Re: [RFC PATCH] x86, uaccess, pmem: introduce copy_from_iter_writethru for dax + pmem

From: Ingo Molnar
Date: Thu Apr 27 2017 - 02:31:10 EST



* Dan Williams <dan.j.williams@xxxxxxxxx> wrote:

> +#ifdef CONFIG_ARCH_HAS_UACCESS_WRITETHRU
> +#define __HAVE_ARCH_MEMCPY_WRITETHRU 1
> +void memcpy_writethru(void *dst, const void *src, size_t cnt);
> +#endif

This should be named memcpy_wt(), which is the well-known postfix for
write-through.

We already have ioremap_wt(), set_memory_wt(), etc. - no need to introduce a
longer variant with uncommon spelling.

Thanks,

Ingo