1 files changed, 58 insertions, 89 deletions

diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
index e049d00c087a..e3bfde00c7d2 100644
--- a/drivers/staging/erofs/internal.h
+++ b/drivers/staging/erofs/internal.h
@@ -252,47 +252,20 @@ static inline int erofs_wait_on_workgroup_freezed(struct erofs_workgroup *grp)
 }
 #endif
 
-static inline bool erofs_workgroup_get(struct erofs_workgroup *grp, int *ocnt)
-{
-	int o;
-
-repeat:
-	o = erofs_wait_on_workgroup_freezed(grp);
-
-	if (unlikely(o <= 0))
-		return -1;
-
-	if (unlikely(atomic_cmpxchg(&grp->refcount, o, o + 1) != o))
-		goto repeat;
-
-	*ocnt = o;
-	return 0;
-}
-
-#define __erofs_workgroup_get(grp)	atomic_inc(&(grp)->refcount)
-#define __erofs_workgroup_put(grp)	atomic_dec(&(grp)->refcount)
-
-extern int erofs_workgroup_put(struct erofs_workgroup *grp);
-
-extern struct erofs_workgroup *erofs_find_workgroup(
-	struct super_block *sb, pgoff_t index, bool *tag);
-
-extern int erofs_register_workgroup(struct super_block *sb,
-	struct erofs_workgroup *grp, bool tag);
-
-extern unsigned long erofs_shrink_workstation(struct erofs_sb_info *sbi,
-	unsigned long nr_shrink, bool cleanup);
-
-static inline void erofs_workstation_cleanup_all(struct super_block *sb)
-{
-	erofs_shrink_workstation(EROFS_SB(sb), ~0UL, true);
-}
+int erofs_workgroup_put(struct erofs_workgroup *grp);
+struct erofs_workgroup *erofs_find_workgroup(struct super_block *sb,
+					     pgoff_t index, bool *tag);
+int erofs_register_workgroup(struct super_block *sb,
+			     struct erofs_workgroup *grp, bool tag);
+unsigned long erofs_shrink_workstation(struct erofs_sb_info *sbi,
+				       unsigned long nr_shrink, bool cleanup);
+void erofs_workgroup_free_rcu(struct erofs_workgroup *grp);
 
 #ifdef EROFS_FS_HAS_MANAGED_CACHE
-extern int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
-	struct erofs_workgroup *egrp);
-extern int erofs_try_to_free_cached_page(struct address_space *mapping,
-	struct page *page);
+int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
+				       struct erofs_workgroup *egrp);
+int erofs_try_to_free_cached_page(struct address_space *mapping,
+				  struct page *page);
 
 #define MNGD_MAPPING(sbi)	((sbi)->managed_cache->i_mapping)
 #else
@@ -354,12 +327,17 @@ static inline erofs_off_t iloc(struct erofs_sb_info *sbi, erofs_nid_t nid)
 	return blknr_to_addr(sbi->meta_blkaddr) + (nid << sbi->islotbits);
 }
 
-#define inode_set_inited_xattr(inode)   (EROFS_V(inode)->flags |= 1)
-#define inode_has_inited_xattr(inode)   (EROFS_V(inode)->flags & 1)
+/* atomic flag definitions */
+#define EROFS_V_EA_INITED_BIT	0
+
+/* bitlock definitions (arranged in reverse order) */
+#define EROFS_V_BL_XATTR_BIT	(BITS_PER_LONG - 1)
 
 struct erofs_vnode {
 	erofs_nid_t nid;
-	unsigned int flags;
+
+	/* atomic flags (including bitlocks) */
+	unsigned long flags;
 
 	unsigned char data_mapping_mode;
 	/* inline size in bytes */
@@ -412,8 +390,6 @@ static inline bool is_inode_layout_inline(struct inode *inode)
 }
 
 extern const struct super_operations erofs_sops;
-extern const struct inode_operations erofs_dir_iops;
-extern const struct file_operations erofs_dir_fops;
 
 extern const struct address_space_operations erofs_raw_access_aops;
 #ifdef CONFIG_EROFS_FS_ZIP
@@ -461,11 +437,26 @@ struct erofs_map_blocks {
 	u64 m_plen, m_llen;
 
 	unsigned int m_flags;
+
+	struct page *mpage;
 };
 
 /* Flags used by erofs_map_blocks() */
 #define EROFS_GET_BLOCKS_RAW    0x0001
 
+#ifdef CONFIG_EROFS_FS_ZIP
+int z_erofs_map_blocks_iter(struct inode *inode,
+			    struct erofs_map_blocks *map,
+			    int flags);
+#else
+static inline int z_erofs_map_blocks_iter(struct inode *inode,
+					  struct erofs_map_blocks *map,
+					  int flags)
+{
+	return -ENOTSUPP;
+}
+#endif
+
 /* data.c */
 static inline struct bio *
 erofs_grab_bio(struct super_block *sb,
@@ -506,8 +497,8 @@ static inline void __submit_bio(struct bio *bio, unsigned op, unsigned op_flags)
 #define EROFS_IO_MAX_RETRIES_NOFAIL	CONFIG_EROFS_FS_IO_MAX_RETRIES
 #endif
 
