On Thu, 2012-05-24 at 10:29 -0700, H. Peter Anvin wrote: > On 05/24/2012 10:26 AM, Joe Perches wrote: > > On Thu, 2012-05-24 at 10:03 -0600, T Makphaibulchoke wrote: > >> The patch cleans up the file lib/decompress_unxz.c by removing all memory > >> helper functions, e.g., memmove. By doing so, any architecture's preboot > >> environment supporting the XZ decompression needs to define its own copy of > >> any of the missing memory helper functions. > > > > Perhaps a silly question, but why not use > > the __builtin variants? > > For a lot of cases the __builtin variants just generate a call to the > expected out-of-line function, so you need it anyway. While I'm not completely knowledgeable about gcc, aren't all the __builtin_mem<foo> functions always available in gcc 3+ http://gcc.gnu.org/onlinedocs/gcc-3.0.4/gcc_5.html#SEC114 It does say: Many of these functions are only optimized in certain cases; if not optimized in a particular case, a call to the library function will be emitted. -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
