powerpc: Add kconfig option to use jump labels for cpu/mmu_has_feature()

Add a kconfig option to control whether we use jump label for the
cpu/mmu_has_feature() checks. Currently this does nothing, but we will
enabled it in the subsequent patches.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 171047822b56..36d7e345f599 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -60,6 +60,15 @@ config CODE_PATCHING_SELFTEST
         depends on DEBUG_KERNEL
         default n
 
+config JUMP_LABEL_FEATURE_CHECKS
+        bool "Enable use of jump label for cpu/mmu_has_feature()"
+        depends on JUMP_LABEL
+        default y
+        help
+          Selecting this options enables use of jump labels for some internal
+          feature checks. This should generate more optimal code for those
+          checks.
+
 config FTR_FIXUP_SELFTEST
         bool "Run self-tests of the feature-fixup code"
         depends on DEBUG_KERNEL