[S390] atomic ops: add effecient atomic64 support for 31 bit

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Use compare double and swap to implement efficient atomic64 ops for 31 bit.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2009-09-11 10:28:34 +02:00 • committed by Martin Schwidefsky

parent 6ac2a4ddd1

commit 1275105851

2 changed files with 127 additions and 38 deletions

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1

arch/s390/Kconfig

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170

arch/s390/include/asm/atomic.h

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