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From: Qais Yousef <qais.yousef@arm.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, Qais Yousef <qais.yousef@arm.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Jiri Kosina <jkosina@suse.cz>,
	Nicholas Piggin <npiggin@gmail.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Ingo Molnar <mingo@kernel.org>,
	Eiichi Tsukata <devel@etsukata.com>,
	Zhenzhong Duan <zhenzhong.duan@oracle.com>,
	Nadav Amit <namit@vmware.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
	Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Russell King <linux@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org
Subject: [PATCH v4 02/17] smp: Create a new function to shutdown nonboot cpus
Date: Mon, 23 Mar 2020 13:50:55 +0000	[thread overview]
Message-ID: <20200323135110.30522-3-qais.yousef@arm.com> (raw)
In-Reply-To: <20200323135110.30522-1-qais.yousef@arm.com>

This function will be used later in machine_shutdown() for some archs.

disable_nonboot_cpus() is not safe to use when doing machine_down(),
because it relies on freeze_secondary_cpus() which in turn is
a suspend/resume related freeze and could abort if the logic detects any
pending activities that can prevent finishing the offlining process.

Signed-off-by: Qais Yousef <qais.yousef@arm.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Josh Poimboeuf <jpoimboe@redhat.com>
CC: "Peter Zijlstra (Intel)" <peterz@infradead.org>
CC: Jiri Kosina <jkosina@suse.cz>
CC: Nicholas Piggin <npiggin@gmail.com>
CC: Daniel Lezcano <daniel.lezcano@linaro.org>
CC: Ingo Molnar <mingo@kernel.org>
CC: Eiichi Tsukata <devel@etsukata.com>
CC: Zhenzhong Duan <zhenzhong.duan@oracle.com>
CC: Nadav Amit <namit@vmware.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
CC: Russell King <linux@armlinux.org.uk>
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will@kernel.org>
CC: linux-arm-kernel@lists.infradead.org
CC: linux-ia64@vger.kernel.org
CC: linux-kernel@vger.kernel.org
---
 include/linux/cpu.h |  2 ++
 kernel/cpu.c        | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index cf8cf38dca43..64a246e9c8db 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -120,6 +120,7 @@ extern void cpu_hotplug_enable(void);
 void clear_tasks_mm_cpumask(int cpu);
 int cpu_down(unsigned int cpu);
 int remove_cpu(unsigned int cpu);
+extern void smp_shutdown_nonboot_cpus(unsigned int primary_cpu);
 
 #else /* CONFIG_HOTPLUG_CPU */
 
@@ -131,6 +132,7 @@ static inline int  cpus_read_trylock(void) { return true; }
 static inline void lockdep_assert_cpus_held(void) { }
 static inline void cpu_hotplug_disable(void) { }
 static inline void cpu_hotplug_enable(void) { }
+static inline void smp_shutdown_nonboot_cpus(unsigned int primary_cpu) { }
 #endif	/* !CONFIG_HOTPLUG_CPU */
 
 /* Wrappers which go away once all code is converted */
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 069802f7010f..03c727195b65 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1069,6 +1069,48 @@ int remove_cpu(unsigned int cpu)
 }
 EXPORT_SYMBOL_GPL(remove_cpu);
 
+void smp_shutdown_nonboot_cpus(unsigned int primary_cpu)
+{
+	unsigned int cpu;
+	int error;
+
+	cpu_maps_update_begin();
+
+	/*
+	 * Make certain the cpu I'm about to reboot on is online.
+	 *
+	 * This is inline to what migrate_to_reboot_cpu() already do.
+	 */
+	if (!cpu_online(primary_cpu))
+		primary_cpu = cpumask_first(cpu_online_mask);
+
+	for_each_online_cpu(cpu) {
+		if (cpu == primary_cpu)
+			continue;
+
+		error = cpu_down_maps_locked(cpu, CPUHP_OFFLINE);
+		if (error) {
+			pr_err("Failed to offline CPU%d - error=%d",
+				cpu, error);
+			break;
+		}
+	}
+
+	/*
+	 * Ensure all but the reboot CPU are offline.
+	 */
+	BUG_ON(num_online_cpus() > 1);
+
+	/*
+	 * Make sure the CPUs won't be enabled by someone else after this
+	 * point. Kexec will reboot to a new kernel shortly resetting
+	 * everything along the way.
+	 */
+	cpu_hotplug_disabled++;
+
+	cpu_maps_update_done();
+}
+
 #else
 #define takedown_cpu		NULL
 #endif /*CONFIG_HOTPLUG_CPU*/
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Qais Yousef <qais.yousef@arm.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	linux-ia64@vger.kernel.org,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Peter Zijlstra \(Intel\)" <peterz@infradead.org>,
	Jiri Kosina <jkosina@suse.cz>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	linux-kernel@vger.kernel.org, Nicholas Piggin <npiggin@gmail.com>,
	Ingo Molnar <mingo@kernel.org>,
	Eiichi Tsukata <devel@etsukata.com>,
	Nadav Amit <namit@vmware.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Russell King <linux@armlinux.org.uk>,
	Will Deacon <will@kernel.org>, Qais Yousef <qais.yousef@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Zhenzhong Duan <zhenzhong.duan@oracle.com>
Subject: [PATCH v4 02/17] smp: Create a new function to shutdown nonboot cpus
Date: Mon, 23 Mar 2020 13:50:55 +0000	[thread overview]
Message-ID: <20200323135110.30522-3-qais.yousef@arm.com> (raw)
In-Reply-To: <20200323135110.30522-1-qais.yousef@arm.com>

