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powerpc32, ftrace: dynamic function graph tracer 

This patch gets function graph tracing working with dynamic function
tracer on PowerPC32.

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Steven Rostedt 2009-02-11 20:06:43 -05:00 committed by Benjamin Herrenschmidt
parent fad4f47cc8
commit 60ce8f7260
2 changed files with 7 additions and 3 deletions
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2
arch/powerpc/Kconfig
View File

@ -111,7 +111,7 @@ config PPC
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_DYNAMIC_FTRACE
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER if PPC64 || !DYNAMIC_FTRACE
select HAVE_FUNCTION_GRAPH_TRACER
select ARCH_WANT_OPTIONAL_GPIOLIB
select HAVE_IDE
select HAVE_IOREMAP_PROT

8
arch/powerpc/kernel/entry_32.S
View File

@ -1183,7 +1183,12 @@ _GLOBAL(ftrace_caller)
ftrace_call:
bl ftrace_stub
nop
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl ftrace_graph_call
ftrace_graph_call:
b ftrace_graph_stub
_GLOBAL(ftrace_graph_stub)
#endif
MCOUNT_RESTORE_FRAME
/* old link register ends up in ctr reg */
bctr
@ -1205,7 +1210,6 @@ _GLOBAL(_mcount)
b ftrace_graph_caller
#endif
MCOUNT_RESTORE_FRAME
bctr
#endif