bug: fix warning suppressions with kunit built as module

CONFIG_KUNIT is a tristate symbol but the warning suppression code in
lib/bug.c is only built if it's built-in due to it using a plain #ifdef,
rendering warning suppressions broken for kunit build as loadable module.

kunit_is_suppressed_warning() already has a stub for when kunit is
disabled so drop that guard entirely.

Link: https://lore.kernel.org/r/[email protected]
Suggested-by: Albert Esteve <[email protected]>
Cc: [email protected]
Fixes: 85347718ab ("bug/kunit: Core support for suppressing warning backtraces")
Signed-off-by: Bartosz Golaszewski <[email protected]>
Reviewed-by: Albert Esteve <[email protected]>
Reviewed-by: David Gow <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

lib/bug.c

@@ -219,14 +219,12 @@ static enum bug_trap_type __report_bug(struct bug_entry *bug, unsigned long buga
 	no_cut   = bug->flags & BUGFLAG_NO_CUT_HERE;
 	has_args = bug->flags & BUGFLAG_ARGS;
 
-#ifdef CONFIG_KUNIT
 	/*
 	 * Before the once logic so suppressed warnings do not consume
 	 * the single-fire budget of WARN_ON_ONCE().
 	 */
 	if (warning && kunit_is_suppressed_warning(true))
 		return BUG_TRAP_TYPE_WARN;
-#endif
 
 	disable_trace_on_warning();