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sh: latencytop support.

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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2008-09-13 01:44:03 +09:00
parent 0e660d2d43
commit 5a89f1adbc
2 changed files with 26 additions and 1 deletions
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4
arch/sh/Kconfig
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@ -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

23
arch/sh/kernel/stacktrace.c
View File

@ -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);