NFS: Another cleanup of the read/write request coalescing code

[firefly-linux-kernel-4.4.55.git] / include / linux / nfs_page.h

diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 2e555d49c9b732fa4379b8b1c17a98cb430ce857..91c7b18c47d8daad732b62e999f09b0fe65b82f4 100644 (file)
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -31,7 +31,6 @@
 #define PG_NEED_COMMIT         1
 #define PG_NEED_RESCHED                2
 #define PG_NEED_FLUSH          3
-#define PG_FLUSHING            4
 
 struct nfs_inode;
 struct nfs_page {
@@ -49,9 +48,20 @@ struct nfs_page {
        struct nfs_writeverf    wb_verf;        /* Commit cookie */
 };
 
+struct nfs_pageio_descriptor {
+       struct list_head        pg_list;
+       unsigned long           pg_bytes_written;
+       size_t                  pg_count;
+       size_t                  pg_bsize;
+       unsigned int            pg_base;
+
+       struct inode            *pg_inode;
+       int                     (*pg_doio)(struct inode *, struct list_head *, size_t, int);
+       int                     pg_ioflags;
+       int                     pg_error;
+};
+
 #define NFS_WBACK_BUSY(req)    (test_bit(PG_BUSY,&(req)->wb_flags))
-#define NFS_NEED_COMMIT(req)   (test_bit(PG_NEED_COMMIT,&(req)->wb_flags))
-#define NFS_NEED_RESCHED(req)  (test_bit(PG_NEED_RESCHED,&(req)->wb_flags))
 
 extern struct nfs_page *nfs_create_request(struct nfs_open_context *ctx,
                                            struct inode *inode,
@@ -67,8 +77,14 @@ extern       long nfs_scan_dirty(struct address_space *mapping,
                                struct list_head *dst);
 extern int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head, struct list_head *dst,
                          unsigned long idx_start, unsigned int npages);
-extern int nfs_coalesce_requests(struct list_head *, struct list_head *,
-                                 unsigned int);
+extern void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
+                            struct inode *inode,
+                            int (*doio)(struct inode *, struct list_head *, size_t, int),
+                            size_t bsize,
+                            int how);
+extern void nfs_pageio_add_list(struct nfs_pageio_descriptor *,
+                                struct list_head *);
+extern void nfs_pageio_complete(struct nfs_pageio_descriptor *desc);
 extern  int nfs_wait_on_request(struct nfs_page *);
 extern void nfs_unlock_request(struct nfs_page *req);
 extern  int nfs_set_page_writeback_locked(struct nfs_page *req);
@@ -122,34 +138,6 @@ nfs_list_remove_request(struct nfs_page *req)
        req->wb_list_head = NULL;
 }
 
-static inline int
-nfs_defer_commit(struct nfs_page *req)
-{
-       return !test_and_set_bit(PG_NEED_COMMIT, &req->wb_flags);
-}
-
-static inline void
-nfs_clear_commit(struct nfs_page *req)
-{
-       smp_mb__before_clear_bit();
-       clear_bit(PG_NEED_COMMIT, &req->wb_flags);
-       smp_mb__after_clear_bit();
-}
-
-static inline int
-nfs_defer_reschedule(struct nfs_page *req)
-{
-       return !test_and_set_bit(PG_NEED_RESCHED, &req->wb_flags);
-}
-
-static inline void
-nfs_clear_reschedule(struct nfs_page *req)
-{
-       smp_mb__before_clear_bit();
-       clear_bit(PG_NEED_RESCHED, &req->wb_flags);
-       smp_mb__after_clear_bit();
-}
-
 static inline struct nfs_page *
 nfs_list_entry(struct list_head *head)
 {