[PATCH] NFS: cleanup: shrink struct nfs_open_context
Remove the wait queue, and replace the functions that depended on it
with wait_on_bit().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 4f1ba72..80777f9 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -107,7 +107,7 @@
smp_mb__before_clear_bit();
clear_bit(PG_BUSY, &req->wb_flags);
smp_mb__after_clear_bit();
- wake_up_all(&req->wb_context->waitq);
+ wake_up_bit(&req->wb_flags, PG_BUSY);
nfs_release_request(req);
}
@@ -180,6 +180,17 @@
req->wb_list_head = head;
}
+static int nfs_wait_bit_interruptible(void *word)
+{
+ int ret = 0;
+
+ if (signal_pending(current))
+ ret = -ERESTARTSYS;
+ else
+ schedule();
+ return ret;
+}
+
/**
* nfs_wait_on_request - Wait for a request to complete.
* @req: request to wait upon.
@@ -190,12 +201,22 @@
int
nfs_wait_on_request(struct nfs_page *req)
{
- struct inode *inode = req->wb_context->dentry->d_inode;
- struct rpc_clnt *clnt = NFS_CLIENT(inode);
+ struct rpc_clnt *clnt = NFS_CLIENT(req->wb_context->dentry->d_inode);
+ sigset_t oldmask;
+ int ret = 0;
- if (!NFS_WBACK_BUSY(req))
- return 0;
- return nfs_wait_event(clnt, req->wb_context->waitq, !NFS_WBACK_BUSY(req));
+ if (!test_bit(PG_BUSY, &req->wb_flags))
+ goto out;
+ /*
+ * Note: the call to rpc_clnt_sigmask() suffices to ensure that we
+ * are not interrupted if intr flag is not set
+ */
+ rpc_clnt_sigmask(clnt, &oldmask);
+ ret = out_of_line_wait_on_bit(&req->wb_flags, PG_BUSY,
+ nfs_wait_bit_interruptible, TASK_INTERRUPTIBLE);
+ rpc_clnt_sigunmask(clnt, &oldmask);
+out:
+ return ret;
}
/**