[PATCH] change WARN_ON back to "BUG: at ..."

WARN_ON() ever triggering is a kernel bug.  Do not try to paper over this
fact by suggesting to the user that this is 'only' a warning, as the
following recent commit does:

  commit 30e25b71e725b150585e17888b130e3324f8cf7c
  Author: Jeremy Fitzhardinge <jeremy@goop.org>
  Date:   Fri Dec 8 02:36:24 2006 -0800

    [PATCH] Fix generic WARN_ON message

    A warning is a warning, not a BUG.

( it might make sense to rename BUG() to CRASH() and BUG_ON() to
  CRASH_ON(), but that does not change the fact that WARN_ON()
  signals a kernel bug. )

i and others objected to this change during lkml review:

  http://marc.theaimsgroup.com/?l=linux-kernel&m=116115160710533&w=2

still the change slipped upstream - grumble :)

Also, use the standard "BUG: " format to make it easier to grep logs and
to make it easier to google for kernel bugs.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index a06eecd..14fae1f 100644 (file)
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -35,7 +35,7 @@ struct bug_entry {
 #define WARN_ON(condition) ({                                          \
        typeof(condition) __ret_warn_on = (condition);                  \
        if (unlikely(__ret_warn_on)) {                                  \
-               printk("WARNING at %s:%d %s()\n", __FILE__,     \
+               printk("BUG: at %s:%d %s()\n", __FILE__,                \
                        __LINE__, __FUNCTION__);                        \
                dump_stack();                                           \
        }                                                               \