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sysv: switch to put_and_unmap_page()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2023-03-07 01:53:52 -05:00
parent 8ad77c5767
commit ede3ef5c1e
3 changed files with 15 additions and 22 deletions
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28
fs/sysv/dir.c
View File

@ -28,12 +28,6 @@ const struct file_operations sysv_dir_operations = {
.fsync = generic_file_fsync,
};
inline void dir_put_page(struct page *page, void *page_addr)
{
kunmap_local(page_addr);
put_page(page);
}
static void dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
{
struct address_space *mapping = page->mapping;
@ -58,7 +52,7 @@ static int sysv_handle_dirsync(struct inode *dir)
}
/*
* Calls to dir_get_page()/dir_put_page() must be nested according to the
* Calls to dir_get_page()/put_and_unmap_page() must be nested according to the
* rules documented in mm/highmem.rst.
*
* NOTE: sysv_find_entry() and sysv_dotdot() act as calls to dir_get_page()
@ -109,11 +103,11 @@ static int sysv_readdir(struct file *file, struct dir_context *ctx)
if (!dir_emit(ctx, name, strnlen(name,SYSV_NAMELEN),
fs16_to_cpu(SYSV_SB(sb), de->inode),
DT_UNKNOWN)) {
dir_put_page(page, kaddr);
put_and_unmap_page(page, kaddr);
return 0;
}
}
dir_put_page(page, kaddr);
put_and_unmap_page(page, kaddr);
}
return 0;
}
@ -137,7 +131,7 @@ static inline int namecompare(int len, int maxlen,
* itself (as a parameter - res_dir). It does NOT read the inode of the
* entry - you'll have to do that yourself if you want to.
*
* On Success dir_put_page() should be called on *res_page.
* On Success put_and_unmap_page() should be called on *res_page.
*
* sysv_find_entry() acts as a call to dir_get_page() and must be treated
* accordingly for nesting purposes.
@ -172,7 +166,7 @@ struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct page **res_
name, de->name))
goto found;
}
dir_put_page(page, kaddr);
put_and_unmap_page(page, kaddr);
}
if (++n >= npages)
@ -215,7 +209,7 @@ int sysv_add_link(struct dentry *dentry, struct inode *inode)
goto out_page;
de++;
}
dir_put_page(page, kaddr);
put_and_unmap_page(page, kaddr);
}
BUG();
return -EINVAL;
@ -234,7 +228,7 @@ got_it:
mark_inode_dirty(dir);
err = sysv_handle_dirsync(dir);
out_page:
dir_put_page(page, kaddr);
put_and_unmap_page(page, kaddr);
return err;
out_unlock:
unlock_page(page);
@ -327,12 +321,12 @@ int sysv_empty_dir(struct inode * inode)
if (de->name[1] != '.' || de->name[2])
goto not_empty;
}
dir_put_page(page, kaddr);
put_and_unmap_page(page, kaddr);
}
return 1;
not_empty:
dir_put_page(page, kaddr);
put_and_unmap_page(page, kaddr);
return 0;
}
@ -358,7 +352,7 @@ int sysv_set_link(struct sysv_dir_entry *de, struct page *page,
}
/*
* Calls to dir_get_page()/dir_put_page() must be nested according to the
* Calls to dir_get_page()/put_and_unmap_page() must be nested according to the
* rules documented in mm/highmem.rst.
*
* sysv_dotdot() acts as a call to dir_get_page() and must be treated
@ -382,7 +376,7 @@ ino_t sysv_inode_by_name(struct dentry *dentry)
if (de) {
res = fs16_to_cpu(SYSV_SB(dentry->d_sb), de->inode);
dir_put_page(page, de);
put_and_unmap_page(page, de);
}
return res;
}

8
fs/sysv/namei.c
View File

@ -164,7 +164,7 @@ static int sysv_unlink(struct inode * dir, struct dentry * dentry)
inode->i_ctime = dir->i_ctime;
inode_dec_link_count(inode);
}
dir_put_page(page, de);
put_and_unmap_page(page, de);
return err;
}
@ -227,7 +227,7 @@ static int sysv_rename(struct mnt_idmap *idmap, struct inode *old_dir,
if (!new_de)
goto out_dir;
err = sysv_set_link(new_de, new_page, old_inode);
dir_put_page(new_page, new_de);
put_and_unmap_page(new_page, new_de);
if (err)
goto out_dir;
new_inode->i_ctime = current_time(new_inode);
@ -256,9 +256,9 @@ static int sysv_rename(struct mnt_idmap *idmap, struct inode *old_dir,
out_dir:
if (dir_de)
dir_put_page(dir_page, dir_de);
put_and_unmap_page(dir_page, dir_de);
out_old:
dir_put_page(old_page, old_de);
put_and_unmap_page(old_page, old_de);
out:
return err;
}

1
fs/sysv/sysv.h
View File

@ -148,7 +148,6 @@ extern void sysv_destroy_icache(void);
/* dir.c */
extern void dir_put_page(struct page *page, void *vaddr);
extern struct sysv_dir_entry *sysv_find_entry(struct dentry *, struct page **);
extern int sysv_add_link(struct dentry *, struct inode *);
extern int sysv_delete_entry(struct sysv_dir_entry *, struct page *);