parisc: Fix uninitialized variable usage in unwind.c

hdeller · hdeller · commit cf8afe5c5362 · 2018-10-16T11:37:29.000+02:00
As noticed by Dave Anglin, the last commit introduced a small bug where
the potentially uninitialized r struct is used instead of the regs
pointer as input for unwind_frame_init(). Fix it.

Signed-off-by: Helge Deller &lt;deller@gmx.de&gt;
Reported-by: John David Anglin &lt;dave.anglin@bell.net&gt;
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
@@ -426,7 +426,7 @@ void unwind_frame_init_task(struct unwind_frame_info *info,
 			r.gr[30] = get_parisc_stackpointer();
 			regs = &r;
 		}
-		unwind_frame_init(info, task, &r);
+		unwind_frame_init(info, task, regs);
 	} else {
 		unwind_frame_init_from_blocked_task(info, task);
 	}

Original file line number	Diff line number	Diff line change
`@@ -426,7 +426,7 @@ void unwind_frame_init_task(struct unwind_frame_info *info,`
`426`	`426`	`r.gr[30] = get_parisc_stackpointer();`
`427`	`427`	`regs = &r;`
`428`	`428`	`}`
`429`		`- unwind_frame_init(info, task, &r);`
	`429`	`+ unwind_frame_init(info, task, regs);`
`430`	`430`	`} else {`
`431`	`431`	`unwind_frame_init_from_blocked_task(info, task);`
`432`	`432`	`}`