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Subject: Re: [PATCH v3 6/7] erofs: remove all likely/unlikely annotations
To:     Gao Xiang <gaoxiang25@huawei.com>
CC:     Dan Carpenter <dan.carpenter@oracle.com>,
        Christoph Hellwig <hch@infradead.org>,
        Joe Perches <joe@perches.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        <devel@driverdev.osuosl.org>, LKML <linux-kernel@vger.kernel.org>,
        <linux-erofs@lists.ozlabs.org>, Chao Yu <chao@kernel.org>,
        Miao Xie <miaoxie@huawei.com>, <weidu.du@huawei.com>,
        "Fang Wei" <fangwei1@huawei.com>
References: <20190830032006.GA20217@architecture4>
 <20190830033643.51019-1-gaoxiang25@huawei.com>
 <20190830033643.51019-6-gaoxiang25@huawei.com>
 <4f2d6464-39f0-4134-f7ba-eec3b09b22d8@huawei.com>
 <20190830063107.GA106716@architecture4>
From:   Chao Yu <yuchao0@huawei.com>
Message-ID: <b048e836-ff37-c1ad-e60d-210ecb56852c@huawei.com>
Date:   Fri, 30 Aug 2019 14:43:31 +0800
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Xiang, the code itself looks clean to me.

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,

On 2019/8/30 14:31, Gao Xiang wrote:
> Hi Chao,
> 
> On Fri, Aug 30, 2019 at 02:25:13PM +0800, Chao Yu wrote:
>> On 2019/8/30 11:36, Gao Xiang wrote:
>>> As Dan Carpenter suggested [1], I have to remove
>>> all erofs likely/unlikely annotations.
>>>
>>> [1] https://lore.kernel.org/linux-fsdevel/20190829154346.GK23584@kadam/
>>> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
>>> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
>>
>> I suggest we can modify this by following good example rather than removing them
>> all, at least, the fuzzed random fields of disk layout handling should be very
>> rare case, I guess it's fine to use unlikely.
>>
>> To Dan, thoughts?
> 
> I think let's stop talking this anymore, I think we can do such
> a commit now and I think "folks have their own thoughts on it".
> 
> Could you kindly review and check this one? I did it by 'sed', could
> you double check it?
> 
> Thanks,
> Gao Xiang
> 
>>
>> Thanks,
>>
>>> ---
>>> no change.
>>>
>>>  fs/erofs/data.c         | 22 ++++++++++-----------
>>>  fs/erofs/decompressor.c |  2 +-
>>>  fs/erofs/dir.c          | 14 ++++++-------
>>>  fs/erofs/inode.c        | 10 +++++-----
>>>  fs/erofs/internal.h     |  4 ++--
>>>  fs/erofs/namei.c        | 14 ++++++-------
>>>  fs/erofs/super.c        | 16 +++++++--------
>>>  fs/erofs/utils.c        | 12 +++++------
>>>  fs/erofs/xattr.c        | 12 +++++------
>>>  fs/erofs/zdata.c        | 44 ++++++++++++++++++++---------------------
>>>  fs/erofs/zmap.c         |  8 ++++----
>>>  fs/erofs/zpvec.h        |  6 +++---
>>>  12 files changed, 82 insertions(+), 82 deletions(-)
>>>
>>> diff --git a/fs/erofs/data.c b/fs/erofs/data.c
>>> index fda16ec8863e..0f2f1a839372 100644
>>> --- a/fs/erofs/data.c
>>> +++ b/fs/erofs/data.c
>>> @@ -27,7 +27,7 @@ static inline void read_endio(struct bio *bio)
>>>  		/* page is already locked */
>>>  		DBG_BUGON(PageUptodate(page));
>>>  
>>> -		if (unlikely(err))
>>> +		if (err)
>>>  			SetPageError(page);
>>>  		else
>>>  			SetPageUptodate(page);
>>> @@ -53,7 +53,7 @@ struct page *__erofs_get_meta_page(struct super_block *sb,
>>>  
>>>  repeat:
>>>  	page = find_or_create_page(mapping, blkaddr, gfp);
>>> -	if (unlikely(!page)) {
>>> +	if (!page) {
>>>  		DBG_BUGON(nofail);
>>>  		return ERR_PTR(-ENOMEM);
>>>  	}
>>> @@ -70,7 +70,7 @@ struct page *__erofs_get_meta_page(struct super_block *sb,
>>>  		}
>>>  
>>>  		err = bio_add_page(bio, page, PAGE_SIZE, 0);
>>> -		if (unlikely(err != PAGE_SIZE)) {
>>> +		if (err != PAGE_SIZE) {
>>>  			err = -EFAULT;
>>>  			goto err_out;
>>>  		}
>>> @@ -81,7 +81,7 @@ struct page *__erofs_get_meta_page(struct super_block *sb,
