linux-kernel - [PATCH] mm: cma: Fix totalcma_pages to include DT defined CMA regions

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Message-Id: <1420812065-129868-1-git-send-email-george_davis@mentor.com>
Date:	Fri,  9 Jan 2015 09:01:05 -0500
From:	"George G. Davis" <ggdavisiv@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	"George G. Davis" <george_davis@...tor.com>
Subject: [PATCH] mm: cma: Fix totalcma_pages to include DT defined CMA regions

The totalcma_pages variable is not updated to account for CMA regions
defined via device tree reserved-memory sub-nodes.  Fix this omission by
moving the calculation of totalcma_pages into cma_init_reserved_mem()
instead of cma_declare_contiguous() such that it will include reserved
memory used by all CMA regions.

Signed-off-by: George G. Davis <george_davis@...tor.com>
---
 mm/cma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/cma.c b/mm/cma.c
index a85ae28..75016fd 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -199,6 +199,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
 	cma->order_per_bit = order_per_bit;
 	*res_cma = cma;
 	cma_area_count++;
+	totalcma_pages += (size / PAGE_SIZE);
 
 	return 0;
 }
@@ -337,7 +338,6 @@ int __init cma_declare_contiguous(phys_addr_t base,
 	if (ret)
 		goto err;
 
-	totalcma_pages += (size / PAGE_SIZE);
 	pr_info("Reserved %ld MiB at %pa\n", (unsigned long)size / SZ_1M,
 		&base);
 	return 0;
-- 
1.9.3

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