arch/parisc/kernel/syscall.S · 271c29a17fadd3eabbfe63f13bb49dfb6c9d872d · Tobias Schramm / linux-pinebook-pro

5 years ago

parisc: Drop LDCW barrier in CAS code when running UP · e6eb5fe9

Helge Deller authored 5 years ago


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>

e6eb5fe9

History

parisc: Drop LDCW barrier in CAS code when running UP

Helge Deller authored 5 years ago


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>

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syscall.S 26.89 KiB

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