>>>  		lock_page(page);
>>>  
>>>  		/* this page has been truncated by others */
>>> -		if (unlikely(page->mapping != mapping)) {
>>> +		if (page->mapping != mapping) {
>>>  unlock_repeat:
>>>  			unlock_page(page);
>>>  			put_page(page);
>>> @@ -89,7 +89,7 @@ struct page *__erofs_get_meta_page(struct super_block *sb,
>>>  		}
>>>  
>>>  		/* more likely a read error */
>>> -		if (unlikely(!PageUptodate(page))) {
>>> +		if (!PageUptodate(page)) {
>>>  			if (io_retries) {
>>>  				--io_retries;
>>>  				goto unlock_repeat;
>>> @@ -120,7 +120,7 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
>>>  	nblocks = DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
>>>  	lastblk = nblocks - is_inode_flat_inline(inode);
>>>  
>>> -	if (unlikely(offset >= inode->i_size)) {
>>> +	if (offset >= inode->i_size) {
>>>  		/* leave out-of-bound access unmapped */
>>>  		map->m_flags = 0;
>>>  		map->m_plen = 0;
>>> @@ -170,7 +170,7 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
>>>  int erofs_map_blocks(struct inode *inode,
>>>  		     struct erofs_map_blocks *map, int flags)
>>>  {
>>> -	if (unlikely(is_inode_layout_compression(inode))) {
>>> +	if (is_inode_layout_compression(inode)) {
>>>  		int err = z_erofs_map_blocks_iter(inode, map, flags);
>>>  
>>>  		if (map->mpage) {
>>> @@ -218,11 +218,11 @@ static inline struct bio *erofs_read_raw_page(struct bio *bio,
>>>  		unsigned int blkoff;
>>>  
>>>  		err = erofs_map_blocks(inode, &map, EROFS_GET_BLOCKS_RAW);
>>> -		if (unlikely(err))
>>> +		if (err)
>>>  			goto err_out;
>>>  
>>>  		/* zero out the holed page */
>>> -		if (unlikely(!(map.m_flags & EROFS_MAP_MAPPED))) {
>>> +		if (!(map.m_flags & EROFS_MAP_MAPPED)) {
>>>  			zero_user_segment(page, 0, PAGE_SIZE);
>>>  			SetPageUptodate(page);
>>>  
>>> @@ -315,7 +315,7 @@ static inline struct bio *erofs_read_raw_page(struct bio *bio,
>>>  submit_bio_out:
>>>  		__submit_bio(bio, REQ_OP_READ, 0);
>>>  
>>> -	return unlikely(err) ? ERR_PTR(err) : NULL;
>>> +	return err ? ERR_PTR(err) : NULL;
>>>  }
>>>  
>>>  /*
>>> @@ -377,7 +377,7 @@ static int erofs_raw_access_readpages(struct file *filp,
>>>  	DBG_BUGON(!list_empty(pages));
>>>  
>>>  	/* the rare case (end in gaps) */
>>> -	if (unlikely(bio))
>>> +	if (bio)
>>>  		__submit_bio(bio, REQ_OP_READ, 0);
>>>  	return 0;
>>>  }
>>> diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c
>>> index 5f4b7f302863..df349888f911 100644
>>> --- a/fs/erofs/decompressor.c
>>> +++ b/fs/erofs/decompressor.c
>>> @@ -78,7 +78,7 @@ static int lz4_prepare_destpages(struct z_erofs_decompress_req *rq,
>>>  			get_page(victim);
>>>  		} else {
>>>  			victim = erofs_allocpage(pagepool, GFP_KERNEL, false);
>>> -			if (unlikely(!victim))
>>> +			if (!victim)
>>>  				return -ENOMEM;
>>>  			victim->mapping = Z_EROFS_MAPPING_STAGING;
>>>  		}
>>> diff --git a/fs/erofs/dir.c b/fs/erofs/dir.c
>>> index 1976e60e5174..6a5b43f7fb29 100644
>>> --- a/fs/erofs/dir.c
>>> +++ b/fs/erofs/dir.c
>>> @@ -45,8 +45,8 @@ static int erofs_fill_dentries(struct inode *dir, struct dir_context *ctx,
>>>  			de_namelen = le16_to_cpu(de[1].nameoff) - nameoff;
>>>  
>>>  		/* a corrupted entry is found */
>>> -		if (unlikely(nameoff + de_namelen > maxsize ||
>>> -			     de_namelen > EROFS_NAME_LEN)) {
>>> +		if (nameoff + de_namelen > maxsize ||
>>> +		    de_namelen > EROFS_NAME_LEN) {
>>>  			errln("bogus dirent @ nid %llu", EROFS_V(dir)->nid);
>>>  			DBG_BUGON(1);
>>>  			return -EFSCORRUPTED;
>>> @@ -94,8 +94,8 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx)
>>>  
>>>  		nameoff = le16_to_cpu(de->nameoff);
>>>  
>>> -		if (unlikely(nameoff < sizeof(struct erofs_dirent) ||
>>> -			     nameoff >= PAGE_SIZE)) {