This function will be used later in machine_shutdown() for some archs.

disable_nonboot_cpus() is not safe to use when doing machine_down(),
because it relies on freeze_secondary_cpus() which in turn is
a suspend/resume related freeze and could abort if the logic detects any
pending activities that can prevent finishing the offlining process.

Signed-off-by: Qais Yousef <qais.yousef@arm.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Josh Poimboeuf <jpoimboe@redhat.com>
CC: "Peter Zijlstra (Intel)" <peterz@infradead.org>
CC: Jiri Kosina <jkosina@suse.cz>
CC: Nicholas Piggin <npiggin@gmail.com>
CC: Daniel Lezcano <daniel.lezcano@linaro.org>
CC: Ingo Molnar <mingo@kernel.org>
CC: Eiichi Tsukata <devel@etsukata.com>
CC: Zhenzhong Duan <zhenzhong.duan@oracle.com>
CC: Nadav Amit <namit@vmware.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
CC: Russell King <linux@armlinux.org.uk>
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will@kernel.org>
CC: linux-arm-kernel@lists.infradead.org
CC: linux-ia64@vger.kernel.org
CC: linux-kernel@vger.kernel.org
---
 include/linux/cpu.h |  2 ++
 kernel/cpu.c        | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index cf8cf38dca43..64a246e9c8db 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -120,6 +120,7 @@ extern void cpu_hotplug_enable(void);
 void clear_tasks_mm_cpumask(int cpu);
 int cpu_down(unsigned int cpu);
 int remove_cpu(unsigned int cpu);
+extern void smp_shutdown_nonboot_cpus(unsigned int primary_cpu);
 
 #else /* CONFIG_HOTPLUG_CPU */
 
@@ -131,6 +132,7 @@ static inline int  cpus_read_trylock(void) { return true; }
 static inline void lockdep_assert_cpus_held(void) { }
 static inline void cpu_hotplug_disable(void) { }
 static inline void cpu_hotplug_enable(void) { }
+static inline void smp_shutdown_nonboot_cpus(unsigned int primary_cpu) { }
 #endif	/* !CONFIG_HOTPLUG_CPU */
 
 /* Wrappers which go away once all code is converted */
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 069802f7010f..03c727195b65 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1069,6 +1069,48 @@ int remove_cpu(unsigned int cpu)
 }
 EXPORT_SYMBOL_GPL(remove_cpu);
 
+void smp_shutdown_nonboot_cpus(unsigned int primary_cpu)
+{
+	unsigned int cpu;
+	int error;
+
+	cpu_maps_update_begin();
+
+	/*
+	 * Make certain the cpu I'm about to reboot on is online.
+	 *
+	 * This is inline to what migrate_to_reboot_cpu() already do.
+	 */
+	if (!cpu_online(primary_cpu))
+		primary_cpu = cpumask_first(cpu_online_mask);
+
+	for_each_online_cpu(cpu) {
+		if (cpu == primary_cpu)
+			continue;
+
+		error = cpu_down_maps_locked(cpu, CPUHP_OFFLINE);
+		if (error) {
+			pr_err("Failed to offline CPU%d - error=%d",
+				cpu, error);
+			break;
+		}
+	}
+
+	/*
+	 * Ensure all but the reboot CPU are offline.
+	 */
+	BUG_ON(num_online_cpus() > 1);
+
+	/*
+	 * Make sure the CPUs won't be enabled by someone else after this
+	 * point. Kexec will reboot to a new kernel shortly resetting
+	 * everything along the way.
+	 */
+	cpu_hotplug_disabled++;
+
+	cpu_maps_update_done();
+}
+
 #else
 #define takedown_cpu		NULL
 #endif /*CONFIG_HOTPLUG_CPU*/
-- 
2.17.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Qais Yousef <qais.yousef@arm.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, Qais Yousef <qais.yousef@arm.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Jiri Kosina <jkosina@suse.cz>,
	Nicholas Piggin <npiggin@gmail.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Ingo Molnar <mingo@kernel.org>,
	Eiichi Tsukata <devel@etsukata.com>,
	Zhenzhong Duan <zhenzhong.duan@oracle.com>,
	Nadav Amit <namit@vmware.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
	Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Russell King <linux@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org
Subject: [PATCH v4 02/17] smp: Create a new function to shutdown nonboot cpus
Date: Mon, 23 Mar 2020 13:50:55 +0000	[thread overview]
Message-ID: <20200323135110.30522-3-qais.yousef@arm.com> (raw)
In-Reply-To: <20200323135110.30522-1-qais.yousef@arm.com>

