.com>
To: conor@...nel.org,
	paul.walmsley@...ive.com,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	alex@...ti.fr,
	cuiyunhui@...edance.com,
	luxu.kernel@...edance.com,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	jassisinghbrar@...il.com,
	conor.dooley@...rochip.com,
	valentina.fernandezalanis@...rochip.com,
	catalin.marinas@....com,
	will@...nel.org,
	maz@...nel.org,
	timothy.hayes@....com,
	lpieralisi@...nel.org,
	arnd@...db.de,
	kees@...nel.org,
	tglx@...utronix.de,
	viresh.kumar@...aro.org,
	boqun.feng@...il.com,
	linux-arm-kernel@...ts.infradead.org,
	cleger@...osinc.com,
	atishp@...osinc.com,
	ajones@...tanamicro.com
Subject: [PATCH v2 3/8] smp: move num_other_online_cpus() into smp.h

Remove duplicate definitions from arm64/riscv, add unified
implementation in smp.h.

Signed-off-by: Yunhui Cui <cuiyunhui@...edance.com>
---
 arch/arm64/kernel/smp.c | 11 -----------
 arch/riscv/kernel/smp.c | 11 -----------
 include/linux/smp.h     | 11 +++++++++++
 3 files changed, 11 insertions(+), 22 deletions(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 68cea3a4a35ca..2d1e7839dc9b0 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -1171,17 +1171,6 @@ void tick_broadcast(const struct cpumask *mask)
 }
 #endif
 
-/*
- * The number of CPUs online, not counting this CPU (which may not be
- * fully online and so not counted in num_online_cpus()).
- */
-static inline unsigned int num_other_online_cpus(void)
-{
-	unsigned int this_cpu_online = cpu_online(smp_processor_id());
-
-	return num_online_cpus() - this_cpu_online;
-}
-
 void smp_send_stop(void)
 {
 	static unsigned long stop_in_progress;
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index 9dbcb9a06a96d..669325e68a21a 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -272,17 +272,6 @@ void smp_send_stop(void)
 }
 
 #ifdef CONFIG_KEXEC_CORE
-/*
- * The number of CPUs online, not counting this CPU (which may not be
- * fully online and so not counted in num_online_cpus()).
- */
-static inline unsigned int num_other_online_cpus(void)
-{
-	unsigned int this_cpu_online = cpu_online(smp_processor_id());
-
-	return num_online_cpus() - this_cpu_online;
-}
-
 void crash_smp_send_stop(void)
 {
 	static int cpus_stopped;
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 18e9c918325e5..5300c5c14232b 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -275,6 +275,17 @@ static inline int get_boot_cpu_id(void)
 #define get_cpu()		({ preempt_disable(); __smp_processor_id(); })
 #define put_cpu()		preempt_enable()
 
+/*
+ * The number of CPUs online, not counting this CPU (which may not be
+ * fully online and so not counted in num_online_cpus()).
+ */
+static inline unsigned int num_other_online_cpus(void)
+{
+	unsigned int this_cpu_online = cpu_online(smp_processor_id());
+
+	return num_online_cpus() - this_cpu_online;
+}
+
 /*
  * Callback to arch code if there's nosmp or maxcpus=0 on the
  * boot command line:
-- 
2.39.5