On Tue, Oct 20, 2015 at 06:53:31PM +0200, Peter Zijlstra wrote:
> Also, would it not be better to fix WARN_ON_ONCE() instead?
> 

Clearly I'm an idiot and should stay away from the computer...

---
 include/asm-generic/bug.h | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 630dd2372238..d0972fc8433f 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -110,9 +110,10 @@ extern void warn_slowpath_null(const char *file, const int 
line);
        static bool __section(.data.unlikely) __warned;         \
        int __ret_warn_once = !!(condition);                    \
                                                                \
-       if (unlikely(__ret_warn_once))                          \
-               if (WARN_ON(!__warned))                         \
-                       __warned = true;                        \
+       if (unlikely(__ret_warn_once && !__warned)) {           \
+               __warned = true;                                \
+               WARN_ON(1);                                     \
+       }                                                       \
        unlikely(__ret_warn_once);                              \
 })
 
@@ -120,9 +121,10 @@ extern void warn_slowpath_null(const char *file, const int 
line);
        static bool __section(.data.unlikely) __warned;         \
        int __ret_warn_once = !!(condition);                    \
                                                                \
-       if (unlikely(__ret_warn_once))                          \
-               if (WARN(!__warned, format))                    \
-                       __warned = true;                        \
+       if (unlikely(__ret_warn_once && !__warned)) {           \
+               __warned = true;                                \
+               WARN(1, format);                                \
+       }                                                       \
        unlikely(__ret_warn_once);                              \
 })
 
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