linux-kernel - [PATCH v5 0/2] cpuhp: fix some st->target issues

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Message-Id: <20221117162329.3164999-1-pauld@redhat.com>
Date:   Thu, 17 Nov 2022 11:23:27 -0500
From:   Phil Auld <pauld@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Valentin Schneider <vschneid@...hat.com>,
        Steven Price <steven.price@....com>,
        Mark Rutland <mark.rutland@....com>,
        Frederic Weisbecker <frederic@...nel.org>, pauld@...hat.com
Subject: [PATCH v5 0/2] cpuhp: fix some st->target issues

Fix a few cpuhp related issues.

The first prevents target_store() from calling cpu_down() when
target == state which prevents the cpu being incorrectly marked
as dying.  The second just makes the boot cpu have a valid cpuhp
target rather than 0 (CPU_OFFLINE) while being in state
CPU_ONLINE.

v3: Added code to make sure st->target == target in the nop case.

v4: Use WARN_ON in the case where state == target but st->target does
not.

v5: Fixed lowercase on first patch title and cleaned up cover letter.
Rebased on v6.1-rc5.

Phil Auld (2):
  cpuhp: Make target_store() a nop when target == state
  cpuhp: Set cpuhp target for boot cpu

 cpu.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

-- 
2.31.1