Messages in this thread Patch in this message | | | Date | Tue, 25 Feb 2014 19:48:35 -0800 | From | Josh Triplett <> | Subject | [PATCH v2 1/5] bug: When !CONFIG_BUG, simplify WARN_ON_ONCE and family |
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When !CONFIG_BUG, WARN_ON and family become simple passthroughs of their condition argument; however, WARN_ON_ONCE and family still have conditions and a boolean to detect one-time invocation, even though the warning they'd emit doesn't exist. Make the existing definitions conditional on CONFIG_BUG, and add definitions for !CONFIG_BUG that map to the passthrough versions of WARN and WARN_ON.
This saves 4.4k on a minimized configuration (smaller than allnoconfig), and 20.6k with defconfig plus CONFIG_BUG=n.
Signed-off-by: Josh Triplett <josh@joshtriplett.org> --- v2: Incorporate feedback from Arnd Bergmann: make the WARN_* variants with format strings and arguments call WARN and pass along those arguments, rather than calling WARN_ON. Used by the new patch 3, which makes the stub version of WARN call no_printk.
include/asm-generic/bug.h | 57 +++++++++++++++++++++++++---------------------- 1 file changed, 30 insertions(+), 27 deletions(-)
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index 7d10f96..7ecd398 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -106,33 +106,6 @@ extern void warn_slowpath_null(const char *file, const int line); unlikely(__ret_warn_on); \ }) -#else /* !CONFIG_BUG */ -#ifndef HAVE_ARCH_BUG -#define BUG() do {} while(0) -#endif - -#ifndef HAVE_ARCH_BUG_ON -#define BUG_ON(condition) do { if (condition) ; } while(0) -#endif - -#ifndef HAVE_ARCH_WARN_ON -#define WARN_ON(condition) ({ \ - int __ret_warn_on = !!(condition); \ - unlikely(__ret_warn_on); \ -}) -#endif - -#ifndef WARN -#define WARN(condition, format...) ({ \ - int __ret_warn_on = !!(condition); \ - unlikely(__ret_warn_on); \ -}) -#endif - -#define WARN_TAINT(condition, taint, format...) WARN_ON(condition) - -#endif - #define WARN_ON_ONCE(condition) ({ \ static bool __section(.data.unlikely) __warned; \ int __ret_warn_once = !!(condition); \ @@ -163,6 +136,36 @@ extern void warn_slowpath_null(const char *file, const int line); unlikely(__ret_warn_once); \ }) +#else /* !CONFIG_BUG */ +#ifndef HAVE_ARCH_BUG +#define BUG() do {} while(0) +#endif + +#ifndef HAVE_ARCH_BUG_ON +#define BUG_ON(condition) do { if (condition) ; } while(0) +#endif + +#ifndef HAVE_ARCH_WARN_ON +#define WARN_ON(condition) ({ \ + int __ret_warn_on = !!(condition); \ + unlikely(__ret_warn_on); \ +}) +#endif + +#ifndef WARN +#define WARN(condition, format...) ({ \ + int __ret_warn_on = !!(condition); \ + unlikely(__ret_warn_on); \ +}) +#endif + +#define WARN_ON_ONCE(condition) WARN_ON(condition) +#define WARN_ONCE(condition, format...) WARN(condition, format) +#define WARN_TAINT(condition, taint, format...) WARN(condition, format) +#define WARN_TAINT_ONCE(condition, taint, format...) WARN(condition, format) + +#endif + /* * WARN_ON_SMP() is for cases that the warning is either * meaningless for !SMP or may even cause failures. -- 1.9.0
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