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| author | David S. Miller <davem@davemloft.net> | 2012-10-28 07:00:41 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-10-28 07:00:41 +0100 |
| commit | e9b9eb59ffcdee09ec96b040f85c919618f4043e (patch) | |
| tree | 30f93cc20aa577ec5b12f609641fdf84d0bd5124 /arch/sparc/kernel/vmlinux.lds.S | |
| parent | sparc64: Fix cpu strand yielding. (diff) | |
| download | linux-e9b9eb59ffcdee09ec96b040f85c919618f4043e.tar.xz linux-e9b9eb59ffcdee09ec96b040f85c919618f4043e.zip | |
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>
Diffstat (limited to 'arch/sparc/kernel/vmlinux.lds.S')
| -rw-r--r-- | arch/sparc/kernel/vmlinux.lds.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/sparc/kernel/vmlinux.lds.S b/arch/sparc/kernel/vmlinux.lds.S index 89c2c29f154b..847f9f793618 100644 --- a/arch/sparc/kernel/vmlinux.lds.S +++ b/arch/sparc/kernel/vmlinux.lds.S @@ -132,6 +132,11 @@ SECTIONS *(.popc_6insn_patch) __popc_6insn_patch_end = .; } + .pause_patch : { + __pause_patch = .; + *(.pause_patch) + __pause_patch_end = .; + } PERCPU_SECTION(SMP_CACHE_BYTES) . = ALIGN(PAGE_SIZE); |