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(parent: 270c10e) | patch
sparc64: Use pause instruction when available.
authorDavid S. Miller <davem@davemloft.net>
Sun, 28 Oct 2012 06:00:41 +0000 (23:00 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sun, 28 Oct 2012 06:00:41 +0000 (23:00 -0700)
commite9b9eb59ffcdee09ec96b040f85c919618f4043e
tree30f93cc20aa577ec5b12f609641fdf84d0bd5124tree | snapshot (tar.gz zip)
parent270c10e00a1e557e068803a22e0556281ceb1830commit | diff
sparc64: Use pause instruction when available.

In atomic backoff and cpu_relax(), use the pause instruction
found on SPARC-T4 and later.

It makes the cpu strand unselectable for the given number of
cycles, unless an intervening disrupting trap occurs.

Signed-off-by: David S. Miller <davem@davemloft.net>
arch/sparc/include/asm/backoff.h diff | blob | blame | history
arch/sparc/include/asm/processor_64.h diff | blob | blame | history
arch/sparc/kernel/entry.h diff | blob | blame | history
arch/sparc/kernel/setup_64.c diff | blob | blame | history
arch/sparc/kernel/vmlinux.lds.S diff | blob | blame | history