-extern struct page *__erofs_get_meta_page(struct super_block *sb,
-	erofs_blk_t blkaddr, bool prio, bool nofail);
+struct page *__erofs_get_meta_page(struct super_block *sb, erofs_blk_t blkaddr,
+				   bool prio, bool nofail);
 
 static inline struct page *erofs_get_meta_page(struct super_block *sb,
 	erofs_blk_t blkaddr, bool prio)
@@ -521,15 +512,7 @@ static inline struct page *erofs_get_meta_page_nofail(struct super_block *sb,
 	return __erofs_get_meta_page(sb, blkaddr, prio, true);
 }
 
-extern int erofs_map_blocks(struct inode *, struct erofs_map_blocks *, int);
-extern int erofs_map_blocks_iter(struct inode *, struct erofs_map_blocks *,
-	struct page **, int);
-
-struct erofs_map_blocks_iter {
-	struct erofs_map_blocks map;
-	struct page *mpage;
-};
-
+int erofs_map_blocks(struct inode *, struct erofs_map_blocks *, int);
 
 static inline struct page *
 erofs_get_inline_page(struct inode *inode,
@@ -549,41 +532,31 @@ static inline unsigned long erofs_inode_hash(erofs_nid_t nid)
 #endif
 }
 
-extern struct inode *erofs_iget(struct super_block *sb,
-	erofs_nid_t nid, bool dir);
-
-/* dir.c */
-int erofs_namei(struct inode *dir, struct qstr *name,
-	erofs_nid_t *nid, unsigned *d_type);
-
-#ifdef CONFIG_EROFS_FS_XATTR
-/* xattr.c */
-extern const struct xattr_handler *erofs_xattr_handlers[];
-
-/* symlink and special inode */
-extern const struct inode_operations erofs_symlink_xattr_iops;
-extern const struct inode_operations erofs_fast_symlink_xattr_iops;
-extern const struct inode_operations erofs_special_inode_operations;
-#endif
+extern const struct inode_operations erofs_generic_iops;
+extern const struct inode_operations erofs_symlink_iops;
+extern const struct inode_operations erofs_fast_symlink_iops;
 
 static inline void set_inode_fast_symlink(struct inode *inode)
 {
-#ifdef CONFIG_EROFS_FS_XATTR
-	inode->i_op = &erofs_fast_symlink_xattr_iops;
-#else
-	inode->i_op = &simple_symlink_inode_operations;
-#endif
+	inode->i_op = &erofs_fast_symlink_iops;
 }
 
 static inline bool is_inode_fast_symlink(struct inode *inode)
 {
-#ifdef CONFIG_EROFS_FS_XATTR
-	return inode->i_op == &erofs_fast_symlink_xattr_iops;
-#else
-	return inode->i_op == &simple_symlink_inode_operations;
-#endif
+	return inode->i_op == &erofs_fast_symlink_iops;
 }
 
+struct inode *erofs_iget(struct super_block *sb, erofs_nid_t nid, bool dir);
+
+/* namei.c */
+extern const struct inode_operations erofs_dir_iops;
+
+int erofs_namei(struct inode *dir, struct qstr *name,
+		erofs_nid_t *nid, unsigned int *d_type);
+
+/* dir.c */
+extern const struct file_operations erofs_dir_fops;
+
 static inline void *erofs_vmap(struct page **pages, unsigned int count)
 {
 #ifdef CONFIG_EROFS_FS_USE_VM_MAP_RAM
@@ -612,15 +585,11 @@ static inline void erofs_vunmap(const void *mem, unsigned int count)
 }
 
 /* utils.c */
-extern struct page *erofs_allocpage(struct list_head *pool, gfp_t gfp);
-
-extern void erofs_register_super(struct super_block *sb);
-extern void erofs_unregister_super(struct super_block *sb);
+extern struct shrinker erofs_shrinker_info;
 
-extern unsigned long erofs_shrink_count(struct shrinker *shrink,
-	struct shrink_control *sc);
-extern unsigned long erofs_shrink_scan(struct shrinker *shrink,
-	struct shrink_control *sc);
+struct page *erofs_allocpage(struct list_head *pool, gfp_t gfp);
+void erofs_register_super(struct super_block *sb);
+void erofs_unregister_super(struct super_block *sb);
 
 #ifndef lru_to_page
 #define lru_to_page(head) (list_entry((head)->prev, struct page, lru))