>>> +		if (nameoff < sizeof(struct erofs_dirent) ||
>>> +		    nameoff >= PAGE_SIZE) {
>>>  			errln("%s, invalid de[0].nameoff %u @ nid %llu",
>>>  			      __func__, nameoff, EROFS_V(dir)->nid);
>>>  			err = -EFSCORRUPTED;
>>> @@ -106,11 +106,11 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx)
>>>  				dirsize - ctx->pos + ofs, PAGE_SIZE);
>>>  
>>>  		/* search dirents at the arbitrary position */
>>> -		if (unlikely(initial)) {
>>> +		if (initial) {
>>>  			initial = false;
>>>  
>>>  			ofs = roundup(ofs, sizeof(struct erofs_dirent));
>>> -			if (unlikely(ofs >= nameoff))
>>> +			if (ofs >= nameoff)
>>>  				goto skip_this;
>>>  		}
>>>  
>>> @@ -123,7 +123,7 @@ static int erofs_readdir(struct file *f, struct dir_context *ctx)
>>>  
>>>  		ctx->pos = blknr_to_addr(i) + ofs;
>>>  
>>> -		if (unlikely(err))
>>> +		if (err)
>>>  			break;
>>>  		++i;
>>>  		ofs = 0;
>>> diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
>>> index cf31554075c9..871a6d8ed6f9 100644
>>> --- a/fs/erofs/inode.c
>>> +++ b/fs/erofs/inode.c
>>> @@ -18,7 +18,7 @@ static int read_inode(struct inode *inode, void *data)
>>>  
>>>  	vi->datamode = __inode_data_mapping(advise);
>>>  
>>> -	if (unlikely(vi->datamode >= EROFS_INODE_LAYOUT_MAX)) {
>>> +	if (vi->datamode >= EROFS_INODE_LAYOUT_MAX) {
>>>  		errln("unsupported data mapping %u of nid %llu",
>>>  		      vi->datamode, vi->nid);
>>>  		DBG_BUGON(1);
>>> @@ -133,13 +133,13 @@ static int fill_inline_data(struct inode *inode, void *data,
>>>  	if (S_ISLNK(inode->i_mode) && inode->i_size < PAGE_SIZE) {
>>>  		char *lnk = erofs_kmalloc(sbi, inode->i_size + 1, GFP_KERNEL);
>>>  
>>> -		if (unlikely(!lnk))
>>> +		if (!lnk)
>>>  			return -ENOMEM;
>>>  
>>>  		m_pofs += vi->inode_isize + vi->xattr_isize;
>>>  
>>>  		/* inline symlink data shouldn't across page boundary as well */
>>> -		if (unlikely(m_pofs + inode->i_size > PAGE_SIZE)) {
>>> +		if (m_pofs + inode->i_size > PAGE_SIZE) {
>>>  			kfree(lnk);
>>>  			errln("inline data cross block boundary @ nid %llu",
>>>  			      vi->nid);
>>> @@ -268,7 +268,7 @@ struct inode *erofs_iget(struct super_block *sb,
>>>  {
>>>  	struct inode *inode = erofs_iget_locked(sb, nid);
>>>  
>>> -	if (unlikely(!inode))
>>> +	if (!inode)
>>>  		return ERR_PTR(-ENOMEM);
>>>  
>>>  	if (inode->i_state & I_NEW) {
>>> @@ -278,7 +278,7 @@ struct inode *erofs_iget(struct super_block *sb,
>>>  		vi->nid = nid;
>>>  
>>>  		err = fill_inode(inode, isdir);
>>> -		if (likely(!err))
>>> +		if (!err)
>>>  			unlock_new_inode(inode);
>>>  		else {
>>>  			iget_failed(inode);
>>> diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
>>> index 620b73fcc416..141ea424587d 100644
>>> --- a/fs/erofs/internal.h
>>> +++ b/fs/erofs/internal.h
>>> @@ -424,7 +424,7 @@ static inline struct bio *erofs_grab_bio(struct super_block *sb,
>>>  	do {
>>>  		if (nr_pages == 1) {
>>>  			bio = bio_alloc(gfp | (nofail ? __GFP_NOFAIL : 0), 1);
>>> -			if (unlikely(!bio)) {
>>> +			if (!bio) {
>>>  				DBG_BUGON(nofail);
>>>  				return ERR_PTR(-ENOMEM);
>>>  			}
>>> @@ -432,7 +432,7 @@ static inline struct bio *erofs_grab_bio(struct super_block *sb,
>>>  		}
>>>  		bio = bio_alloc(gfp, nr_pages);
>>>  		nr_pages /= 2;
>>> -	} while (unlikely(!bio));
>>> +	} while (!bio);
>>>  
>>>  	bio->bi_end_io = endio;
>>>  	bio_set_dev(bio, sb->s_bdev);
>>> diff --git a/fs/erofs/namei.c b/fs/erofs/namei.c
>>> index 8832b5d95d91..c1068ad0535e 100644
>>> --- a/fs/erofs/namei.c
>>> +++ b/fs/erofs/namei.c
>>> @@ -64,7 +64,7 @@ static struct erofs_dirent *find_target_dirent(struct erofs_qstr *name,
>>>  		unsigned int matched = min(startprfx, endprfx);
>>>  		struct erofs_qstr dname = {
>>>  			.name = data + nameoff,
>>> -			.end = unlikely(mid >= ndirents - 1) ?
