tree 8f9c21f0df6bea88740d7dd48834ac9ffc238e93
parent eb91f1d0a531289e18f5587dc197d12a251c66a3
author Pekka Enberg <penberg@cs.helsinki.fi> 1244804586 +0300
committer Pekka Enberg <penberg@cs.helsinki.fi> 1244822013 +0300

slab,slub: don't enable interrupts during early boot

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: Pekka Enberg <penberg@cs.helsinki.fi>