s390/ctlreg: return old register contents when changing bits

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Change local_ctl_set_bit() and local_ctl_clear_bit() so they return the
previous value of the to be changed control register. This is useful if a
bit is only changed temporarily and the previous content needs to be
restored.

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 2023-12-01 14:09:29 +01:00 • committed by Alexander Gordeev

parent 207022d39d

commit f88d368453

1 changed files with 14 additions and 10 deletions

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arch/s390/include/asm/ctlreg.h

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