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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-07-23 12:12:43 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2016-08-01 04:15:06 +0300
commitc812c7d8f1470ac9c8aa6d7e29b56e5845ee05fc (patch)
tree9df953d954d85946488f41cbd202865535805eb4 /arch/powerpc/Kconfig.debug
parentc12e6f24d4137822d5019c1f78ac65bd27a3447d (diff)
downloadlinux-c812c7d8f1470ac9c8aa6d7e29b56e5845ee05fc.tar.xz
powerpc/mm: Catch usage of cpu/mmu_has_feature() before jump label init
This allows us to catch incorrect usage of cpu_has_feature() and mmu_has_feature() prior to jump labels being initialised. mpe: Use printk() and dump_stack() rather than WARN_ON(), because WARN_ON() may not work this early in boot. Rename the Kconfig. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/Kconfig.debug')
-rw-r--r--arch/powerpc/Kconfig.debug10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 36d7e345f599..63292f64b25a 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -69,6 +69,16 @@ config JUMP_LABEL_FEATURE_CHECKS
feature checks. This should generate more optimal code for those
checks.
+config JUMP_LABEL_FEATURE_CHECK_DEBUG
+ bool "Do extra check on feature fixup calls"
+ depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
+ default n
+ help
+ This tries to catch incorrect usage of cpu_has_feature() and
+ mmu_has_feature() in the code.
+
+ If you don't know what this means, say N.
+
config FTR_FIXUP_SELFTEST
bool "Run self-tests of the feature-fixup code"
depends on DEBUG_KERNEL