+ cma-take-__gfp_nowarn-into-account-in-cma_alloc.patch added to -mm tree

+ cma-take-__gfp_nowarn-into-account-in-cma_alloc.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/cma.c: take __GFP_NOWARN into account in cma_alloc()
has been added to the -mm tree.  Its filename is
     cma-take-__gfp_nowarn-into-account-in-cma_alloc.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/cma-take-__gfp_nowarn-into-account-in-cma_alloc.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/cma-take-__gfp_nowarn-into-account-in-cma_alloc.patch

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------------------------------------------------------
From: Boris Brezillon <boris.brezillon@free-electrons.com>
Subject: mm/cma.c: take __GFP_NOWARN into account in cma_alloc()

cma_alloc() unconditionally prints an INFO message when the CMA allocation
fails.  Make this message conditional on the non-presence of __GFP_NOWARN
in gfp_mask.

This patch aims at removing INFO messages that are displayed when the VC4
driver tries to allocate buffer objects.  From the driver perspective an
allocation failure is acceptable, and the driver can possibly do something
to make following allocation succeed (like flushing the VC4 internal
cache).

Link: http://lkml.kernel.org/r/20171004125447.15195-1-boris.brezillon@free-electrons.com
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Cc: Jaewon Kim <jaewon31.kim@samsung.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Eric Anholt <eric@anholt.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/cma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/cma.c~cma-take-__gfp_nowarn-into-account-in-cma_alloc mm/cma.c
--- a/mm/cma.c~cma-take-__gfp_nowarn-into-account-in-cma_alloc
+++ a/mm/cma.c
@@ -460,7 +460,7 @@ struct page *cma_alloc(struct cma *cma,
 
 	trace_cma_alloc(pfn, page, count, align);
 
-	if (ret) {
+	if (ret && !(gfp_mask & __GFP_NOWARN)) {
 		pr_info("%s: alloc failed, req-size: %zu pages, ret: %d\n",
 			__func__, count, ret);
 		cma_debug_show_areas(cma);
_

Patches currently in -mm which might be from boris.brezillon@free-electrons.com are

cma-take-__gfp_nowarn-into-account-in-cma_alloc.patch