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 map them all to the passthrough WARN_ON
when !CONFIG_BUG.
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 <j...@joshtriplett.org>
---
diff's presentation here is not the easiest for reviewing purposes.
Effectively, this is moving the existing definitions of WARN_ON_ONCE and
family up into the CONFIG_BUG branch of the #ifdef, and then adding new
stub versions in the !CONFIG_BUG branch.
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..34223e0 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_ON(condition)
+#define WARN_TAINT(condition, taint, format...) WARN_ON(condition)
+#define WARN_TAINT_ONCE(condition, taint, format...) WARN_ON(condition)
+
+#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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