f2fs: fix inconsistent comments
Lack of maintenance on comments may mislead developers, fix them.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 9c88fb3..0dea31f 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -50,9 +50,6 @@
return page;
}
-/*
- * We guarantee no failure on the returned page.
- */
static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
bool is_meta)
{
@@ -206,7 +203,7 @@
}
/*
- * Readahead CP/NAT/SIT/SSA pages
+ * Readahead CP/NAT/SIT/SSA/POR pages
*/
int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
int type, bool sync)
@@ -898,7 +895,7 @@
return -ENOMEM;
/*
* Finding out valid cp block involves read both
- * sets( cp pack1 and cp pack 2)
+ * sets( cp pack 1 and cp pack 2)
*/
cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
@@ -1385,10 +1382,7 @@
/* Flush all the NAT/SIT pages */
f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
- /*
- * modify checkpoint
- * version number is already updated
- */
+ /* start to update checkpoint, cp ver is already updated previously */
ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true));
ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
@@ -1541,9 +1535,6 @@
return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0;
}
-/*
- * We guarantee that this checkpoint procedure will not fail.
- */
int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
@@ -1611,7 +1602,6 @@
f2fs_flush_sit_entries(sbi, cpc);
- /* unlock all the fs_lock[] in do_checkpoint() */
err = do_checkpoint(sbi, cpc);
if (err)
f2fs_release_discard_addrs(sbi);
@@ -1624,7 +1614,7 @@
if (cpc->reason & CP_RECOVERY)
f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
- /* do checkpoint periodically */
+ /* update CP_TIME to trigger checkpoint periodically */
f2fs_update_time(sbi, CP_TIME);
trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
out:
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index e5dc1eb..cd388e7 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -364,9 +364,6 @@
bio_put(bio);
}
-/*
- * Return true, if pre_bio's bdev is same as its target device.
- */
struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
block_t blk_addr, struct bio *bio)
{
@@ -403,6 +400,9 @@
return 0;
}
+/*
+ * Return true, if pre_bio's bdev is same as its target device.
+ */
static bool __same_bdev(struct f2fs_sb_info *sbi,
block_t blk_addr, struct bio *bio)
{
@@ -410,9 +410,6 @@
return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
}
-/*
- * Low-level block read/write IO operations.
- */
static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
{
struct f2fs_sb_info *sbi = fio->sbi;
@@ -1388,13 +1385,9 @@
}
/*
- * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
- * f2fs_map_blocks structure.
- * If original data blocks are allocated, then give them to blockdev.
- * Otherwise,
- * a. preallocate requested block addresses
- * b. do not use extent cache for better performance
- * c. give the block addresses to blockdev
+ * f2fs_map_blocks() tries to find or build mapping relationship which
+ * maps continuous logical blocks to physical blocks, and return such
+ * info via f2fs_map_blocks structure.
*/
int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
int create, int flag)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 43900c1..760a05f 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2388,9 +2388,9 @@
raw_node = F2FS_NODE(node_page);
- /* from GC path only */
if (is_inode) {
if (!inode)
+ /* from GC path only */
base = offset_in_addr(&raw_node->i);
else if (f2fs_has_extra_attr(inode))
base = get_extra_isize(inode);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 867bd6e..8c72511 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -112,7 +112,6 @@
}
}
- /* fill the page */
f2fs_wait_on_page_writeback(page, DATA, false, true);
/* wait for GCed page writeback via META_MAPPING */
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index db8725d..608d049 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -192,7 +192,10 @@
p->ofs_unit = sbi->segs_per_sec;
}
- /* we need to check every dirty segments in the FG_GC case */
+ /*
+ * adjust candidates range, should select all dirty segments for
+ * foreground GC and urgent GC cases.
+ */
if (gc_type != FG_GC &&
(sbi->gc_mode != GC_URGENT) &&
p->max_search > sbi->max_victim_search)
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 9b49832..45aff90 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -776,7 +776,7 @@
else
f2fs_inode_synced(inode);
- /* ino == 0, if f2fs_new_inode() was failed t*/
+ /* for the case f2fs_new_inode() was failed, .i_ino is zero, skip it */
if (inode->i_ino)
invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
inode->i_ino);
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 2aa0354..b75c708 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -177,7 +177,7 @@
}
/*
- * Set multimedia files as cold files for hot/cold data separation
+ * Set file's temperature for hot/cold data separation
*/
static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
const unsigned char *name)
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index d29774d..6006802 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -510,9 +510,6 @@
return nr - nr_shrink;
}
-/*
- * This function always returns success
- */
int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
struct node_info *ni)
{
@@ -716,8 +713,7 @@
/*
* Caller should call f2fs_put_dnode(dn).
* Also, it should grab and release a rwsem by calling f2fs_lock_op() and
- * f2fs_unlock_op() only if ro is not set RDONLY_NODE.
- * In the case of RDONLY_NODE, we don't need to care about mutex.
+ * f2fs_unlock_op() only if mode is set with ALLOC_NODE.
*/
int f2fs_get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
{
diff --git a/fs/f2fs/shrinker.c b/fs/f2fs/shrinker.c
index a467aca..d66de599 100644
--- a/fs/f2fs/shrinker.c
+++ b/fs/f2fs/shrinker.c
@@ -58,7 +58,7 @@
/* count extent cache entries */
count += __count_extent_cache(sbi);
- /* shrink clean nat cache entries */
+ /* count clean nat cache entries */
count += __count_nat_entries(sbi);
/* count free nids cache entries */
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index ca34c21..dcf9042 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1658,7 +1658,7 @@
out_unlock:
up_write(&sbi->gc_lock);
restore_flag:
- sbi->sb->s_flags = s_flags; /* Restore MS_RDONLY status */
+ sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
return err;
}
@@ -3590,7 +3590,7 @@
f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
}
#endif
- /* if there are nt orphan nodes free them */
+ /* if there are any orphan inodes, free them */
err = f2fs_recover_orphan_inodes(sbi);
if (err)
goto free_meta;
