linux-kernel - [PATCH v2 0/2] cpuhp: fix some st->target issues

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Message-Id: <20220526160615.7976-1-pauld@redhat.com>
Date:   Thu, 26 May 2022 12:06:13 -0400
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>
Subject: [PATCH v2 0/2] cpuhp: fix some st->target issues

Several small fixes that clean up some cpuhp inconsistencies.
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.

A further issue which these two patches don't address is that
the cpuX/online file looks at the device->offline state and can
thus get out of sync with the actual cpuhp state if the cpuhp
target is used to change state.

Cheers,
Phil

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

 kernel/cpu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
2.18.0