>>> +			.end = mid >= ndirents - 1 ?
>>>  				data + dirblksize :
>>>  				data + nameoff_from_disk(de[mid + 1].nameoff,
>>>  							 dirblksize)
>>> @@ -73,7 +73,7 @@ static struct erofs_dirent *find_target_dirent(struct erofs_qstr *name,
>>>  		/* string comparison without already matched prefix */
>>>  		int ret = dirnamecmp(name, &dname, &matched);
>>>  
>>> -		if (unlikely(!ret)) {
>>> +		if (!ret) {
>>>  			return de + mid;
>>>  		} else if (ret > 0) {
>>>  			head = mid + 1;
>>> @@ -113,7 +113,7 @@ static struct page *find_target_block_classic(struct inode *dir,
>>>  			unsigned int matched;
>>>  			struct erofs_qstr dname;
>>>  
>>> -			if (unlikely(!ndirents)) {
>>> +			if (!ndirents) {
>>>  				kunmap_atomic(de);
>>>  				put_page(page);
>>>  				errln("corrupted dir block %d @ nid %llu",
>>> @@ -137,7 +137,7 @@ static struct page *find_target_block_classic(struct inode *dir,
>>>  			diff = dirnamecmp(name, &dname, &matched);
>>>  			kunmap_atomic(de);
>>>  
>>> -			if (unlikely(!diff)) {
>>> +			if (!diff) {
>>>  				*_ndirents = 0;
>>>  				goto out;
>>>  			} else if (diff > 0) {
>>> @@ -174,7 +174,7 @@ int erofs_namei(struct inode *dir,
>>>  	struct erofs_dirent *de;
>>>  	struct erofs_qstr qn;
>>>  
>>> -	if (unlikely(!dir->i_size))
>>> +	if (!dir->i_size)
>>>  		return -ENOENT;
>>>  
>>>  	qn.name = name->name;
>>> @@ -221,7 +221,7 @@ static struct dentry *erofs_lookup(struct inode *dir,
>>>  	trace_erofs_lookup(dir, dentry, flags);
>>>  
>>>  	/* file name exceeds fs limit */
>>> -	if (unlikely(dentry->d_name.len > EROFS_NAME_LEN))
>>> +	if (dentry->d_name.len > EROFS_NAME_LEN)
>>>  		return ERR_PTR(-ENAMETOOLONG);
>>>  
>>>  	/* false uninitialized warnings on gcc 4.8.x */
>>> @@ -230,7 +230,7 @@ static struct dentry *erofs_lookup(struct inode *dir,
>>>  	if (err == -ENOENT) {
>>>  		/* negative dentry */
>>>  		inode = NULL;
>>> -	} else if (unlikely(err)) {
>>> +	} else if (err) {
>>>  		inode = ERR_PTR(err);
>>>  	} else {
>>>  		debugln("%s, %s (nid %llu) found, d_type %u", __func__,
>>> diff --git a/fs/erofs/super.c b/fs/erofs/super.c
>>> index 556aae5426d6..0c412de33315 100644
>>> --- a/fs/erofs/super.c
>>> +++ b/fs/erofs/super.c
>>> @@ -92,7 +92,7 @@ static int superblock_read(struct super_block *sb)
>>>  
>>>  	blkszbits = layout->blkszbits;
>>>  	/* 9(512 bytes) + LOG_SECTORS_PER_BLOCK == LOG_BLOCK_SIZE */
>>> -	if (unlikely(blkszbits != LOG_BLOCK_SIZE)) {
>>> +	if (blkszbits != LOG_BLOCK_SIZE) {
>>>  		errln("blksize %u isn't supported on this platform",
>>>  		      1 << blkszbits);
>>>  		goto out;
>>> @@ -364,7 +364,7 @@ static int erofs_init_managed_cache(struct super_block *sb)
>>>  	struct erofs_sb_info *const sbi = EROFS_SB(sb);
>>>  	struct inode *const inode = new_inode(sb);
>>>  
>>> -	if (unlikely(!inode))
>>> +	if (!inode)
>>>  		return -ENOMEM;
>>>  
>>>  	set_nlink(inode, 1);
