tools: Provide a definition of WARN_ON

The definition of WARN_ON being used by the radix tree test suite was
deficient in two ways: it did not provide a return value, and it stopped
execution instead of continuing.  This version of WARN_ON tells you
which file & line the assertion was triggered in.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>

diff --git a/tools/include/asm/bug.h b/tools/include/asm/bug.h
index beda1a8..4790f04 100644 (file)
--- a/tools/include/asm/bug.h
+++ b/tools/include/asm/bug.h
@@ -12,6 +12,14 @@
        unlikely(__ret_warn_on);                \
 })
 
+#define WARN_ON(condition) ({                                  \
+       int __ret_warn_on = !!(condition);                      \
+       if (unlikely(__ret_warn_on))                            \
+               __WARN_printf("assertion failed at %s:%d\n",    \
+                               __FILE__, __LINE__);            \
+       unlikely(__ret_warn_on);                                \
+})
+
 #define WARN_ON_ONCE(condition) ({                     \
        static int __warned;                            \
        int __ret_warn_once = !!(condition);            \

diff --git a/tools/testing/radix-tree/linux/kernel.h b/tools/testing/radix-tree/linux/kernel.h
index 1cd72a8..9681463 100644 (file)
--- a/tools/testing/radix-tree/linux/kernel.h
+++ b/tools/testing/radix-tree/linux/kernel.h
@@ -24,7 +24,6 @@
 #endif
 
 #define BUG_ON(expr)   assert(!(expr))
-#define WARN_ON(expr)  assert(!(expr))
 #define __init
 #define __must_check
 #define panic(expr)