This function will be used later in machine_shutdown() for some archs.

disable_nonboot_cpus() is not safe to use when doing machine_down(),
because it relies on freeze_secondary_cpus() which in turn is
a suspend/resume related freeze and could abort if the logic detects any
pending activities that can prevent finishing the offlining process.

Signed-off-by: Qais Yousef <qais.yousef@arm.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Josh Poimboeuf <jpoimboe@redhat.com>
CC: "Peter Zijlstra (Intel)" <peterz@infradead.org>
CC: Jiri Kosina <jkosina@suse.cz>
CC: Nicholas Piggin <npiggin@gmail.com>
CC: Daniel Lezcano <daniel.lezcano@linaro.org>
CC: Ingo Molnar <mingo@kernel.org>
CC: Eiichi Tsukata <devel@etsukata.com>
CC: Zhenzhong Duan <zhenzhong.duan@oracle.com>
CC: Nadav Amit <namit@vmware.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
CC: Russell King <linux@armlinux.org.uk>
CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will@kernel.org>
CC: linux-arm-kernel@lists.infradead.org
CC: linux-ia64@vger.kernel.org
CC: linux-kernel@vger.kernel.org
---
 include/linux/cpu.h |  2 ++
 kernel/cpu.c        | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index cf8cf38dca43..64a246e9c8db 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -120,6 +120,7 @@ extern void cpu_hotplug_enable(void);
 void clear_tasks_mm_cpumask(int cpu);
 int cpu_down(unsigned int cpu);
 int remove_cpu(unsigned int cpu);
+extern void smp_shutdown_nonboot_cpus(unsigned int primary_cpu);
 
 #else /* CONFIG_HOTPLUG_CPU */
 
@@ -131,6 +132,7 @@ static inline int  cpus_read_trylock(void) { return true; }
 static inline void lockdep_assert_cpus_held(void) { }
 static inline void cpu_hotplug_disable(void) { }
 static inline void cpu_hotplug_enable(void) { }
+static inline void smp_shutdown_nonboot_cpus(unsigned int primary_cpu) { }
 #endif	/* !CONFIG_HOTPLUG_CPU */
 
 /* Wrappers which go away once all code is converted */
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 069802f7010f..03c727195b65 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1069,6 +1069,48 @@ int remove_cpu(unsigned int cpu)
 }
 EXPORT_SYMBOL_GPL(remove_cpu);
 
+void smp_shutdown_nonboot_cpus(unsigned int primary_cpu)
+{
+	unsigned int cpu;
+	int error;
+
+	cpu_maps_update_begin();
+
+	/*
+	 * Make certain the cpu I'm about to reboot on is online.
+	 *
+	 * This is inline to what migrate_to_reboot_cpu() already do.
+	 */
+	if (!cpu_online(primary_cpu))
+		primary_cpu = cpumask_first(cpu_online_mask);
+
+	for_each_online_cpu(cpu) {
+		if (cpu = primary_cpu)
+			continue;
+
+		error = cpu_down_maps_locked(cpu, CPUHP_OFFLINE);
+		if (error) {
+			pr_err("Failed to offline CPU%d - error=%d",
+				cpu, error);
+			break;
+		}
+	}
+
+	/*
+	 * Ensure all but the reboot CPU are offline.
+	 */
+	BUG_ON(num_online_cpus() > 1);
+
+	/*
+	 * Make sure the CPUs won't be enabled by someone else after this
+	 * point. Kexec will reboot to a new kernel shortly resetting
+	 * everything along the way.
+	 */
+	cpu_hotplug_disabled++;
+
+	cpu_maps_update_done();
+}
+
 #else
 #define takedown_cpu		NULL
 #endif /*CONFIG_HOTPLUG_CPU*/
-- 
2.17.1

