[RFC PATCH 08/12] cma: Store a name in the cma structure

@@ -165,7 +165,8 @@ int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base,
 {
 	int ret;
 
-	ret = cma_declare_contiguous(base, size, limit, 0, 0, fixed, res_cma);
+	ret = cma_declare_contiguous(base, size, limit, 0, 0, fixed,
+					"reserved", res_cma);
 	if (ret)
 		return ret;
 

@@ -257,7 +258,7 @@ static int __init rmem_cma_setup(struct reserved_mem *rmem)
 		return -EINVAL;
 	}
 
-	err = cma_init_reserved_mem(rmem->base, rmem->size, 0, &cma);
+	err = cma_init_reserved_mem(rmem->base, rmem->size, 0, rmem->name, &cma);
 	if (err) {
 		pr_err("Reserved memory: unable to setup CMA region\n");
 		return err;

@@ -21,13 +21,15 @@ 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 const char *cma_get_name(const struct cma *cma);
 
 extern int __init cma_declare_contiguous(phys_addr_t base,
 			phys_addr_t size, phys_addr_t limit,
 			phys_addr_t alignment, unsigned int order_per_bit,
-			bool fixed, struct cma **res_cma);
+			bool fixed, const char *name, struct cma **res_cma);
 extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
 					unsigned int order_per_bit,
+					const char *name,
 					struct cma **res_cma);
 extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align);
 extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);

@@ -53,6 +53,11 @@ unsigned long cma_get_size(const struct cma *cma)
 	return cma->count << PAGE_SHIFT;
 }
 
+const char *cma_get_name(const struct cma *cma)
+{
+	return cma->name ? cma->name : "(undefined)";
+}
+
 static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
 					     int align_order)
 {

@@ -168,6 +173,7 @@ core_initcall(cma_init_reserved_areas);
  */
 int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
 				 unsigned int order_per_bit,
+				 const char *name,
 				 struct cma **res_cma)
 {
 	struct cma *cma;

@@ -201,6 +207,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
 	cma->base_pfn = PFN_DOWN(base);
 	cma->count = size >> PAGE_SHIFT;
 	cma->order_per_bit = order_per_bit;
+	cma->name = name;
 	*res_cma = cma;
 	cma_area_count++;
 	totalcma_pages += (size / PAGE_SIZE);

@@ -229,7 +236,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
 int __init cma_declare_contiguous(phys_addr_t base,
 			phys_addr_t size, phys_addr_t limit,
 			phys_addr_t alignment, unsigned int order_per_bit,
-			bool fixed, struct cma **res_cma)
+			bool fixed, const char *name, struct cma **res_cma)
 {
 	phys_addr_t memblock_end = memblock_end_of_DRAM();
 	phys_addr_t highmem_start;

@@ -335,7 +342,7 @@ int __init cma_declare_contiguous(phys_addr_t base,
 		base = addr;
 	}
 
-	ret = cma_init_reserved_mem(base, size, order_per_bit, res_cma);
+	ret = cma_init_reserved_mem(base, size, order_per_bit, name, res_cma);
 	if (ret)
 		goto err;
 

@@ -11,6 +11,7 @@ struct cma {
 	struct hlist_head mem_head;
 	spinlock_t mem_head_lock;
 #endif
+	const char *name;
 };
 
 extern struct cma cma_areas[MAX_CMA_AREAS];

@@ -167,7 +167,7 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
 	char name[16];
 	int u32s;
 
-	sprintf(name, "cma-%d", idx);
+	sprintf(name, "cma-%s", cma->name);
 
 	tmp = debugfs_create_dir(name, cma_debugfs_root);