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authorPaul Mundt <lethal@linux-sh.org>2007-09-28 16:04:49 +0900
committerPaul Mundt <lethal@linux-sh.org>2007-09-28 16:04:49 +0900
commit836624619b98535079053920a29a7e474ac17cbc (patch)
treebeb3b4fc1b893b6a422be3645c3611b1c7adb456 /arch/sh/kernel/entry-common.S
parent995bb781d42441ed48517bc7ea6414c3df3386ef (diff)
downloadop-kernel-dev-836624619b98535079053920a29a7e474ac17cbc.zip
op-kernel-dev-836624619b98535079053920a29a7e474ac17cbc.tar.gz
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.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index b467280..e0317ed 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
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