sysv: switch to put_and_unmap_page()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Author: Al Viro

fs/sysv/dir.c

@@ -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 @@ int sysv_add_link(struct dentry *dentry, struct inode *inode)
 	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;
 }

fs/sysv/namei.c

@@ -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;
 }

fs/sysv/sysv.h

@@ -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 *);