From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 15 Jul 2008 17:31:35 +0000 (-0700)
Subject: Merge branch 'core/stacktrace' of git://git.kernel.org/pub/scm/linux/kernel/git/tip... 
X-Git-Tag: v2.6.27-rc1~1085
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=af5329cdf51cdd208a323e521faa46800a16d2ec;p=linux-2.6-omap-h63xx.git

Merge branch 'core/stacktrace' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core/stacktrace' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  generic-ipi: powerpc/generic-ipi tree build failure
  stacktrace: fix build failure on sparc64
  stacktrace: export save_stack_trace[_tsk]
  stacktrace: fix modular build, export print_stack_trace and save_stack_trace
  backtrace: replace timer with tasklet + completions
  stacktrace: add saved stack traces to backtrace self-test
  stacktrace: print_stack_trace() cleanup
  debugging: make stacktrace independent from DEBUG_KERNEL
  stacktrace: don't crash on invalid stack trace structs
---

af5329cdf51cdd208a323e521faa46800a16d2ec
diff --cc arch/arm/kernel/stacktrace.c
index 90e0c35ae60,6b3ffde5dea..fc650f64df4
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c
@@@ -65,31 -61,10 +65,32 @@@ void save_stack_trace_tsk(struct task_s
  
  	data.trace = trace;
  	data.skip = trace->skip;
 -	base = (unsigned long)task_stack_page(current);
 -	asm("mov %0, fp" : "=r" (fp));
 +	base = (unsigned long)task_stack_page(tsk);
 +
 +	if (tsk != current) {
 +#ifdef CONFIG_SMP
 +		/*
 +		 * What guarantees do we have here that 'tsk'
 +		 * is not running on another CPU?
 +		 */
 +		BUG();
 +#else
 +		data.no_sched_functions = 1;
 +		fp = thread_saved_fp(tsk);
 +#endif
 +	} else {
 +		data.no_sched_functions = 0;
 +		asm("mov %0, fp" : "=r" (fp));
 +	}
  
  	walk_stackframe(fp, base, base + THREAD_SIZE, save_trace, &data);
 +	if (trace->nr_entries < trace->max_entries)
 +		trace->entries[trace->nr_entries++] = ULONG_MAX;
 +}
 +
 +void save_stack_trace(struct stack_trace *trace)
 +{
 +	save_stack_trace_tsk(current, trace);
  }
+ EXPORT_SYMBOL_GPL(save_stack_trace);
  #endif