>>> @@ -391,13 +391,13 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
>>>  
>>>  	sb->s_magic = EROFS_SUPER_MAGIC;
>>>  
>>> -	if (unlikely(!sb_set_blocksize(sb, EROFS_BLKSIZ))) {
>>> +	if (!sb_set_blocksize(sb, EROFS_BLKSIZ)) {
>>>  		errln("failed to set erofs blksize");
>>>  		return -EINVAL;
>>>  	}
>>>  
>>>  	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
>>> -	if (unlikely(!sbi))
>>> +	if (!sbi)
>>>  		return -ENOMEM;
>>>  
>>>  	sb->s_fs_info = sbi;
>>> @@ -418,7 +418,7 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
>>>  	default_options(sbi);
>>>  
>>>  	err = parse_options(sb, data);
>>> -	if (unlikely(err))
>>> +	if (err)
>>>  		return err;
>>>  
>>>  	if (!silent)
>>> @@ -438,7 +438,7 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
>>>  	if (IS_ERR(inode))
>>>  		return PTR_ERR(inode);
>>>  
>>> -	if (unlikely(!S_ISDIR(inode->i_mode))) {
>>> +	if (!S_ISDIR(inode->i_mode)) {
>>>  		errln("rootino(nid %llu) is not a directory(i_mode %o)",
>>>  		      ROOT_NID(sbi), inode->i_mode);
>>>  		iput(inode);
>>> @@ -446,13 +446,13 @@ static int erofs_fill_super(struct super_block *sb, void *data, int silent)
>>>  	}
>>>  
>>>  	sb->s_root = d_make_root(inode);
>>> -	if (unlikely(!sb->s_root))
>>> +	if (!sb->s_root)
>>>  		return -ENOMEM;
>>>  
>>>  	erofs_shrinker_register(sb);
>>>  	/* sb->s_umount is already locked, SB_ACTIVE and SB_BORN are not set */
>>>  	err = erofs_init_managed_cache(sb);
>>> -	if (unlikely(err))
>>> +	if (err)
>>>  		return err;
>>>  
>>>  	if (!silent)
>>> diff --git a/fs/erofs/utils.c b/fs/erofs/utils.c
>>> index 1dd041aa0f5a..d92b3e753a6f 100644
>>> --- a/fs/erofs/utils.c
>>> +++ b/fs/erofs/utils.c
>>> @@ -46,14 +46,14 @@ static int erofs_workgroup_get(struct erofs_workgroup *grp)
>>>  
>>>  repeat:
>>>  	o = erofs_wait_on_workgroup_freezed(grp);
>>> -	if (unlikely(o <= 0))
>>> +	if (o <= 0)
>>>  		return -1;
>>>  
>>> -	if (unlikely(atomic_cmpxchg(&grp->refcount, o, o + 1) != o))
>>> +	if (atomic_cmpxchg(&grp->refcount, o, o + 1) != o)
>>>  		goto repeat;
>>>  
>>>  	/* decrease refcount paired by erofs_workgroup_put */
>>> -	if (unlikely(o == 1))
>>> +	if (o == 1)
>>>  		atomic_long_dec(&erofs_global_shrink_cnt);
>>>  	return 0;
>>>  }
>>> @@ -91,7 +91,7 @@ int erofs_register_workgroup(struct super_block *sb,
>>>  	int err;
>>>  
>>>  	/* grp shouldn't be broken or used before */
>>> -	if (unlikely(atomic_read(&grp->refcount) != 1)) {
>>> +	if (atomic_read(&grp->refcount) != 1) {
>>>  		DBG_BUGON(1);
>>>  		return -EINVAL;
>>>  	}
>>> @@ -113,7 +113,7 @@ int erofs_register_workgroup(struct super_block *sb,
>>>  	__erofs_workgroup_get(grp);
>>>  
>>>  	err = radix_tree_insert(&sbi->workstn_tree, grp->index, grp);
>>> -	if (unlikely(err))
>>> +	if (err)
>>>  		/*
>>>  		 * it's safe to decrease since the workgroup isn't visible
>>>  		 * and refcount >= 2 (cannot be freezed).
