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Commit 902a4c00 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Remove nfs_page_group_clear_bits() 



At this point, we only expect ever to potentially see PG_REMOVE and
PG_TEARDOWN being set on the subrequests.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 5b2b5187

fs/nfs/write.c

+3 −26
Original line number Diff line number Diff line
@@ -347,22 +347,6 @@ static void nfs_end_page_writeback(struct nfs_page *req) 
		clear_bdi_congested(inode_to_bdi(inode), BLK_RW_ASYNC);

}





/* nfs_page_group_clear_bits

 *   @req - an nfs request

 * clears all page group related bits from @req

 */

static void

nfs_page_group_clear_bits(struct nfs_page *req)

{

	clear_bit(PG_TEARDOWN, &req->wb_flags);

	clear_bit(PG_UNLOCKPAGE, &req->wb_flags);

	clear_bit(PG_UPTODATE, &req->wb_flags);

	clear_bit(PG_WB_END, &req->wb_flags);

	clear_bit(PG_REMOVE, &req->wb_flags);

}





/*

 * nfs_unroll_locks_and_wait -  unlock all newly locked reqs and wait on @req

 *
@@ -417,13 +401,12 @@ nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list, 
		/* make sure old group is not used */

		subreq->wb_this_page = subreq;



		clear_bit(PG_REMOVE, &subreq->wb_flags);



		/* Note: races with nfs_page_group_destroy() */

		if (!kref_read(&subreq->wb_kref)) {

			bool freeme = test_bit(PG_TEARDOWN, &subreq->wb_flags);



			nfs_page_group_clear_bits(subreq);

			/* Check if we raced with nfs_page_group_destroy() */

			if (freeme)

			if (test_and_clear_bit(PG_TEARDOWN, &subreq->wb_flags))

				nfs_free_request(subreq);

			continue;

		}
@@ -437,7 +420,6 @@ nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list, 
			spin_unlock(&inode->i_lock);

		}



		nfs_page_group_clear_bits(subreq);

		/* subreq is now totally disconnected from page group or any

		 * write / commit lists. last chance to wake any waiters */

		nfs_unlock_and_release_request(subreq);
@@ -573,11 +555,6 @@ nfs_lock_and_join_requests(struct page *page) 
		spin_unlock(&inode->i_lock);

	}



	/*

	 * prepare head request to be added to new pgio descriptor

	 */

	nfs_page_group_clear_bits(head);



	nfs_page_group_unlock(head);



	nfs_destroy_unlinked_subrequests(destroy_list, head, inode);