s390/qdio: use atomic_cmpxchg

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qdio uses atomic_read to find an unused indicator and atomic_set to
flag it as used. This could lead to multiple users getting the same
indicator. Use atomic_cmpxchg instead.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Sebastian Ott 2017-10-26 16:36:45 +02:00 • committed by Martin Schwidefsky

parent 2a2d7befd4

commit 648a6f4495

1 changed files with 1 additions and 3 deletions

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drivers/s390/cio/qdio_thinint.c

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