>>> @@ -212,7 +212,7 @@ static unsigned long erofs_shrink_workstation(struct erofs_sb_info *sbi,
>>>  			continue;
>>>  
>>>  		++freed;
>>> -		if (unlikely(!--nr_shrink))
>>> +		if (!--nr_shrink)
>>>  			break;
>>>  	}
>>>  	xa_unlock(&sbi->workstn_tree);
>>> diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c
>>> index 7ef8d4bb45cd..620cbc15f4d0 100644
>>> --- a/fs/erofs/xattr.c
>>> +++ b/fs/erofs/xattr.c
>>> @@ -19,7 +19,7 @@ struct xattr_iter {
>>>  static inline void xattr_iter_end(struct xattr_iter *it, bool atomic)
>>>  {
>>>  	/* the only user of kunmap() is 'init_inode_xattrs' */
>>> -	if (unlikely(!atomic))
>>> +	if (!atomic)
>>>  		kunmap(it->page);
>>>  	else
>>>  		kunmap_atomic(it->kaddr);
>>> @@ -72,7 +72,7 @@ static int init_inode_xattrs(struct inode *inode)
>>>  		ret = -EOPNOTSUPP;
>>>  		goto out_unlock;
>>>  	} else if (vi->xattr_isize < sizeof(struct erofs_xattr_ibody_header)) {
>>> -		if (unlikely(vi->xattr_isize)) {
>>> +		if (vi->xattr_isize) {
>>>  			errln("bogus xattr ibody @ nid %llu", vi->nid);
>>>  			DBG_BUGON(1);
>>>  			ret = -EFSCORRUPTED;
>>> @@ -112,7 +112,7 @@ static int init_inode_xattrs(struct inode *inode)
>>>  	it.ofs += sizeof(struct erofs_xattr_ibody_header);
>>>  
>>>  	for (i = 0; i < vi->xattr_shared_count; ++i) {
>>> -		if (unlikely(it.ofs >= EROFS_BLKSIZ)) {
>>> +		if (it.ofs >= EROFS_BLKSIZ) {
>>>  			/* cannot be unaligned */
>>>  			DBG_BUGON(it.ofs != EROFS_BLKSIZ);
>>>  			xattr_iter_end(&it, atomic_map);
>>> @@ -189,7 +189,7 @@ static int inline_xattr_iter_begin(struct xattr_iter *it,
>>>  	unsigned int xattr_header_sz, inline_xattr_ofs;
>>>  
>>>  	xattr_header_sz = inlinexattr_header_size(inode);
>>> -	if (unlikely(xattr_header_sz >= vi->xattr_isize)) {
>>> +	if (xattr_header_sz >= vi->xattr_isize) {
>>>  		DBG_BUGON(xattr_header_sz > vi->xattr_isize);
>>>  		return -ENOATTR;
>>>  	}
>>> @@ -234,7 +234,7 @@ static int xattr_foreach(struct xattr_iter *it,
>>>  		unsigned int entry_sz = erofs_xattr_entry_size(&entry);
>>>  
>>>  		/* xattr on-disk corruption: xattr entry beyond xattr_isize */
>>> -		if (unlikely(*tlimit < entry_sz)) {
>>> +		if (*tlimit < entry_sz) {
>>>  			DBG_BUGON(1);
>>>  			return -EFSCORRUPTED;
>>>  		}
>>> @@ -436,7 +436,7 @@ int erofs_getxattr(struct inode *inode, int index,
>>>  	int ret;
>>>  	struct getxattr_iter it;
>>>  
>>> -	if (unlikely(!name))
>>> +	if (!name)
>>>  		return -EINVAL;
>>>  
>>>  	ret = init_inode_xattrs(inode);
>>> diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
>>> index b32ad585237c..653bde0a619a 100644
>>> --- a/fs/erofs/zdata.c
>>> +++ b/fs/erofs/zdata.c
>>> @@ -230,7 +230,7 @@ int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
>>>  		if (!trylock_page(page))
>>>  			return -EBUSY;
>>>  
>>> -		if (unlikely(page->mapping != mapping))
>>> +		if (page->mapping != mapping)
>>>  			continue;
>>>  
>>>  		/* barrier is implied in the following 'unlock_page' */
>>> @@ -358,7 +358,7 @@ static struct z_erofs_collection *cllookup(struct z_erofs_collector *clt,
>>>  	}
>>>  
>>>  	cl = z_erofs_primarycollection(pcl);
>>> -	if (unlikely(cl->pageofs != (map->m_la & ~PAGE_MASK))) {
>>> +	if (cl->pageofs != (map->m_la & ~PAGE_MASK)) {
>>>  		DBG_BUGON(1);
>>>  		erofs_workgroup_put(grp);
>>>  		return ERR_PTR(-EFSCORRUPTED);
>>> @@ -406,7 +406,7 @@ static struct z_erofs_collection *clregister(struct z_erofs_collector *clt,
>>>  
>>>  	/* no available workgroup, let's allocate one */
>>>  	pcl = kmem_cache_alloc(pcluster_cachep, GFP_NOFS);
>>> -	if (unlikely(!pcl))
>>> +	if (!pcl)
>>>  		return ERR_PTR(-ENOMEM);
>>>  
>>>  	init_always(pcl);
>>> @@ -474,7 +474,7 @@ static int z_erofs_collector_begin(struct z_erofs_collector *clt,
>>>  	if (!cl) {
>>>  		cl = clregister(clt, inode, map);
>>>  
>>> -		if (unlikely(cl == ERR_PTR(-EAGAIN)))
