Hi, On Thu, Jan 03, 2008 at 10:26:05PM +0100, Arjan van de Ven wrote:
> This patch build on top of Olof's patch that introduces __WARN, > and places the slowpath out of line. It also uses Ingo's suggestion > to not use __FUNCTION__ but to use kallsyms to do the lookup; > this saves a ton of extra space since gcc doesn't need to store the function > string twice now: > > 3936367 833603 624736 5394706 525112 vmlinux.before > 3917508 833603 624736 5375847 520767 vmlinux-slowpath > > 15Kb savings... This patch actually resulted in a slight size increase on PPC, most likely because of the new warn_on_slowpath() that isn't used: text data bss dec hex filename 8059224 1820584 529064 10408872 9ed3a8 vmlinux.mainline 8058268 1820592 529064 10407924 9ecff4 vmlinux.mm 8058324 1820648 529064 10408036 9ed064 vmlinux.mm+arjanpatch Also: > Index: linux-2.6.24-rc6/include/asm-generic/bug.h > =================================================================== > --- linux-2.6.24-rc6.orig/include/asm-generic/bug.h > +++ linux-2.6.24-rc6/include/asm-generic/bug.h > @@ -32,11 +32,8 @@ struct bug_entry { > #endif > > #ifndef __WARN > -#define __WARN() do { > \ > - printk("WARNING: at %s:%d %s()\n", __FILE__, \ > - __LINE__, __FUNCTION__); \ > - dump_stack(); \ > -} while (0) > +extern void warn_on_slowpath(const char *file, const int line); > +#define __WARN() warn_on_slowpath(__FILE__, __LINE__) > #endif > This caused problems on powerpc, since bug.h ends up being pulled into some assembly files. The #defines in there have been fine, but the external declaration threw it off. (They need them to get to some of the include/asm-powerpc/bug.h contents, but it pulls in the generic one as well). Easiest is probably to encapsulate the whole file in #ifndef __ASSEMBLY__. -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/