Commit 07c4cc1c authored Oct 23, 2008 by Steven Rostedt Committed by Ingo Molnar Oct 23, 2008

ftrace: disable dynamic ftrace for all archs that use daemon



The ftrace daemon is complex and can cause nasty races if something goes
wrong. Since it affects all of the kernel, this patch disables dynamic
ftrace from any arch that depends on the daemon. Until the archs are
ported over to the new MCOUNT_RECORD method, I am disabling dynamic
ftrace from them.

Note: I am leaving in the arch/<arch>/kernel/ftrace.c code alone since
that can be used when the arch is ported to MCOUNT_RECORD. To port
the arch to MCOUNT_RECORD, the scripts/recordmcount.pl needs to be
updated. I will make that easier to do for 2.6.29. For 28, we will keep
the archs disabled.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 6912896e

arch/arm/Kconfig

+0 −1

Original line number	Diff line number	Diff line
		@@ -17,7 +17,6 @@ config ARM
		select HAVE_KPROBES if (!XIP_KERNEL)
		select HAVE_KRETPROBES if (HAVE_KPROBES)
		select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
		select HAVE_DYNAMIC_FTRACE if (HAVE_FUNCTION_TRACER)
		select HAVE_GENERIC_DMA_COHERENT
		help
		The ARM series is a line of low-power-consumption RISC chip designs

arch/powerpc/Kconfig

+0 −1

Original line number	Diff line number	Diff line
		@@ -111,7 +111,6 @@ config ARCH_NO_VIRT_TO_BUS
		config PPC
		bool
		default y
		select HAVE_DYNAMIC_FTRACE
		select HAVE_FUNCTION_TRACER
		select ARCH_WANT_OPTIONAL_GPIOLIB
		select HAVE_IDE

arch/sparc64/Kconfig

+0 −1

Original line number	Diff line number	Diff line
		@@ -11,7 +11,6 @@ config SPARC
		config SPARC64
		bool
		default y
		select HAVE_DYNAMIC_FTRACE
		select HAVE_FUNCTION_TRACER
		select HAVE_IDE
		select HAVE_LMB

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