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Commit 8d26487f authored by Török Edwin's avatar Török Edwin Committed by Ingo Molnar
Browse files

tracing/stack-tracer: introduce CONFIG_USER_STACKTRACE_SUPPORT 



Impact: cleanup

User stack tracing is just implemented for x86, but it is not x86 specific.

Introduce a generic config flag, that is currently enabled only for x86.
When other arches implement it, they will have to
SELECT USER_STACKTRACE_SUPPORT.

Signed-off-by: default avatarTörök Edwin <edwintorok@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent cffa10ae

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ config X86 
	select HAVE_ARCH_TRACEHOOK

	select HAVE_GENERIC_DMA_COHERENT if X86_32

	select HAVE_EFFICIENT_UNALIGNED_ACCESS

	select USER_STACKTRACE_SUPPORT



config ARCH_DEFCONFIG

	string

include/linux/stacktrace.h

+1 −1
Original line number Diff line number Diff line
@@ -16,7 +16,7 @@ extern void save_stack_trace_tsk(struct task_struct *tsk, 


extern void print_stack_trace(struct stack_trace *trace, int spaces);



#ifdef CONFIG_X86

#ifdef CONFIG_USER_STACKTRACE_SUPPORT

extern void save_stack_trace_user(struct stack_trace *trace);

#else

# define save_stack_trace_user(trace)              do { } while (0)

kernel/trace/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -3,6 +3,9 @@ 
#  select HAVE_FUNCTION_TRACER:

#



config USER_STACKTRACE_SUPPORT

	bool



config NOP_TRACER

	bool