diff options
| -rw-r--r-- | include/linux/cma.h | 12 | ||||
| -rw-r--r-- | mm/cma.c | 24 |
2 files changed, 20 insertions, 16 deletions
diff --git a/include/linux/cma.h b/include/linux/cma.h index 9384ba66e975..f7ef093ec49a 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -16,16 +16,16 @@ struct cma; extern unsigned long totalcma_pages; -extern phys_addr_t cma_get_base(struct cma *cma); -extern unsigned long cma_get_size(struct cma *cma); +extern phys_addr_t cma_get_base(const struct cma *cma); +extern unsigned long cma_get_size(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); -extern int cma_init_reserved_mem(phys_addr_t base, - phys_addr_t size, int order_per_bit, +extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, + unsigned int order_per_bit, struct cma **res_cma); -extern struct page *cma_alloc(struct cma *cma, int count, unsigned int align); -extern bool cma_release(struct cma *cma, struct page *pages, int count); +extern struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align); +extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); #endif @@ -41,17 +41,18 @@ struct cma cma_areas[MAX_CMA_AREAS]; unsigned cma_area_count; static DEFINE_MUTEX(cma_mutex); -phys_addr_t cma_get_base(struct cma *cma) +phys_addr_t cma_get_base(const struct cma *cma) { return PFN_PHYS(cma->base_pfn); } -unsigned long cma_get_size(struct cma *cma) +unsigned long cma_get_size(const struct cma *cma) { return cma->count << PAGE_SHIFT; } -static unsigned long cma_bitmap_aligned_mask(struct cma *cma, int align_order) +static unsigned long cma_bitmap_aligned_mask(const struct cma *cma, + int align_order) { if (align_order <= cma->order_per_bit) return 0; @@ -62,7 +63,8 @@ static unsigned long cma_bitmap_aligned_mask(struct cma *cma, int align_order) * Find a PFN aligned to the specified order and return an offset represented in * order_per_bits. */ -static unsigned long cma_bitmap_aligned_offset(struct cma *cma, int align_order) +static unsigned long cma_bitmap_aligned_offset(const struct cma *cma, + int align_order) { if (align_order <= cma->order_per_bit) return 0; @@ -71,13 +73,14 @@ static unsigned long cma_bitmap_aligned_offset(struct cma *cma, int align_order) - cma->base_pfn) >> cma->order_per_bit; } -static unsigned long cma_bitmap_pages_to_bits(struct cma *cma, - unsigned long pages) +static unsigned long cma_bitmap_pages_to_bits(const struct cma *cma, + unsigned long pages) { return ALIGN(pages, 1UL << cma->order_per_bit) >> cma->order_per_bit; } -static void cma_clear_bitmap(struct cma *cma, unsigned long pfn, int count) +static void cma_clear_bitmap(struct cma *cma, unsigned long pfn, + unsigned int count) { unsigned long bitmap_no, bitmap_count; @@ -162,7 +165,8 @@ core_initcall(cma_init_reserved_areas); * This function creates custom contiguous area from already reserved memory. */ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, - int order_per_bit, struct cma **res_cma) + unsigned int order_per_bit, + struct cma **res_cma) { struct cma *cma; phys_addr_t alignment; @@ -353,7 +357,7 @@ err: * This function allocates part of contiguous memory on specific * contiguous memory area. */ -struct page *cma_alloc(struct cma *cma, int count, unsigned int align) +struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align) { unsigned long mask, offset, pfn, start = 0; unsigned long bitmap_maxno, bitmap_no, bitmap_count; @@ -424,7 +428,7 @@ struct page *cma_alloc(struct cma *cma, int count, unsigned int align) * It returns false when provided pages do not belong to contiguous area and * true otherwise. */ -bool cma_release(struct cma *cma, struct page *pages, int count) +bool cma_release(struct cma *cma, const struct page *pages, unsigned int count) { unsigned long pfn; |