Re: [PATCH v3 6/7] erofs: remove all likely/unlikely annotations
From: Gao Xiang
Date: Fri Aug 30 2019 - 02:32:06 EST
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] 20190829154346.GK23584@kadam/">https://lore.kernel.org/linux-fsdevel/20190829154346.GK23584@kadam/
> > Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> > Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx>
>
> 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);
> > }
> >