Commit c64ac9f0 authored by David McCullough's avatar David McCullough Committed by Paul Mundt
Browse files

sh: fix get_wchan() for SH kernels without framepointers 



Do not follow the frame pointers (/proc/X/task/1/stat) unless we were
compiled with them.

Signed-off-by: default avatarDavid McCullough <david_mccullough@au.securecomputing.com>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 1f25756a

arch/sh/kernel/process.c

+4 −2
Original line number Diff line number Diff line
@@ -474,7 +474,6 @@ asmlinkage int sys_execve(char __user *ufilename, char __user * __user *uargv, 


unsigned long get_wchan(struct task_struct *p)

{

	unsigned long schedule_frame;

	unsigned long pc;



	if (!p || p == current || p->state == TASK_RUNNING)
@@ -484,10 +483,13 @@ unsigned long get_wchan(struct task_struct *p) 
	 * The same comment as on the Alpha applies here, too ...

	 */

	pc = thread_saved_pc(p);



#ifdef CONFIG_FRAME_POINTER

	if (in_sched_functions(pc)) {

		schedule_frame = (unsigned long)p->thread.sp;

		unsigned long schedule_frame = (unsigned long)p->thread.sp;

		return ((unsigned long *)schedule_frame)[21];

	}

#endif



	return pc;

}