kmalloc alignment

[Atsushi Nemoto <anemo@mba.ocn.ne.jp>]

In include/asm-mips/cache.h:

#define ARCH_KMALLOC_MINALIGN   8

Is this line really needed?

If it was not defined (and ARCH_KMALLOC_FLAGS was also not defined),
default alignment (cache_line_size()) will be used for kmalloc.  It is
enough, isn't it?

Also, with current 8 byte alignment, many PCI drivers which are using
kmalloc and dma_map_single are broken on non-coherent system.  I was
told that those drivers should use dma_get_cache_alignment() API, but
currently nobody do it anyway.  Removing ARCH_KMALLOC_MINALIGN will
help those (broken?) drivers.

---
Atsushi Nemoto