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authorStephen Rothwell <sfr@canb.auug.org.au>2006-08-24 13:29:33 +1000
committerStephen Rothwell <sfr@canb.auug.org.au>2006-09-20 14:01:16 +1000
commit4f896e53eea70013fa48d0d8662680cf8aae8a43 (patch)
tree4a22e8033ac46f4a801e79e8002b60d792efd6cf /arch/powerpc/lib/locks.c
parent7dcd86e14319f4ceab883787ab2e00a5f860d14d (diff)
[POWERPC] make spinlocks work in a combined kernel
If we build a pSeries/iSeries combined kernel, we will need this. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'arch/powerpc/lib/locks.c')
-rw-r--r--arch/powerpc/lib/locks.c27
1 files changed, 13 insertions, 14 deletions
diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c
index 077bed7dc52..80b482ca30d 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -23,6 +23,7 @@
#include <asm/hvcall.h>
#include <asm/iseries/hv_call.h>
#include <asm/smp.h>
+#include <asm/firmware.h>
void __spin_yield(raw_spinlock_t *lock)
{
@@ -39,13 +40,12 @@ void __spin_yield(raw_spinlock_t *lock)
rmb();
if (lock->slock != lock_value)
return; /* something has changed */
-#ifdef CONFIG_PPC_ISERIES
- HvCall2(HvCallBaseYieldProcessor, HvCall_YieldToProc,
- ((u64)holder_cpu << 32) | yield_count);
-#else
- plpar_hcall_norets(H_CONFER, get_hard_smp_processor_id(holder_cpu),
- yield_count);
-#endif
+ if (firmware_has_feature(FW_FEATURE_ISERIES))
+ HvCall2(HvCallBaseYieldProcessor, HvCall_YieldToProc,
+ ((u64)holder_cpu << 32) | yield_count);
+ else
+ plpar_hcall_norets(H_CONFER,
+ get_hard_smp_processor_id(holder_cpu), yield_count);
}
/*
@@ -69,13 +69,12 @@ void __rw_yield(raw_rwlock_t *rw)
rmb();
if (rw->lock != lock_value)
return; /* something has changed */
-#ifdef CONFIG_PPC_ISERIES
- HvCall2(HvCallBaseYieldProcessor, HvCall_YieldToProc,
- ((u64)holder_cpu << 32) | yield_count);
-#else
- plpar_hcall_norets(H_CONFER, get_hard_smp_processor_id(holder_cpu),
- yield_count);
-#endif
+ if (firmware_has_feature(FW_FEATURE_ISERIES))
+ HvCall2(HvCallBaseYieldProcessor, HvCall_YieldToProc,
+ ((u64)holder_cpu << 32) | yield_count);
+ else
+ plpar_hcall_norets(H_CONFER,
+ get_hard_smp_processor_id(holder_cpu), yield_count);
}
#endif