Messages in this thread | | | From | Phil Auld <> | Subject | [PATCH v4 0/2] cpuhp: fix some st->target issues | Date | Thu, 21 Jul 2022 10:28:50 -0400 |
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Fix a couple of 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.
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.
Phil Auld (2): cpuhp: make target_store() a nop when target == state cpuhp: Set cpuhp target for boot cpu
kernel/cpu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
-- 2.31.1
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