f2fs: Allocate and stat mem used by free nid bitmap more accurately

This patch used f2fs_bitmap_size macro to calculate mem used by
free nid bitmap, and stat used mem including aligned part.
Signed-off-by: NYunlei He <heyunlei@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/debug.c

@@ -215,7 +215,8 @@ static void update_mem_info(struct f2fs_sb_info *sbi)
 	si->base_mem += sizeof(struct f2fs_nm_info);
 	si->base_mem += __bitmap_size(sbi, NAT_BITMAP);
 	si->base_mem += (NM_I(sbi)->nat_bits_blocks << F2FS_BLKSIZE_BITS);
-	si->base_mem += NM_I(sbi)->nat_blocks * NAT_ENTRY_BITMAP_SIZE;
+	si->base_mem += NM_I(sbi)->nat_blocks *
+				f2fs_bitmap_size(NAT_ENTRY_PER_BLOCK);
 	si->base_mem += NM_I(sbi)->nat_blocks / 8;
 	si->base_mem += NM_I(sbi)->nat_blocks * sizeof(unsigned short);
 

fs/f2fs/node.c

@@ -2797,7 +2797,7 @@ static int init_free_nid_cache(struct f2fs_sb_info *sbi)
 
 	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);
+			f2fs_bitmap_size(NAT_ENTRY_PER_BLOCK), GFP_KERNEL);
 		if (!nm_i->free_nid_bitmap)
 			return -ENOMEM;
 	}

include/linux/f2fs_fs.h

@@ -304,11 +304,6 @@ struct f2fs_node {
  * For NAT entries
  */
 #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 */