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[4.4,v1,03/17] arm64: Adjust system_state check

Message ID 1739170545-25011-4-git-send-email-kazuhiro3.hayashi@toshiba.co.jp
State New
Headers show
Series Backport fixes that depends on SYSTEM_SCHEDULING | expand

Commit Message

Kazuhiro Hayashi Feb. 10, 2025, 6:55 a.m. UTC 
From: Thomas Gleixner <tglx@linutronix.de>

commit ef284f5ca5f102bf855e599305c0c16d6e844635 upstream.

To enable smp_processor_id() and might_sleep() debug checks earlier, it's
required to add system states between SYSTEM_BOOTING and SYSTEM_RUNNING.

Adjust the system_state check in smp_send_stop() to handle the extra states.

Conflicts: arch/arm64/kernel/smp.c
82611c14 moves per-CPU stop message from ipi_cpu_stop() to smp_send_stop(),
but no change in checking system_state condition.
Apply the change to ipi_cpu_stop() instead.

Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Deacon <will.deacon@arm.com>
Link: http://lkml.kernel.org/r/20170516184735.112589728@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Kazuhiro Hayashi <kazuhiro3.hayashi@toshiba.co.jp>
---
 arch/arm64/kernel/smp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
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Patch

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 36182dafd63c..9b21b6ccc3f1 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -685,8 +685,7 @@  static DEFINE_RAW_SPINLOCK(stop_lock);
  */
 static void ipi_cpu_stop(unsigned int cpu)
 {
-	if (system_state == SYSTEM_BOOTING ||
-	    system_state == SYSTEM_RUNNING) {
+	if (system_state <= SYSTEM_RUNNING) {
 		raw_spin_lock(&stop_lock);
 		pr_crit("CPU%u: stopping\n", cpu);
 		dump_stack();