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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>
This commit is contained in:
Michael Ellerman 2016-07-27 22:46:29 +10:00
parent b92a226e52
commit bfbfc8a43c
1 changed files with 9 additions and 0 deletions
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arch/powerpc/Kconfig.debug
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@ -60,6 +60,15 @@ config CODE_PATCHING_SELFTEST
depends on DEBUG_KERNEL depends on DEBUG_KERNEL
default n 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 config FTR_FIXUP_SELFTEST
bool "Run self-tests of the feature-fixup code" bool "Run self-tests of the feature-fixup code"
depends on DEBUG_KERNEL depends on DEBUG_KERNEL