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Diffstat (limited to 'include/linux/nfs_page.h')
-rw-r--r--include/linux/nfs_page.h25
1 files changed, 11 insertions, 14 deletions
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index bd193af80162..78e60798d10e 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -16,12 +16,13 @@
#include <linux/sunrpc/auth.h>
#include <linux/nfs_xdr.h>
-#include <asm/atomic.h>
+#include <linux/kref.h>
/*
* Valid flags for the radix tree
*/
-#define NFS_PAGE_TAG_WRITEBACK 0
+#define NFS_PAGE_TAG_LOCKED 0
+#define NFS_PAGE_TAG_COMMIT 1
/*
* Valid flags for a dirty buffer
@@ -33,8 +34,7 @@
struct nfs_inode;
struct nfs_page {
- struct list_head wb_list, /* Defines state of page: */
- *wb_list_head; /* read/write/commit */
+ struct list_head wb_list; /* Defines state of page: */
struct page *wb_page; /* page to read in/write out */
struct nfs_open_context *wb_context; /* File state context info */
atomic_t wb_complete; /* i/os we're waiting for */
@@ -42,7 +42,7 @@ struct nfs_page {
unsigned int wb_offset, /* Offset & ~PAGE_CACHE_MASK */
wb_pgbase, /* Start of page data */
wb_bytes; /* Length of request */
- atomic_t wb_count; /* reference count */
+ struct kref wb_kref; /* reference count */
unsigned long wb_flags;
struct nfs_writeverf wb_verf; /* Commit cookie */
};
@@ -71,8 +71,8 @@ extern void nfs_clear_request(struct nfs_page *req);
extern void nfs_release_request(struct nfs_page *req);
-extern int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head, struct list_head *dst,
- pgoff_t idx_start, unsigned int npages);
+extern int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *dst,
+ pgoff_t idx_start, unsigned int npages, int tag);
extern void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
struct inode *inode,
int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int),
@@ -84,12 +84,11 @@ extern void nfs_pageio_complete(struct nfs_pageio_descriptor *desc);
extern void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *, pgoff_t);
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);
-extern void nfs_clear_page_writeback(struct nfs_page *req);
+extern void nfs_clear_page_tag_locked(struct nfs_page *req);
/*
- * Lock the page of an asynchronous request without incrementing the wb_count
+ * Lock the page of an asynchronous request without getting a new reference
*/
static inline int
nfs_lock_request_dontget(struct nfs_page *req)
@@ -98,14 +97,14 @@ nfs_lock_request_dontget(struct nfs_page *req)
}
/*
- * Lock the page of an asynchronous request
+ * Lock the page of an asynchronous request and take a reference
*/
static inline int
nfs_lock_request(struct nfs_page *req)
{
if (test_and_set_bit(PG_BUSY, &req->wb_flags))
return 0;
- atomic_inc(&req->wb_count);
+ kref_get(&req->wb_kref);
return 1;
}
@@ -118,7 +117,6 @@ static inline void
nfs_list_add_request(struct nfs_page *req, struct list_head *head)
{
list_add_tail(&req->wb_list, head);
- req->wb_list_head = head;
}
@@ -132,7 +130,6 @@ nfs_list_remove_request(struct nfs_page *req)
if (list_empty(&req->wb_list))
return;
list_del_init(&req->wb_list);
- req->wb_list_head = NULL;
}
static inline struct nfs_page *