linux-kernel - [PATCH 4.4 v1 06/17] powerpc: Adjust system

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Message-Id: <1739170545-25011-7-git-send-email-kazuhiro3.hayashi@toshiba.co.jp>
Date: Mon, 10 Feb 2025 15:55:34 +0900
From: Kazuhiro Hayashi <kazuhiro3.hayashi@...hiba.co.jp>
To: linux-kernel@...r.kernel.org, linux-rt-devel@...ts.linux.dev,
        cip-dev@...ts.cip-project.org
Cc: bigeasy@...utronix.de, tglx@...utronix.de, rostedt@...dmis.org,
        linux-rt-users@...r.kernel.org, pavel@...x.de
Subject: [PATCH 4.4 v1 06/17] powerpc: Adjust system_state check

From: Thomas Gleixner <tglx@...utronix.de>

commit a8fcfc1917681ba1ccc23a429543a67aad8bfd00 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_generic_cpu_bootable() to handle the
extra states.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Michael Ellerman <mpe@...erman.id.au>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: linuxppc-dev@...ts.ozlabs.org
Link: http://lkml.kernel.org/r/20170516184735.359536998@linutronix.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Kazuhiro Hayashi <kazuhiro3.hayashi@...hiba.co.jp>
---
 arch/powerpc/kernel/smp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 19ba60ab1807..5dff1a750e49 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -94,7 +94,7 @@ int smp_generic_cpu_bootable(unsigned int nr)
 	/* Special case - we inhibit secondary thread startup
 	 * during boot if the user requests it.
 	 */
-	if (system_state == SYSTEM_BOOTING && cpu_has_feature(CPU_FTR_SMT)) {
+	if (system_state < SYSTEM_RUNNING && cpu_has_feature(CPU_FTR_SMT)) {
 		if (!smt_enabled_at_boot && cpu_thread_in_core(nr) != 0)
 			return 0;
 		if (smt_enabled_at_boot
-- 
2.30.2