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

[KOSAKI Motohiro]

Dmitry Eremin-Solenikov reported IrDA driver on PXA started to fail
after commit a197b59ae (mm: fail GFP_DMA allocations when ZONE_DMA
is not configured). Pavel Mechek mentioned it also broke zaurus.

Even though the concept of commit a197b59ae is correct. It's no worth
to break ARM. Thus this should be reverted until finished to audit
all GFP_DMA users.

This reverts commit a197b59ae6e8bee56fcef37ea2482dc08414e2ac.

Reported-by: Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx>
Reported-by: Pavel Machek <pavel@xxxxxx>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
 mm/page_alloc.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a4e1db3..4e8985a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -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
-- 
1.7.3.1






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