  parent reply	other threads:[~2020-03-23 13:51 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 13:50 [PATCH v4 00/17] Convert cpu_up/down to device_online/offline Qais Yousef
2020-03-23 13:50 ` Qais Yousef
2020-03-23 13:50 ` [Xen-devel] " Qais Yousef
2020-03-23 13:50 ` Qais Yousef
2020-03-23 13:50 ` Qais Yousef
2020-03-23 13:50 ` Qais Yousef
2020-03-23 13:50 ` [PATCH v4 01/17] cpu: Add new {add,remove}_cpu() functions Qais Yousef
2020-03-23 13:50   ` [Xen-devel] [PATCH v4 01/17] cpu: Add new {add, remove}_cpu() functions Qais Yousef
2020-03-23 13:50   ` [PATCH v4 01/17] cpu: Add new {add,remove}_cpu() functions Qais Yousef
2020-03-23 13:50   ` Qais Yousef
2020-03-23 13:50   ` Qais Yousef
2020-03-23 15:00   ` Paul E. McKenney
2020-03-23 15:00     ` Paul E. McKenney
2020-03-23 15:00     ` Paul E. McKenney
2020-03-23 15:00     ` Paul E. McKenney
2020-03-23 15:00     ` Paul E. McKenney
2020-03-25 12:06   ` [tip: smp/core] cpu/hotplug: " tip-bot2 for Qais Yousef
2020-03-23 13:50 ` Qais Yousef [this message]
2020-03-23 13:50   ` [PATCH v4 02/17] smp: Create a new function to shutdown nonboot cpus Qais Yousef
2020-03-23 13:50   ` Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] cpu/hotplug: " tip-bot2 for Qais Yousef
2020-03-23 13:50 ` [PATCH v4 03/17] ia64: Replace cpu_down with smp_shutdown_nonboot_cpus() Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] ia64: Replace cpu_down() " tip-bot2 for Qais Yousef
2020-03-23 13:50 ` [PATCH v4 04/17] arm: Don't use disable_nonboot_cpus() Qais Yousef
2020-03-23 13:50   ` Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] ARM: " tip-bot2 for Qais Yousef
2020-03-23 13:50 ` [PATCH v4 05/17] arm: Use reboot_cpu instead of hardcoding it to 0 Qais Yousef
2020-03-23 13:50   ` Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] ARM: " tip-bot2 for Qais Yousef
2020-03-23 13:50 ` [PATCH v4 06/17] arm64: Don't use disable_nonboot_cpus() Qais Yousef
2020-03-23 13:50   ` Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] " tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 07/17] arm64: Use reboot_cpu instead of hardconding it to 0 Qais Yousef
2020-03-23 13:51   ` Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] " tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 08/17] arm64: hibernate.c: Create a new function to handle cpu_up(sleep_cpu) Qais Yousef
2020-03-23 13:51   ` Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] arm64: hibernate: Use bringup_hibernate_cpu() tip-bot2 for Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] cpu/hotplug: Provide bringup_hibernate_cpu() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 09/17] x86: Replace cpu_up/down with add/remove_cpu Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] x86/smp: Replace cpu_up/down() with add/remove_cpu() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 10/17] powerpc: Replace cpu_up/down with add/remove_cpu Qais Yousef
2020-03-23 13:51   ` Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] powerpc: Replace cpu_up/down() with add/remove_cpu() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 11/17] sparc: Replace cpu_up/down with add/remove_cpu Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] sparc: Replace cpu_up/down() with add/remove_cpu() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 12/17] parisc: Replace cpu_up/down with add/remove_cpu Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] parisc: Replace cpu_up/down() with add/remove_cpu() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 13/17] driver: xen: Replace cpu_up/down with device_online/offline Qais Yousef
2020-03-23 13:51   ` [Xen-devel] " Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] xen/cpuhotplug: Replace cpu_up/down() with device_online/offline() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 14/17] firmware: psci: Replace cpu_up/down with add/remove_cpu Qais Yousef
2020-03-23 13:51   ` Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] firmware: psci: Replace cpu_up/down() with add/remove_cpu() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 15/17] torture: Replace cpu_up/down with add/remove_cpu Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] torture: Replace cpu_up/down() with add/remove_cpu() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 16/17] smp: Create a new function to bringup nonboot cpus online Qais Yousef
2020-03-25 12:06   ` [tip: smp/core] cpu/hotplug: Move bringup of secondary CPUs out of smp_init() tip-bot2 for Qais Yousef
2020-03-23 13:51 ` [PATCH v4 17/17] cpu: Hide cpu_up/down Qais Yousef
2020-03-25 12:05   ` [tip: smp/core] cpu/hotplug: Hide cpu_up/down() tip-bot2 for Qais Yousef

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