diff mbox series

[2/2] powerpc/shared: Use static key to detect shared processor

Message ID 20191204134459.22470-2-srikar@linux.vnet.ibm.com (mailing list archive)
State Superseded
Headers show
Series [1/2] powerpc/vcpu: Assume dedicated processors as non-preempt | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (567dea0e848944848650d7fd27699e2de5d49353)
snowpatch_ozlabs/build-ppc64le success Build succeeded
snowpatch_ozlabs/build-ppc64be success Build succeeded
snowpatch_ozlabs/build-ppc64e success Build succeeded
snowpatch_ozlabs/build-pmac32 success Build succeeded
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 11 lines checked
snowpatch_ozlabs/needsstable success Patch has no Fixes tags

Commit Message

Srikar Dronamraju Dec. 4, 2019, 1:44 p.m. UTC
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>
---
 arch/powerpc/include/asm/spinlock.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
index 866f6ca0427a..699eb306a835 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++ b/arch/powerpc/include/asm/spinlock.h
@@ -115,9 +115,8 @@  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));
+#if defined(CONFIG_PPC_PSERIES) && defined(CONFIG_PPC_SPLPAR)
+	return static_branch_unlikely(&shared_processor);
 #else
 	return false;
 #endif