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authorGu Zheng <guz.fnst@cn.fujitsu.com>2014-10-20 17:45:50 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2014-11-03 16:07:36 -0800
commitc6ac4c0ec416e77cab09cac6cee2d100fbd7fc82 (patch)
tree24dd196ef82d5a87dc683640fb5366a1d27e19ba
parentfa528722d06ecbee9d918b9eec58c5d4c2978839 (diff)
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>
-rw-r--r--fs/f2fs/f2fs.h9
-rw-r--r--fs/f2fs/node.h5
-rw-r--r--fs/f2fs/segment.h5
3 files changed, 11 insertions, 8 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 3608c13aa7a2..60045a24f0d5 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -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 */
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 8d5e6e0dd840..acb71e507a7a 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -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,
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 2495bec1c621..6723ccc17585 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -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)