tracing: Do not select FRAME_POINTER on PPC
Gerlando Falauto [Mon, 27 Feb 2012 08:08:21 +0000 (09:08 +0100)]
On PowerPC, FUNCTION_TRACER selects FRAME_POINTER, even
though the architecture does not support it.

This causes the following warning:
warning: (LOCKDEP && FAULT_INJECTION_STACKTRACE_FILTER && LATENCYTOP && FUNCTION_TRACER && KMEMCHECK) selects FRAME_POINTER which has unmet direct dependencies (DEBUG_KERNEL && (CRIS || M68K || FRV || UML || AVR32 || SUPERH || BLACKFIN || MN10300) || ARCH_WANT_FRAME_POINTERS)

So remove the warning by adding the extra condition
"if !PPC" to FUNCTION_TRACER for FRAME_POINTER selection

Link: http://lkml.kernel.org/r/1330330101-8618-1-git-send-email-gerlando.falauto@keymile.com

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Gerlando Falauto <gerlando.falauto@keymile.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

kernel/trace/Kconfig

index cd31345..a1d2849 100644 (file)
@@ -141,7 +141,7 @@ if FTRACE
 config FUNCTION_TRACER
        bool "Kernel Function Tracer"
        depends on HAVE_FUNCTION_TRACER
-       select FRAME_POINTER if !ARM_UNWIND && !S390 && !MICROBLAZE
+       select FRAME_POINTER if !ARM_UNWIND && !PPC && !S390 && !MICROBLAZE
        select KALLSYMS
        select GENERIC_TRACER
        select CONTEXT_SWITCH_TRACER