redonkable/remarkable-linux
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f2fs: align memory boundary for bitops

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For example, in arm64, free_nid_bitmap should be aligned to word size in order
to use bit operations.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2018-03-09 17:42:28 -08:00
parent c56675750d
commit bb1105e479
3 changed files with 22 additions and 4 deletions
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2
fs/f2fs/f2fs.h
View file

@ -766,7 +766,7 @@ struct f2fs_nm_info {
unsigned int nid_cnt[MAX_NID_STATE]; /* the number of free node id */
spinlock_t nid_list_lock; /* protect nid lists ops */
struct mutex build_lock; /* lock for build free nids */
unsigned char (*free_nid_bitmap)[NAT_ENTRY_BITMAP_SIZE];
unsigned char **free_nid_bitmap;
unsigned char *nat_block_bitmap;
unsigned short *free_nid_count; /* free nid count of NAT block */

20
fs/f2fs/node.c
View file

@ -2708,12 +2708,20 @@ static int init_node_manager(struct f2fs_sb_info *sbi)
static int init_free_nid_cache(struct f2fs_sb_info *sbi)
{
struct f2fs_nm_info *nm_i = NM_I(sbi);
int i;
nm_i->free_nid_bitmap = f2fs_kvzalloc(sbi, nm_i->nat_blocks *
NAT_ENTRY_BITMAP_SIZE, GFP_KERNEL);
nm_i->free_nid_bitmap = f2fs_kzalloc(sbi, nm_i->nat_blocks *
sizeof(unsigned char *), GFP_KERNEL);
if (!nm_i->free_nid_bitmap)
return -ENOMEM;
for (i = 0; i < nm_i->nat_blocks; i++) {
nm_i->free_nid_bitmap[i] = f2fs_kvzalloc(sbi,
NAT_ENTRY_BITMAP_SIZE_ALIGNED, GFP_KERNEL);
if (!nm_i->free_nid_bitmap)
return -ENOMEM;
}
nm_i->nat_block_bitmap = f2fs_kvzalloc(sbi, nm_i->nat_blocks / 8,
GFP_KERNEL);
if (!nm_i->nat_block_bitmap)
@ -2804,7 +2812,13 @@ void destroy_node_manager(struct f2fs_sb_info *sbi)
up_write(&nm_i->nat_tree_lock);
kvfree(nm_i->nat_block_bitmap);
kvfree(nm_i->free_nid_bitmap);
if (nm_i->free_nid_bitmap) {
int i;
for (i = 0; i < nm_i->nat_blocks; i++)
kvfree(nm_i->free_nid_bitmap[i]);
kfree(nm_i->free_nid_bitmap);
}
kvfree(nm_i->free_nid_count);
kfree(nm_i->nat_bitmap);

4
include/linux/f2fs_fs.h
View file

@ -305,6 +305,10 @@ struct f2fs_node {
*/
#define NAT_ENTRY_PER_BLOCK (PAGE_SIZE / sizeof(struct f2fs_nat_entry))
#define NAT_ENTRY_BITMAP_SIZE ((NAT_ENTRY_PER_BLOCK + 7) / 8)
#define NAT_ENTRY_BITMAP_SIZE_ALIGNED \
((NAT_ENTRY_BITMAP_SIZE + BITS_PER_LONG - 1) / \
BITS_PER_LONG * BITS_PER_LONG)
struct f2fs_nat_entry {
__u8 version; /* latest version of cached nat entry */