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authorSrikar Dronamraju <srikar@linux.vnet.ibm.com>2019-12-05 14:02:18 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2019-12-13 21:07:45 +1100
commit656c21d6af5d9279dd7b51ca7a4a71008127044b (patch)
tree4c68f89be4f658b948b21fb51cd92d6e119273af /arch/powerpc
parent14c73bd344da60abaf7da3ea2e7733ddda35bbac (diff)
powerpc/shared: Use static key to detect shared processor
With the static key shared processor available, is_shared_processor() can return without having to query the lppaca structure. Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: Phil Auld <pauld@redhat.com> Acked-by: Waiman Long <longman@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191213035036.6913-2-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/include/asm/spinlock.h9
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
index cac95a3f30c2..1b55fc08f853 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++ b/arch/powerpc/include/asm/spinlock.h
@@ -112,13 +112,8 @@ static inline void splpar_rw_yield(arch_rwlock_t *lock) {};
static inline bool is_shared_processor(void)
{
-/*
- * LPPACA is only available on Pseries so guard anything LPPACA related to
- * allow other platforms (which include this common header) to compile.
- */
-#ifdef CONFIG_PPC_PSERIES
- return (IS_ENABLED(CONFIG_PPC_SPLPAR) &&
- lppaca_shared_proc(local_paca->lppaca_ptr));
+#ifdef CONFIG_PPC_SPLPAR
+ return static_branch_unlikely(&shared_processor);
#else
return false;
#endif