From 94224fb702bca62a3b8e00313d6232633b6ea817 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Wed, 8 Apr 2015 09:44:37 +1000
Subject: [PATCH] mm-cma-add-functions-to-get-region-pages-counters-fix

move debug code from cma.c into cma_debug.c so it doesn't get included in
CONFIG_CMA_DEBUGFS=n builds

Cc: Dmitry Safonov <d.safonov@partner.samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Stefan Strogin <stefan.strogin@gmail.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Pintu Kumar <pintu.k@samsung.com>
Cc: Weijie Yang <weijie.yang@samsung.com>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Vyacheslav Tyrtov <v.tyrtov@samsung.com>
Cc: Aleksei Mateosian <a.mateosian@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 include/linux/cma.h |  2 --
 mm/cma.c            | 30 ------------------------------
 mm/cma_debug.c      | 31 +++++++++++++++++++++++++++++++
 3 files changed, 31 insertions(+), 32 deletions(-)

diff --git a/include/linux/cma.h b/include/linux/cma.h
index 1231f50f865e..f7ef093ec49a 100644
--- a/include/linux/cma.h
+++ b/include/linux/cma.h
@@ -18,8 +18,6 @@ struct cma;
 extern unsigned long totalcma_pages;
 extern phys_addr_t cma_get_base(const struct cma *cma);
 extern unsigned long cma_get_size(const struct cma *cma);
-extern unsigned long cma_get_used(struct cma *cma);
-extern unsigned long cma_get_maxchunk(struct cma *cma);
 
 extern int __init cma_declare_contiguous(phys_addr_t base,
 			phys_addr_t size, phys_addr_t limit,
diff --git a/mm/cma.c b/mm/cma.c
index d839011e8c6f..3a7a67b93394 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -53,36 +53,6 @@ unsigned long cma_get_size(const struct cma *cma)
 	return cma->count << PAGE_SHIFT;
 }
 
-unsigned long cma_get_used(struct cma *cma)
-{
-	unsigned long ret = 0;
-
-	mutex_lock(&cma->lock);
-	/* pages counter is smaller than sizeof(int) */
-	ret = bitmap_weight(cma->bitmap, (int)cma->count);
-	mutex_unlock(&cma->lock);
-
-	return ret << cma->order_per_bit;
-}
-
-unsigned long cma_get_maxchunk(struct cma *cma)
-{
-	unsigned long maxchunk = 0;
-	unsigned long start, end = 0;
-
-	mutex_lock(&cma->lock);
-	for (;;) {
-		start = find_next_zero_bit(cma->bitmap, cma->count, end);
-		if (start >= cma->count)
-			break;
-		end = find_next_bit(cma->bitmap, cma->count, start);
-		maxchunk = max(end - start, maxchunk);
-	}
-	mutex_unlock(&cma->lock);
-
-	return maxchunk << cma->order_per_bit;
-}
-
 static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
 					     int align_order)
 {
diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index 984ceddf8d31..7dd593a4e9dc 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -22,6 +22,37 @@ struct cma_mem {
 
 static struct dentry *cma_debugfs_root;
 
+static unsigned long cma_get_used(struct cma *cma)
+{
+	unsigned long ret = 0;
+
+	mutex_lock(&cma->lock);
+	/* pages counter is smaller than sizeof(int) */
+	ret = bitmap_weight(cma->bitmap, (int)cma->count);
+	mutex_unlock(&cma->lock);
+
+	return ret << cma->order_per_bit;
+}
+
+static unsigned long cma_get_maxchunk(struct cma *cma)
+{
+	unsigned long maxchunk = 0;
+	unsigned long start, end = 0;
+
+	mutex_lock(&cma->lock);
+	for (;;) {
+		start = find_next_zero_bit(cma->bitmap, cma->count, end);
+		if (start >= cma->count)
+			break;
+		end = find_next_bit(cma->bitmap, cma->count, start);
+		maxchunk = max(end - start, maxchunk);
+	}
+	mutex_unlock(&cma->lock);
+
+	return maxchunk << cma->order_per_bit;
+}
+
+
 static int cma_debugfs_get(void *data, u64 *val)
 {
 	unsigned long *p = data;
-- 
2.39.5