[PATCH v3 17/21] powerpc: Add kconfig option to use jump labels for cpu/mmu_has_feature()

Michael Ellerman mpe at ellerman.id.au
Thu Jul 28 00:18:13 AEST 2016

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 at ellerman.id.au>
 arch/powerpc/Kconfig.debug | 9 +++++++++
 1 file changed, 9 insertions(+)

v3: New.

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index cfe08eab90c6..2512dac77adb 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
+	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.
 	bool "Run self-tests of the feature-fixup code"
 	depends on DEBUG_KERNEL

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