https://github.com/torvalds/linux
Revision 9530d0fe129c0197d5df13319ccefd08a827383b authored by Qais Yousef on 11 December 2015, 21:41:09 UTC, committed by Linus Torvalds on 12 December 2015, 18:15:34 UTC
Recent changes to how GFP_ATOMIC is defined seems to have broken the
condition to use mips_alloc_from_contiguous() in
mips_dma_alloc_coherent().

I couldn't bottom out the exact change but I think it's this commit
d0164adc89f6 ("mm, page_alloc: distinguish between being unable to
sleep, unwilling to sleep and avoiding waking kswapd").

GFP_ATOMIC has multiple bits set and the check for !(gfp & GFP_ATOMIC)
isn't enough.

The reason behind this condition is to check whether we can potentially
do a sleeping memory allocation.  Use gfpflags_allow_blocking() instead
which should be more robust.

Signed-off-by: Qais Yousef <qais.yousef@imgtec.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 2d33fa1
History
Tip revision: 9530d0fe129c0197d5df13319ccefd08a827383b authored by Qais Yousef on 11 December 2015, 21:41:09 UTC
MIPS: fix DMA contiguous allocation
Tip revision: 9530d0f
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