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-rw-r--r--mm/cma.c31
-rw-r--r--mm/cma.h1
-rw-r--r--mm/cma_debug.c2
3 files changed, 31 insertions, 3 deletions
diff --git a/mm/cma.c b/mm/cma.c
index a6033e344430..978b4a1441ef 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -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;
@@ -198,6 +204,13 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
* subsystems (like slab allocator) are available.
*/
cma = &cma_areas[cma_area_count];
+ if (name) {
+ cma->name = name;
+ } else {
+ cma->name = kasprintf(GFP_KERNEL, "cma%d\n", cma_area_count);
+ if (!cma->name)
+ return -ENOMEM;
+ }
cma->base_pfn = PFN_DOWN(base);
cma->count = size >> PAGE_SHIFT;
cma->order_per_bit = order_per_bit;
@@ -229,7 +242,7 @@ 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 +348,7 @@ 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;
@@ -491,3 +504,17 @@ bool cma_release(struct cma *cma, const struct page *pages, unsigned int count)
return true;
}
+
+int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data)
+{
+ int i;
+
+ for (i = 0; i < cma_area_count; i++) {
+ int ret = it(&cma_areas[i], data);
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
diff --git a/mm/cma.h b/mm/cma.h
index 17c75a4246c8..49861286279d 100644
--- a/mm/cma.h
+++ b/mm/cma.h
@@ -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];
diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index ffc0c3d0ae64..595b757bef72 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -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);