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authorRabin Vincent <rabin@rab.in>2010-11-06 23:03:53 +0530
committerRabin Vincent <rabin@rab.in>2010-11-19 21:43:28 +0530
commit0e341af835fdf553820a1fa98341b93ab32ce466 (patch)
tree633b4088fdf119931a5a3039e6b83bc1b9245a42 /arch/arm/Kconfig.debug
parentdd686eb13959e49a1112fd608c124ab711050582 (diff)
ARM: ftrace: enable function graph tracer
Add the options to enable the function graph tracer on ARM. Function graph tracer support requires frame pointers, so exclude Thumb-2 and also make sure FRAME_POINTER gets enabled when FUNCTION_GRAPH_TRACER is used, since FUNCTION_TRACER doesn't "select FRAME_POINTER" when ARM_UNWIND is used. Therefore, with GCC 4.4.0+, you get plain function tracing without frame pointers, but you'll need them if you want function graph tracing. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Rabin Vincent <rabin@rab.in>
Diffstat (limited to 'arch/arm/Kconfig.debug')
-rw-r--r--arch/arm/Kconfig.debug2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 2fd0b99afc4..eac62085f5b 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -23,7 +23,7 @@ config STRICT_DEVMEM
config FRAME_POINTER
bool
depends on !THUMB2_KERNEL
- default y if !ARM_UNWIND
+ default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
help
If you say N here, the resulting kernel will be slightly smaller and
faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,