>>> +		if (cl == ERR_PTR(-EAGAIN))
>>>  			goto repeat;
>>>  	}
>>>  
>>> @@ -607,15 +607,15 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
>>>  	map->m_la = offset + cur;
>>>  	map->m_llen = 0;
>>>  	err = z_erofs_map_blocks_iter(inode, map, 0);
>>> -	if (unlikely(err))
>>> +	if (err)
>>>  		goto err_out;
>>>  
>>>  restart_now:
>>> -	if (unlikely(!(map->m_flags & EROFS_MAP_MAPPED)))
>>> +	if (!(map->m_flags & EROFS_MAP_MAPPED))
>>>  		goto hitted;
>>>  
>>>  	err = z_erofs_collector_begin(clt, inode, map);
>>> -	if (unlikely(err))
>>> +	if (err)
>>>  		goto err_out;
>>>  
>>>  	/* preload all compressed pages (maybe downgrade role if necessary) */
>>> @@ -630,7 +630,7 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
>>>  	tight &= (clt->mode >= COLLECT_PRIMARY_HOOKED);
>>>  hitted:
>>>  	cur = end - min_t(unsigned int, offset + end - map->m_la, end);
>>> -	if (unlikely(!(map->m_flags & EROFS_MAP_MAPPED))) {
>>> +	if (!(map->m_flags & EROFS_MAP_MAPPED)) {
>>>  		zero_user_segment(page, cur, end);
>>>  		goto next_part;
>>>  	}
>>> @@ -653,11 +653,11 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
>>>  
>>>  		err = z_erofs_attach_page(clt, newpage,
>>>  					  Z_EROFS_PAGE_TYPE_EXCLUSIVE);
>>> -		if (likely(!err))
>>> +		if (!err)
>>>  			goto retry;
>>>  	}
>>>  
>>> -	if (unlikely(err))
>>> +	if (err)
>>>  		goto err_out;
>>>  
>>>  	index = page->index - (map->m_la >> PAGE_SHIFT);
>>> @@ -723,7 +723,7 @@ static inline void z_erofs_vle_read_endio(struct bio *bio)
>>>  		DBG_BUGON(PageUptodate(page));
>>>  		DBG_BUGON(!page->mapping);
>>>  
>>> -		if (unlikely(!sbi && !z_erofs_page_is_staging(page))) {
>>> +		if (!sbi && !z_erofs_page_is_staging(page)) {
>>>  			sbi = EROFS_SB(page->mapping->host->i_sb);
>>>  
>>>  			if (time_to_inject(sbi, FAULT_READ_IO)) {
>>> @@ -736,7 +736,7 @@ static inline void z_erofs_vle_read_endio(struct bio *bio)
>>>  		if (sbi)
>>>  			cachemngd = erofs_page_is_managed(sbi, page);
>>>  
>>> -		if (unlikely(err))
>>> +		if (err)
>>>  			SetPageError(page);
>>>  		else if (cachemngd)
>>>  			SetPageUptodate(page);
>>> @@ -772,7 +772,7 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
>>>  	mutex_lock(&cl->lock);
>>>  	nr_pages = cl->nr_pages;
>>>  
>>> -	if (likely(nr_pages <= Z_EROFS_VMAP_ONSTACK_PAGES)) {
>>> +	if (nr_pages <= Z_EROFS_VMAP_ONSTACK_PAGES) {
>>>  		pages = pages_onstack;
>>>  	} else if (nr_pages <= Z_EROFS_VMAP_GLOBAL_PAGES &&
>>>  		   mutex_trylock(&z_pagemap_global_lock)) {
>>> @@ -787,7 +787,7 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
>>>  				       gfp_flags);
>>>  
>>>  		/* fallback to global pagemap for the lowmem scenario */
>>> -		if (unlikely(!pages)) {
>>> +		if (!pages) {
>>>  			mutex_lock(&z_pagemap_global_lock);
>>>  			pages = z_pagemap_global;
>>>  		}
>>> @@ -823,7 +823,7 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
>>>  		 * currently EROFS doesn't support multiref(dedup),
>>>  		 * so here erroring out one multiref page.
>>>  		 */
>>> -		if (unlikely(pages[pagenr])) {
>>> +		if (pages[pagenr]) {
>>>  			DBG_BUGON(1);
>>>  			SetPageError(pages[pagenr]);
>>>  			z_erofs_onlinepage_endio(pages[pagenr]);
>>> @@ -847,7 +847,7 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
>>>  
>>>  		if (!z_erofs_page_is_staging(page)) {
>>>  			if (erofs_page_is_managed(sbi, page)) {
>>> -				if (unlikely(!PageUptodate(page)))
>>> +				if (!PageUptodate(page))
>>>  					err = -EIO;
>>>  				continue;
>>>  			}
>>> @@ -859,7 +859,7 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
>>>  			pagenr = z_erofs_onlinepage_index(page);
>>>  
>>>  			DBG_BUGON(pagenr >= nr_pages);
>>> -			if (unlikely(pages[pagenr])) {
>>> +			if (pages[pagenr]) {
>>>  				DBG_BUGON(1);
>>>  				SetPageError(pages[pagenr]);
