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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2006-08-24 13:29:33 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2006-09-20 14:01:16 +1000 |
| commit | 4f896e53eea70013fa48d0d8662680cf8aae8a43 (patch) | |
| tree | 4a22e8033ac46f4a801e79e8002b60d792efd6cf /arch/powerpc/lib/locks.c | |
| parent | 7dcd86e14319f4ceab883787ab2e00a5f860d14d (diff) | |
| download | kernel_samsung_smdk4412-4f896e53eea70013fa48d0d8662680cf8aae8a43.zip kernel_samsung_smdk4412-4f896e53eea70013fa48d0d8662680cf8aae8a43.tar.gz kernel_samsung_smdk4412-4f896e53eea70013fa48d0d8662680cf8aae8a43.tar.bz2 | |
[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.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c index 077bed7..80b482c 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 |