f2fs: introduce f2fs_change_bit to simplify the change bit logic
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>
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 3608c13..60045a2 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1073,6 +1073,15 @@
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 */
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 8d5e6e0d..acb71e5 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -192,10 +192,7 @@
{
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,
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 2495bec..6723ccc 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -657,10 +657,7 @@
{
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)