[PATCH 4/8] shmem: trivial tidyups, removing extra blank lines, etc

Hugh Dickins
2023-09-30T03:28:59Z

Mostly removing a few superfluous blank lines, joining short arglines,
imposing some 80-column observance, correcting a couple of comments.
None of it more interesting than deleting a repeated INIT_LIST_HEAD().

Signed-off-by: Hugh Dickins <hughd@google.com>
---
mm/shmem.c | 56 ++++++++++++++++++++----------------------------------
1 file changed, 21 insertions(+), 35 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 5501a5bc8d8c..caee8ba841f7 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -756,7 +756,7 @@ static unsigned long shmem_unused_huge_shrink(struct shmem_sb_info *sbinfo,
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */

/*
- * Like filemap_add_folio, but error if expected item has gone.
+ * Somewhat like filemap_add_folio, but error if expected item has gone.
*/
static int shmem_add_to_page_cache(struct folio *folio,
struct address_space *mapping,
@@ -825,7 +825,7 @@ static int shmem_add_to_page_cache(struct folio *folio,
}

/*
- * Like delete_from_page_cache, but substitutes swap for @folio.
+ * Somewhat like filemap_remove_folio, but substitutes swap for @folio.
*/
static void shmem_delete_from_page_cache(struct folio *folio, void *radswap)
{
@@ -887,7 +887,6 @@ unsigned long shmem_partial_swap_usage(struct address_space *mapping,
cond_resched_rcu();
}
}
-
rcu_read_unlock();

return swapped << PAGE_SHIFT;
@@ -1213,7 +1212,6 @@ static int shmem_setattr(struct mnt_idmap *idmap,
if (i_uid_needs_update(idmap, attr, inode) ||
i_gid_needs_update(idmap, attr, inode)) {
error = dquot_transfer(idmap, inode, attr);
-
if (error)
return error;
}
@@ -2456,7 +2454,6 @@ static struct inode *__shmem_get_inode(struct mnt_idmap *idmap,
if (err)
return ERR_PTR(err);

-
inode = new_inode(sb);
if (!inode) {
shmem_free_inode(sb, 0);
@@ -2481,11 +2478,10 @@ static struct inode *__shmem_get_inode(struct mnt_idmap *idmap,
shmem_set_inode_flags(inode, info->fsflags);
INIT_LIST_HEAD(&info->shrinklist);
INIT_LIST_HEAD(&info->swaplist);
- INIT_LIST_HEAD(&info->swaplist);
- if (sbinfo->noswap)
- mapping_set_unevictable(inode->i_mapping);
simple_xattrs_init(&info->xattrs);
cache_no_acl(inode);
+ if (sbinfo->noswap)
+ mapping_set_unevictable(inode->i_mapping);
mapping_set_large_folios(inode->i_mapping);

switch (mode & S_IFMT) {
@@ -2697,7 +2693,6 @@ shmem_write_begin(struct file *file, struct address_space *mapping,
}

ret = shmem_get_folio(inode, index, &folio, SGP_WRITE);
-
if (ret)
return ret;

@@ -3229,8 +3224,7 @@ shmem_mknod(struct mnt_idmap *idmap, struct inode *dir,
error = simple_acl_create(dir, inode);
if (error)
goto out_iput;
- error = security_inode_init_security(inode, dir,
- &dentry->d_name,
+ error = security_inode_init_security(inode, dir, &dentry->d_name,
shmem_initxattrs, NULL);
if (error && error != -EOPNOTSUPP)
goto out_iput;
@@ -3259,14 +3253,11 @@ shmem_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
int error;

inode = shmem_get_inode(idmap, dir->i_sb, dir, mode, 0, VM_NORESERVE);
-
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
goto err_out;
}
-
- error = security_inode_init_security(inode, dir,
- NULL,
+ error = security_inode_init_security(inode, dir, NULL,
shmem_initxattrs, NULL);
if (error && error != -EOPNOTSUPP)
goto out_iput;
@@ -3303,7 +3294,8 @@ static int shmem_create(struct mnt_idmap *idmap, struct inode *dir,
/*
* Link a file..
*/
-static int shmem_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
+static int shmem_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
{
struct inode *inode = d_inode(old_dentry);
int ret = 0;
@@ -3334,7 +3326,7 @@ static int shmem_link(struct dentry *old_dentry, struct inode *dir, struct dentr
inode_inc_iversion(dir);
inc_nlink(inode);
ihold(inode); /* New dentry reference */
- dget(dentry); /* Extra pinning count for the created dentry */
+ dget(dentry); /* Extra pinning count for the created dentry */
d_instantiate(dentry, inode);
out:
return ret;
@@ -3354,7 +3346,7 @@ static int shmem_unlink(struct inode *dir, struct dentry *dentry)
inode_set_ctime_current(inode));
inode_inc_iversion(dir);
drop_nlink(inode);
- dput(dentry); /* Undo the count from "create" - this does all the work */
+ dput(dentry); /* Undo the count from "create" - does all the work */
return 0;
}

