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| author |   Paul Mundt <lethal@linux-sh.org> | 2007-09-28 16:04:49 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2007-09-28 16:04:49 +0900 |
| commit | 836624619b98535079053920a29a7e474ac17cbc (patch) | |
| tree | beb3b4fc1b893b6a422be3645c3611b1c7adb456 /arch/sh/kernel/entry-common.S | |
| parent | sh: Follow gUSA preempt changes in __switch_to(). (diff) | |
| download | linux-dev-836624619b98535079053920a29a7e474ac17cbc.tar.xz linux-dev-836624619b98535079053920a29a7e474ac17cbc.zip | |
sh: Conditionalize gUSA support.
This conditionalizes gUSA support. gUSA is not supported on
SMP configurations, and it's not necessary there anyways due
to having other atomicity options (ie, movli.l/movco.l).
Anything implementing the LL/SC semantics (all SH-4A CPUs)
can switch to userspace atomicity implementations without
requiring gUSA. This is left default-enabled on all UP so
that glibc doesn't break.
Those that know what they are doing can disable this explicitly.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/entry-common.S')
| -rw-r--r-- | arch/sh/kernel/entry-common.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S index b46728027195..e0317ed080c3 100644 --- a/arch/sh/kernel/entry-common.S +++ b/arch/sh/kernel/entry-common.S @@ -176,7 +176,7 @@ work_notifysig: jmp @r1 lds r0, pr work_resched: -#ifndef CONFIG_PREEMPT +#if defined(CONFIG_GUSA) && !defined(CONFIG_PREEMPT) ! gUSA handling mov.l @(OFF_SP,r15), r0 ! get user space stack pointer mov r0, r1 |