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Revert "mm: fail GFP_DMA allocations when ZONE_DMA is not configured" 

This reverts commit a197b59ae6.

As rmk says:
 "Commit a197b59ae6 (mm: fail GFP_DMA allocations when ZONE_DMA is not
  configured) is causing regressions on ARM with various drivers which
  use GFP_DMA.

  The behaviour up until now has been to silently ignore that flag when
  CONFIG_ZONE_DMA is not enabled, and to allocate from the normal zone.
  However, as a result of the above commit, such allocations now fail
  which causes drivers to fail.  These are regressions compared to the
  previous kernel version."

so just revert it.

Requested-by: Russell King <linux@arm.linux.org.uk>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Linus Torvalds 2011-06-02 06:11:24 +09:00
parent f0f52a9463
commit 1fa7b6a29c
1 changed files with 0 additions and 4 deletions
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4
mm/page_alloc.c
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@ -2247,10 +2247,6 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
if (should_fail_alloc_page(gfp_mask, order))
return NULL;
#ifndef CONFIG_ZONE_DMA
if (WARN_ON_ONCE(gfp_mask & __GFP_DMA))
return NULL;
#endif
/*
* Check the zones suitable for the gfp_mask contain at least one