s390/vtime: Use __this_cpu_read() / get rid of READ_ONCE()

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do_account_vtime() runs always with interrupts disabled, therefore use
__this_cpu_read() instead of this_cpu_read() to get rid of a pointless
preempt_disable() / preempt_enable() pair.

Also there are no concurrent writers to the cpu time accounting fields
in lowcore. Therefore get rid of READ_ONCE() usages.

Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Heiko Carstens 2026-02-18 15:20:10 +01:00 • committed by Vasily Gorbik

parent d8b5cf9c63

commit e282ccd308

1 changed files with 7 additions and 14 deletions

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arch/s390/kernel/vtime.c

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