• Pekka Enberg's avatar
    slab,slub: don't enable interrupts during early boot · 7e85ee0c
    Pekka Enberg authored
    As explained by Benjamin Herrenschmidt:
      Oh and btw, your patch alone doesn't fix powerpc, because it's missing
      a whole bunch of GFP_KERNEL's in the arch code... You would have to
      grep the entire kernel for things that check slab_is_available() and
      even then you'll be missing some.
      For example, slab_is_available() didn't always exist, and so in the
      early days on powerpc, we used a mem_init_done global that is set form
      mem_init() (not perfect but works in practice). And we still have code
      using that to do the test.
    Therefore, mask out __GFP_WAIT, __GFP_IO, and __GFP_FS in the slab allocators
    in early boot code to avoid enabling interrupts.
    Signed-off-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>