powerpc: powernv: Annotate data races in opal events

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The kopald thread handles opal events as they appear, but by polling a
static bit-vector in last_outstanding_events. Annotate these data races
accordingly. We are not at risk of missing events, but use of READ_ONCE,
WRITE_ONCE will assist readers in seeing that kopald only consumes the
events it is aware of when it is scheduled. Also removes extraneous
KCSAN warnings.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230510033117.1395895-10-rmclure@linux.ibm.com

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Rohan McLure 2023-05-10 13:31:15 +10:00 • committed by Michael Ellerman

parent 86dacd967b

commit 331e2cad6d

1 changed files with 3 additions and 3 deletions

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arch/powerpc/platforms/powernv/opal-irqchip.c

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