On Thursday 06 September 2007 22:27, Serge Belyshev wrote: > It is ok to call prefetch() function with NULL argument, as specifically > commented in include/linux/prefetch.h. But in standard C, it is invalid to > dereference NULL pointer (see C99 standard 6.5.3.2 paragraph 4 and note > #84). Newer gcc versions (4.3 and above) will use that to conclude that "x" > argument is non-null and thus wreaking havok everywhere prefetch() was > inlined. Fixed by removing cast and changing asm constraint. > > This can be fixed better by using gcc's __builtin_prefetch().
I changed it to just use that. Thanks. It seems like gcc 3.1/3.2 already supported it and that's the earliest gcc still supported so it can be used unconditionally. -Andi - 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/
