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authorRabin Vincent <rabin@rab.in>2010-11-06 13:33:53 -0400
committerRabin Vincent <rabin@rab.in>2010-11-19 11:13:28 -0500
commit0e341af835fdf553820a1fa98341b93ab32ce466 (patch)
tree633b4088fdf119931a5a3039e6b83bc1b9245a42
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>
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/Kconfig.debug2
2 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 8ae3d48d504c..bd620a481bee 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -14,6 +14,7 @@ config ARM
14 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) 14 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
15 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) 15 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
16 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) 16 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
17 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
17 select HAVE_GENERIC_DMA_COHERENT 18 select HAVE_GENERIC_DMA_COHERENT
18 select HAVE_KERNEL_GZIP 19 select HAVE_KERNEL_GZIP
19 select HAVE_KERNEL_LZO 20 select HAVE_KERNEL_LZO
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 2fd0b99afc4b..eac62085f5b2 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -23,7 +23,7 @@ config STRICT_DEVMEM
23config FRAME_POINTER 23config FRAME_POINTER
24 bool 24 bool
25 depends on !THUMB2_KERNEL 25 depends on !THUMB2_KERNEL
26 default y if !ARM_UNWIND 26 default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
27 help 27 help
28 If you say N here, the resulting kernel will be slightly smaller and 28 If you say N here, the resulting kernel will be slightly smaller and
29 faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled, 29 faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,