sh: latencytop support. (5a89f1ad) · Commits · 戴 / test

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

+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);