From: Sasha Levin <sasha.le...@oracle.com> Date: Sun, 26 Oct 2014 19:32:42 -0400
> How so? GCC states clearly that you should *never* pass a NULL > pointer there: > > "The pointers passed to memmove (and similar functions in <string.h>) must > be non-null even when nbytes==0" > (https://gcc.gnu.org/gcc-4.9/porting_to.html). > > Even if it doesn't dereference it, it can break somehow in a subtle way. > Leaving > the kernel code assuming that gcc (or any other compiler) would always behave > the same in a situation that shouldn't occur. Show me a legal way in which one could legally dereference the pointer when length is zero, and I'll entertain this patch. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
