s390/atomic: Implement arch_atomic_inc() / arch_atomic_dec()

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Implement arch_atomic_inc() / arch_atomic_dec() functions which result
in a single instruction if compiled for z196 or newer architectures.

Reduces the kernel image size by ~6K (defconfig):

bloat-o-meter:
add/remove: 0/0 grow/shrink: 12/1005 up/down: 106/-6404 (-6298)

Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

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Heiko Carstens 2024-12-04 12:30:58 +01:00 • committed by Alexander Gordeev

parent 7ad0075005

commit d809df72b5

1 changed files with 24 additions and 0 deletions

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arch/s390/include/asm/atomic.h

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