bug: Remove redundant condition check in report_bug

report_bug() will return early if it cannot find a bug corresponding to
the provided address. The subsequent test for the bug will always be
true so remove it.

Fixes: 1b4cfe3c0a30d ("lib/bug.c: exclude non-BUG/WARN exceptions from report_bug()")
Signed-off-by: Andrew Scull <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: "Steven Rostedt (VMware)" <[e-mail]>
Reviewed-by: Steven Rostedt (VMware) <[e-mail]>
Acked-by: Will Deacon <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

lib/bug.c

···
 
 	file = NULL;
 	line = 0;
-	warning = 0;
 
-	if (bug) {
 #ifdef CONFIG_DEBUG_BUGVERBOSE
 #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
-		file = bug->file;
+	file = bug->file;
 #else
-		file = (const char *)bug + bug->file_disp;
+	file = (const char *)bug + bug->file_disp;
 #endif
-		line = bug->line;
+	line = bug->line;
 #endif
-		warning = (bug->flags & BUGFLAG_WARNING) != 0;
-		once = (bug->flags & BUGFLAG_ONCE) != 0;
-		done = (bug->flags & BUGFLAG_DONE) != 0;
+	warning = (bug->flags & BUGFLAG_WARNING) != 0;
+	once = (bug->flags & BUGFLAG_ONCE) != 0;
+	done = (bug->flags & BUGFLAG_DONE) != 0;
 
-		if (warning && once) {
-			if (done)
-				return BUG_TRAP_TYPE_WARN;
+	if (warning && once) {
+		if (done)
+			return BUG_TRAP_TYPE_WARN;
 
-			/*
-			 * Since this is the only store, concurrency is not an issue.
-			 */
-			bug->flags |= BUGFLAG_DONE;
-		}
+		/*
+		 * Since this is the only store, concurrency is not an issue.
+		 */
+		bug->flags |= BUGFLAG_DONE;
 	}
 
 	/*