@@ -3464,7 +3456,6 @@ static int shmem_symlink(struct mnt_idmap *idmap, struct inode *dir,

inode = shmem_get_inode(idmap, dir->i_sb, dir, S_IFLNK | 0777, 0,
VM_NORESERVE);
-
if (IS_ERR(inode))
return PTR_ERR(inode);

@@ -3518,8 +3509,7 @@ static void shmem_put_link(void *arg)
folio_put(arg);
}

-static const char *shmem_get_link(struct dentry *dentry,
- struct inode *inode,
+static const char *shmem_get_link(struct dentry *dentry, struct inode *inode,
struct delayed_call *done)
{
struct folio *folio = NULL;
@@ -3593,8 +3583,7 @@ static int shmem_fileattr_set(struct mnt_idmap *idmap,
* Callback for security_inode_init_security() for acquiring xattrs.
*/
static int shmem_initxattrs(struct inode *inode,
- const struct xattr *xattr_array,
- void *fs_info)
+ const struct xattr *xattr_array, void *fs_info)
{
struct shmem_inode_info *info = SHMEM_I(inode);
struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
@@ -3778,7 +3767,6 @@ static struct dentry *shmem_find_alias(struct inode *inode)
return alias ?: d_find_any_alias(inode);
}

-
static struct dentry *shmem_fh_to_dentry(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type)
{
@@ -4362,8 +4350,8 @@ static int shmem_fill_super(struct super_block *sb, struct fs_context *fc)
}
#endif /* CONFIG_TMPFS_QUOTA */

- inode = shmem_get_inode(&nop_mnt_idmap, sb, NULL, S_IFDIR | sbinfo->mode, 0,
- VM_NORESERVE);
+ inode = shmem_get_inode(&nop_mnt_idmap, sb, NULL,
+ S_IFDIR | sbinfo->mode, 0, VM_NORESERVE);
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
goto failed;
@@ -4666,11 +4654,9 @@ static ssize_t shmem_enabled_show(struct kobject *kobj,

for (i = 0; i < ARRAY_SIZE(values); i++) {
len += sysfs_emit_at(buf, len,
- shmem_huge == values[i] ? "%s[%s]" : "%s%s",
- i ? " " : "",
- shmem_format_huge(values[i]));
+ shmem_huge == values[i] ? "%s[%s]" : "%s%s",
+ i ? " " : "", shmem_format_huge(values[i]));
}
-
len += sysfs_emit_at(buf, len, "\n");

return len;
@@ -4767,8 +4753,9 @@ EXPORT_SYMBOL_GPL(shmem_truncate_range);
#define shmem_acct_size(flags, size) 0
#define shmem_unacct_size(flags, size) do {} while (0)

-static inline struct inode *shmem_get_inode(struct mnt_idmap *idmap, struct super_block *sb, struct inode *dir,
- umode_t mode, dev_t dev, unsigned long flags)
+static inline struct inode *shmem_get_inode(struct mnt_idmap *idmap,
+ struct super_block *sb, struct inode *dir,
+ umode_t mode, dev_t dev, unsigned long flags)
{
struct inode *inode = ramfs_get_inode(sb, dir, mode, dev);
return inode ? inode : ERR_PTR(-ENOSPC);
@@ -4778,8 +4765,8 @@ static inline struct inode *shmem_get_inode(struct mnt_idmap *idmap, struct supe

/* common code */

-static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, loff_t size,
- unsigned long flags, unsigned int i_flags)
+static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name,
+ loff_t size, unsigned long flags, unsigned int i_flags)
{
struct inode *inode;
struct file *res;
@@ -4798,7 +4785,6 @@ static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, l

inode = shmem_get_inode(&nop_mnt_idmap, mnt->mnt_sb, NULL,
S_IFREG | S_IRWXUGO, 0, flags);
-
if (IS_ERR(inode)) {
shmem_unacct_size(flags, size);
return ERR_CAST(inode);
--
2.35.3