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(parent: 62217be) | patch
parisc: Drop LDCW barrier in CAS code when running UP
authorHelge Deller <deller@gmx.de>
Tue, 7 May 2019 18:19:05 +0000 (20:19 +0200)
committerHelge Deller <deller@gmx.de>
Fri, 10 May 2019 19:00:24 +0000 (21:00 +0200)
commite6eb5fe9123f05dcbf339ae5c0b6d32fcc0685d5
treeaf8322072981c930ac0ac33e62ee5b6d0732fc95tree | snapshot
parent62217beb394e654bbd2bb87c533dadd2d8bf62c6commit | diff
parisc: Drop LDCW barrier in CAS code when running UP

When running an SMP kernel on a single-CPU machine, we can speed up the
CAS code by replacing the LDCW sync barrier with NOP.

Signed-off-by: Helge Deller <deller@gmx.de>
arch/parisc/kernel/syscall.S diff | blob | history
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