[PATCH 1/2] erofs: clean up unnecessary code and comments

[Gao Xiang <hsiangkao@linux.alibaba.com>]

Some conditional macros and comments are useless.

Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
---
 fs/erofs/internal.h |  2 --
 fs/erofs/namei.c    | 11 +----------
 fs/erofs/xattr.h    |  2 --
 fs/erofs/zmap.c     |  3 +--
 4 files changed, 2 insertions(+), 16 deletions(-)

diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index a6333c283e3d..0318530bc78a 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -196,7 +196,6 @@ enum {
 	EROFS_ZIP_CACHE_READAROUND
 };
 
-#ifdef CONFIG_EROFS_FS_ZIP
 #define EROFS_LOCKED_MAGIC     (INT_MIN | 0xE0F510CCL)
 
 /* basic unit of the workstation of a super_block */
@@ -236,7 +235,6 @@ static inline int erofs_wait_on_workgroup_freezed(struct erofs_workgroup *grp)
 	return atomic_cond_read_relaxed(&grp->refcount,
 					VAL != EROFS_LOCKED_MAGIC);
 }
-#endif	/* !CONFIG_EROFS_FS_ZIP */
 
 /* we strictly follow PAGE_SIZE and no buffer head yet */
 #define LOG_BLOCK_SIZE		PAGE_SHIFT
diff --git a/fs/erofs/namei.c b/fs/erofs/namei.c
index fd75506799c4..afbb80d4e2f1 100644
--- a/fs/erofs/namei.c
+++ b/fs/erofs/namei.c
@@ -185,7 +185,6 @@ int erofs_namei(struct inode *dir, const struct qstr *name, erofs_nid_t *nid,
 	if (IS_ERR(de))
 		return PTR_ERR(de);
 
-	/* the target page has been mapped */
 	if (ndirents)
 		de = find_target_dirent(&qn, (u8 *)de, EROFS_BLKSIZ, ndirents);
 
@@ -197,9 +196,7 @@ int erofs_namei(struct inode *dir, const struct qstr *name, erofs_nid_t *nid,
 	return PTR_ERR_OR_ZERO(de);
 }
 
-/* NOTE: i_mutex is already held by vfs */
-static struct dentry *erofs_lookup(struct inode *dir,
-				   struct dentry *dentry,
+static struct dentry *erofs_lookup(struct inode *dir, struct dentry *dentry,
 				   unsigned int flags)
 {
 	int err;
@@ -207,17 +204,11 @@ static struct dentry *erofs_lookup(struct inode *dir,
 	unsigned int d_type;
 	struct inode *inode;
 
-	DBG_BUGON(!d_really_is_negative(dentry));
-	/* dentry must be unhashed in lookup, no need to worry about */
-	DBG_BUGON(!d_unhashed(dentry));
-
 	trace_erofs_lookup(dir, dentry, flags);
 
-	/* file name exceeds fs limit */
 	if (dentry->d_name.len > EROFS_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	/* false uninitialized warnings on gcc 4.8.x */
 	err = erofs_namei(dir, &dentry->d_name, &nid, &d_type);
 
 	if (err == -ENOENT) {
diff --git a/fs/erofs/xattr.h b/fs/erofs/xattr.h
index 332462c59f11..0a43c9ee9f8f 100644
--- a/fs/erofs/xattr.h
+++ b/fs/erofs/xattr.h
@@ -39,9 +39,7 @@ static inline unsigned int xattrblock_offset(struct erofs_sb_info *sbi,
 #ifdef CONFIG_EROFS_FS_XATTR
 extern const struct xattr_handler erofs_xattr_user_handler;
 extern const struct xattr_handler erofs_xattr_trusted_handler;
-#ifdef CONFIG_EROFS_FS_SECURITY
 extern const struct xattr_handler erofs_xattr_security_handler;
-#endif
 
 static inline const struct xattr_handler *erofs_xattr_handler(unsigned int idx)
 {
diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
index ccdddb755be8..0a2e41adc78a 100644
--- a/fs/erofs/zmap.c
+++ b/fs/erofs/zmap.c
@@ -743,8 +743,7 @@ static int z_erofs_do_map_blocks(struct inode *inode,
 	return err;
 }
 
-int z_erofs_map_blocks_iter(struct inode *inode,
-			    struct erofs_map_blocks *map,
+int z_erofs_map_blocks_iter(struct inode *inode, struct erofs_map_blocks *map,
 			    int flags)
 {
 	struct erofs_inode *const vi = EROFS_I(inode);
-- 
2.24.4