>>>  				z_erofs_onlinepage_endio(pages[pagenr]);
>>> @@ -871,13 +871,13 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
>>>  		}
>>>  
>>>  		/* PG_error needs checking for inplaced and staging pages */
>>> -		if (unlikely(PageError(page))) {
>>> +		if (PageError(page)) {
>>>  			DBG_BUGON(PageUptodate(page));
>>>  			err = -EIO;
>>>  		}
>>>  	}
>>>  
>>> -	if (unlikely(err))
>>> +	if (err)
>>>  		goto out;
>>>  
>>>  	llen = pcl->length >> Z_EROFS_PCLUSTER_LENGTH_BIT;
>>> @@ -926,7 +926,7 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
>>>  		if (z_erofs_put_stagingpage(pagepool, page))
>>>  			continue;
>>>  
>>> -		if (unlikely(err < 0))
>>> +		if (err < 0)
>>>  			SetPageError(page);
>>>  
>>>  		z_erofs_onlinepage_endio(page);
>>> @@ -934,7 +934,7 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
>>>  
>>>  	if (pages == z_pagemap_global)
>>>  		mutex_unlock(&z_pagemap_global_lock);
>>> -	else if (unlikely(pages != pages_onstack))
>>> +	else if (pages != pages_onstack)
>>>  		kvfree(pages);
>>>  
>>>  	cl->nr_pages = 0;
>>> @@ -1212,7 +1212,7 @@ static bool z_erofs_vle_submit_all(struct super_block *sb,
>>>  	bool force_submit = false;
>>>  	unsigned int nr_bios;
>>>  
>>> -	if (unlikely(owned_head == Z_EROFS_PCLUSTER_TAIL))
>>> +	if (owned_head == Z_EROFS_PCLUSTER_TAIL)
>>>  		return false;
>>>  
>>>  	force_submit = false;
>>> diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
>>> index 4dc9cec01297..850e0e3d57a8 100644
>>> --- a/fs/erofs/zmap.c
>>> +++ b/fs/erofs/zmap.c
>>> @@ -348,7 +348,7 @@ static int vle_extent_lookback(struct z_erofs_maprecorder *m,
>>>  
>>>  	switch (m->type) {
>>>  	case Z_EROFS_VLE_CLUSTER_TYPE_NONHEAD:
>>> -		if (unlikely(!m->delta[0])) {
>>> +		if (!m->delta[0]) {
>>>  			errln("invalid lookback distance 0 at nid %llu",
>>>  			      vi->nid);
>>>  			DBG_BUGON(1);
>>> @@ -386,7 +386,7 @@ int z_erofs_map_blocks_iter(struct inode *inode,
>>>  	trace_z_erofs_map_blocks_iter_enter(inode, map, flags);
>>>  
>>>  	/* when trying to read beyond EOF, leave it unmapped */
>>> -	if (unlikely(map->m_la >= inode->i_size)) {
>>> +	if (map->m_la >= inode->i_size) {
>>>  		map->m_llen = map->m_la + 1 - inode->i_size;
>>>  		map->m_la = inode->i_size;
>>>  		map->m_flags = 0;
>>> @@ -420,7 +420,7 @@ int z_erofs_map_blocks_iter(struct inode *inode,
>>>  			break;
>>>  		}
>>>  		/* m.lcn should be >= 1 if endoff < m.clusterofs */
>>> -		if (unlikely(!m.lcn)) {
>>> +		if (!m.lcn) {
>>>  			errln("invalid logical cluster 0 at nid %llu",
>>>  			      vi->nid);
>>>  			err = -EFSCORRUPTED;
>>> @@ -433,7 +433,7 @@ int z_erofs_map_blocks_iter(struct inode *inode,
>>>  	case Z_EROFS_VLE_CLUSTER_TYPE_NONHEAD:
>>>  		/* get the correspoinding first chunk */
>>>  		err = vle_extent_lookback(&m, m.delta[0]);
>>> -		if (unlikely(err))
>>> +		if (err)
>>>  			goto unmap_out;
>>>  		break;
>>>  	default:
>>> diff --git a/fs/erofs/zpvec.h b/fs/erofs/zpvec.h
>>> index bd3cee16491c..58556903aa94 100644
>>> --- a/fs/erofs/zpvec.h
>>> +++ b/fs/erofs/zpvec.h
>>> @@ -111,11 +111,11 @@ static inline bool z_erofs_pagevec_enqueue(struct z_erofs_pagevec_ctor *ctor,
>>>  					   bool *occupied)
>>>  {
>>>  	*occupied = false;
>>> -	if (unlikely(!ctor->next && type))
>>> +	if (!ctor->next && type)
>>>  		if (ctor->index + 1 == ctor->nr)
>>>  			return false;
>>>  
>>> -	if (unlikely(ctor->index >= ctor->nr))
>>> +	if (ctor->index >= ctor->nr)
>>>  		z_erofs_pagevec_ctor_pagedown(ctor, false);
>>>  
>>>  	/* exclusive page type must be 0 */
>>> @@ -137,7 +137,7 @@ z_erofs_pagevec_dequeue(struct z_erofs_pagevec_ctor *ctor,
>>>  {
>>>  	erofs_vtptr_t t;
>>>  
>>> -	if (unlikely(ctor->index >= ctor->nr)) {
>>> +	if (ctor->index >= ctor->nr) {
>>>  		DBG_BUGON(!ctor->next);
>>>  		z_erofs_pagevec_ctor_pagedown(ctor, true);
>>>  	}
>>>
> .
>