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ftrace: disable dynamic ftrace for all archs that use daemon

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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>
This commit is contained in:
Steven Rostedt 2008-10-23 09:33:04 -04:00 committed by Ingo Molnar
parent 6912896e99
commit 07c4cc1cda
3 changed files with 0 additions and 3 deletions
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1
arch/arm/Kconfig
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@ -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

1
arch/powerpc/Kconfig
View File

@ -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

1
arch/sparc64/Kconfig
View File

@ -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