Commit 5a89f1ad authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: latencytop support. 



Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 0e660d2d

arch/sh/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -100,6 +100,10 @@ config STACKTRACE_SUPPORT 
config LOCKDEP_SUPPORT

	def_bool y



config HAVE_LATENCYTOP_SUPPORT

	def_bool y

	depends on !SMP



config ARCH_HAS_ILOG2_U32

	def_bool n

arch/sh/kernel/stacktrace.c

+22 −1
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
 *

 * Stack trace management functions

 *

 *  Copyright (C) 2006  Paul Mundt

 *  Copyright (C) 2006 - 2008  Paul Mundt

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive
@@ -36,3 +36,24 @@ void save_stack_trace(struct stack_trace *trace) 
	}

}

EXPORT_SYMBOL_GPL(save_stack_trace);



void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)

{

	unsigned long *sp = (unsigned long *)tsk->thread.sp;



	while (!kstack_end(sp)) {

		unsigned long addr = *sp++;



		if (__kernel_text_address(addr)) {

			if (in_sched_functions(addr))

				break;

			if (trace->skip > 0)

				trace->skip--;

			else

				trace->entries[trace->nr_entries++] = addr;

			if (trace->nr_entries >= trace->max_entries)

				break;

		}

	}

}

EXPORT_SYMBOL_GPL(save_stack_trace_tsk);