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f2fs: introduce f2fs_change_bit to simplify the change bit logic

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Introduce f2fs_change_bit to simplify the change bit logic in
function set_to_next_nat{sit}.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Gu Zheng 2014-10-20 17:45:50 +08:00 committed by Jaegeuk Kim
parent fa528722d0
commit c6ac4c0ec4
3 changed files with 11 additions and 8 deletions
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9
fs/f2fs/f2fs.h
View file

@ -1073,6 +1073,15 @@ static inline int f2fs_clear_bit(unsigned int nr, char *addr)
return ret;
}
static inline void f2fs_change_bit(unsigned int nr, char *addr)
{
int mask;
addr += (nr >> 3);
mask = 1 << (7 - (nr & 0x07));
*addr ^= mask;
}
/* used for f2fs_inode_info->flags */
enum {
FI_NEW_INODE, /* indicate newly allocated inode */

5
fs/f2fs/node.h
View file

@ -192,10 +192,7 @@ static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
{
unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
f2fs_clear_bit(block_off, nm_i->nat_bitmap);
else
f2fs_set_bit(block_off, nm_i->nat_bitmap);
f2fs_change_bit(block_off, nm_i->nat_bitmap);
}
static inline void fill_node_footer(struct page *page, nid_t nid,

5
fs/f2fs/segment.h
View file

@ -657,10 +657,7 @@ static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start)
{
unsigned int block_off = SIT_BLOCK_OFFSET(start);
if (f2fs_test_bit(block_off, sit_i->sit_bitmap))
f2fs_clear_bit(block_off, sit_i->sit_bitmap);
else
f2fs_set_bit(block_off, sit_i->sit_bitmap);
f2fs_change_bit(block_off, sit_i->sit_bitmap);
}
static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi)