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mm: cma: use CMA_MAX_NAME to define the length of cma name array

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CMA_MAX_NAME should be visible to CMA's users as they might need it to set
the name of CMA areas and avoid hardcoding the size locally.
So this patch moves CMA_MAX_NAME from local header file to include/linux
header file and removes the hardcode in both hugetlb.c and contiguous.c.

Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Barry Song 2020-08-24 11:03:09 +12:00 • committed by Christoph Hellwig
parent c6303ab9b9
commit 2281f797f5
4 changed files with 5 additions and 5 deletions
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2
include/linux/cma.h
View file

@ -18,6 +18,8 @@
#endif #endif
#define CMA_MAX_NAME 64
struct cma; struct cma;
extern unsigned long totalcma_pages; extern unsigned long totalcma_pages;

2
kernel/dma/contiguous.c
View file

@ -119,7 +119,7 @@ void __init dma_pernuma_cma_reserve(void)
for_each_online_node(nid) { for_each_online_node(nid) {
int ret; int ret;
char name[20]; char name[CMA_MAX_NAME];
struct cma **cma = &dma_contiguous_pernuma_area[nid]; struct cma **cma = &dma_contiguous_pernuma_area[nid];
snprintf(name, sizeof(name), "pernuma%d", nid); snprintf(name, sizeof(name), "pernuma%d", nid);

2
mm/cma.h
View file

@ -4,8 +4,6 @@
#include <linux/debugfs.h> #include <linux/debugfs.h>
#define CMA_MAX_NAME 64
struct cma { struct cma {
unsigned long base_pfn; unsigned long base_pfn;
unsigned long count; unsigned long count;

4
mm/hugetlb.c
View file

@ -5683,12 +5683,12 @@ void __init hugetlb_cma_reserve(int order)
reserved = 0; reserved = 0;
for_each_node_state(nid, N_ONLINE) { for_each_node_state(nid, N_ONLINE) {
int res; int res;
char name[20]; char name[CMA_MAX_NAME];
size = min(per_node, hugetlb_cma_size - reserved); size = min(per_node, hugetlb_cma_size - reserved);
size = round_up(size, PAGE_SIZE << order); size = round_up(size, PAGE_SIZE << order);
snprintf(name, 20, "hugetlb%d", nid); snprintf(name, sizeof(name), "hugetlb%d", nid);
res = cma_declare_contiguous_nid(0, size, 0, PAGE_SIZE << order, res = cma_declare_contiguous_nid(0, size, 0, PAGE_SIZE << order,
0, false, name, 0, false, name,
&hugetlb_cma[nid], nid); &hugetlb_cma[nid], nid);