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Message-Id: <1289067954-5080-6-git-send-email-rabin@rab.in> Date: Sat, 6 Nov 2010 23:55:54 +0530 From: Rabin Vincent <rabin@....in> To: linux-arm-kernel@...ts.infradead.org Cc: Steven Rostedt <rostedt@...dmis.org>, Frederic Weisbecker <fweisbec@...il.com>, Tim Bird <tim.bird@...sony.com>, linux-kernel@...r.kernel.org, Rabin Vincent <rabin@....in> Subject: [PATCH 6/6] 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 explicitly select FRAME_POINTER in FUNCTION_GRAPH_TRACER 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. Signed-off-by: Rabin Vincent <rabin@....in> --- arch/arm/Kconfig | 1 + kernel/trace/Kconfig | 1 + 2 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index a19a526..c5e96ff 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -14,6 +14,7 @@ config ARM select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) + select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL) select HAVE_GENERIC_DMA_COHERENT select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index e04b8bc..ff23dcf 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -141,6 +141,7 @@ config FUNCTION_TRACER config FUNCTION_GRAPH_TRACER bool "Kernel Function Graph Tracer" + select FRAME_POINTER if ARM_UNWIND depends on HAVE_FUNCTION_GRAPH_TRACER depends on FUNCTION_TRACER depends on !X86_32 || !CC_OPTIMIZE_FOR_SIZE -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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