NFS: remove NFS_PAGE_TAG_LOCKED
Fred Isaman [Thu, 8 Mar 2012 22:29:34 +0000 (17:29 -0500)]
The last real use of this tag was removed by
commit 7f2f12d963 NFS: Simplify nfs_wb_page()

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/pagelist.c
fs/nfs/write.c
include/linux/nfs_page.h

index 77a184e..fc5b54b 100644 (file)
@@ -107,36 +107,6 @@ void nfs_unlock_request(struct nfs_page *req)
        nfs_release_request(req);
 }
 
-/**
- * nfs_set_page_tag_locked - Tag a request as locked
- * @req:
- */
-int nfs_set_page_tag_locked(struct nfs_page *req)
-{
-       if (!nfs_lock_request_dontget(req))
-               return 0;
-       if (test_bit(PG_MAPPED, &req->wb_flags))
-               radix_tree_tag_set(&NFS_I(req->wb_context->dentry->d_inode)->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
-       return 1;
-}
-
-/**
- * nfs_clear_page_tag_locked - Clear request tag and wake up sleepers
- */
-void nfs_clear_page_tag_locked(struct nfs_page *req)
-{
-       if (test_bit(PG_MAPPED, &req->wb_flags)) {
-               struct inode *inode = req->wb_context->dentry->d_inode;
-               struct nfs_inode *nfsi = NFS_I(inode);
-
-               spin_lock(&inode->i_lock);
-               radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
-               nfs_unlock_request(req);
-               spin_unlock(&inode->i_lock);
-       } else
-               nfs_unlock_request(req);
-}
-
 /*
  * nfs_clear_request - Free up all resources allocated to the request
  * @req:
@@ -469,7 +439,7 @@ int nfs_scan_list(struct nfs_inode *nfsi,
                        if (req->wb_index > idx_end)
                                goto out;
                        idx_start = req->wb_index + 1;
-                       if (nfs_set_page_tag_locked(req)) {
+                       if (nfs_lock_request_dontget(req)) {
                                kref_get(&req->wb_kref);
                                radix_tree_tag_clear(&nfsi->nfs_page_tree,
                                                req->wb_index, tag);
index 0b1831d..fd8a4f0 100644 (file)
@@ -236,10 +236,10 @@ static struct nfs_page *nfs_find_and_lock_request(struct page *page, bool nonblo
                req = nfs_page_find_request_locked(page);
                if (req == NULL)
                        break;
-               if (nfs_set_page_tag_locked(req))
+               if (nfs_lock_request_dontget(req))
                        break;
                /* Note: If we hold the page lock, as is the case in nfs_writepage,
-                *       then the call to nfs_set_page_tag_locked() will always
+                *       then the call to nfs_lock_request_dontget() will always
                 *       succeed provided that someone hasn't already marked the
                 *       request as dirty (in which case we don't care).
                 */
@@ -397,8 +397,6 @@ static int nfs_inode_add_request(struct inode *inode, struct nfs_page *req)
        set_page_private(req->wb_page, (unsigned long)req);
        nfsi->npages++;
        kref_get(&req->wb_kref);
-       radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index,
-                               NFS_PAGE_TAG_LOCKED);
        spin_unlock(&inode->i_lock);
        radix_tree_preload_end();
 out:
@@ -604,7 +602,7 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode,
                    || end < req->wb_offset)
                        goto out_flushme;
 
-               if (nfs_set_page_tag_locked(req))
+               if (nfs_lock_request_dontget(req))
                        break;
 
                /* The request is locked, so wait and then retry */
@@ -684,7 +682,7 @@ static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page,
        nfs_grow_file(page, offset, count);
        nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes);
        nfs_mark_request_dirty(req);
-       nfs_clear_page_tag_locked(req);
+       nfs_unlock_request(req);
        return 0;
 }
 
@@ -777,7 +775,7 @@ static void nfs_writepage_release(struct nfs_page *req,
 
        if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req, data))
                nfs_inode_remove_request(req);
-       nfs_clear_page_tag_locked(req);
+       nfs_unlock_request(req);
        nfs_end_page_writeback(page);
 }
 
@@ -925,7 +923,7 @@ static void nfs_redirty_request(struct nfs_page *req)
        struct page *page = req->wb_page;
 
        nfs_mark_request_dirty(req);
-       nfs_clear_page_tag_locked(req);
+       nfs_unlock_request(req);
        nfs_end_page_writeback(page);
 }
 
@@ -1199,7 +1197,7 @@ static void nfs_writeback_release_full(void *calldata)
 remove_request:
                nfs_inode_remove_request(req);
        next:
-               nfs_clear_page_tag_locked(req);
+               nfs_unlock_request(req);
                nfs_end_page_writeback(page);
        }
        nfs_writedata_release(calldata);
@@ -1411,7 +1409,7 @@ void nfs_retry_commit(struct list_head *page_list,
                dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
                dec_bdi_stat(req->wb_page->mapping->backing_dev_info,
                             BDI_RECLAIMABLE);
-               nfs_clear_page_tag_locked(req);
+               nfs_unlock_request(req);
        }
 }
 EXPORT_SYMBOL_GPL(nfs_retry_commit);
@@ -1486,7 +1484,7 @@ void nfs_commit_release_pages(struct nfs_write_data *data)
                dprintk(" mismatch\n");
                nfs_mark_request_dirty(req);
        next:
-               nfs_clear_page_tag_locked(req);
+               nfs_unlock_request(req);
        }
 }
 EXPORT_SYMBOL_GPL(nfs_commit_release_pages);
index ab465fe..65b563f 100644 (file)
@@ -21,7 +21,6 @@
 /*
  * Valid flags for the radix tree
  */
-#define NFS_PAGE_TAG_LOCKED    0
 #define NFS_PAGE_TAG_COMMIT    1
 
 /*
@@ -106,8 +105,6 @@ extern bool nfs_generic_pg_test(struct nfs_pageio_descriptor *desc,
                                struct nfs_page *req);
 extern  int nfs_wait_on_request(struct nfs_page *);
 extern void nfs_unlock_request(struct nfs_page *req);
-extern int nfs_set_page_tag_locked(struct nfs_page *req);
-extern  void nfs_clear_page_tag_locked(struct nfs_page *req);
 
 /*
  * Lock the page of an asynchronous request without getting a new reference