From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f194.google.com ([209.85.223.194]:33499 "EHLO mail-io0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754059AbdBGNuj (ORCPT ); Tue, 7 Feb 2017 08:50:39 -0500 Received: by mail-io0-f194.google.com with SMTP id 101so12867944iom.0 for ; Tue, 07 Feb 2017 05:50:39 -0800 (PST) Subject: [PATCH 7/7] sunrpc: use simple_read_from_buffer for reading cache flush To: "J. Bruce Fields" , linux-nfs@vger.kernel.org References: <59432847-8e45-4423-c441-0c67ee645f38@gmail.com> Cc: Trond Myklebust , Kinglong Mee From: Kinglong Mee Message-ID: <02295874-6761-724a-ec8c-cc5159bc0d98@gmail.com> Date: Tue, 7 Feb 2017 21:50:32 +0800 MIME-Version: 1.0 In-Reply-To: <59432847-8e45-4423-c441-0c67ee645f38@gmail.com> Content-Type: text/plain; charset=utf-8 Sender: linux-nfs-owner@vger.kernel.org List-ID: Signed-off-by: Kinglong Mee --- net/sunrpc/cache.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index 9e8561d..2f06f51 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -1427,20 +1427,11 @@ static ssize_t read_flush(struct file *file, char __user *buf, struct cache_detail *cd) { char tbuf[22]; - unsigned long p = *ppos; size_t len; - snprintf(tbuf, sizeof(tbuf), "%lu\n", convert_to_wallclock(cd->flush_time)); - len = strlen(tbuf); - if (p >= len) - return 0; - len -= p; - if (len > count) - len = count; - if (copy_to_user(buf, (void*)(tbuf+p), len)) - return -EFAULT; - *ppos += len; - return len; + len = snprintf(tbuf, sizeof(tbuf), "%lu\n", + convert_to_wallclock(cd->flush_time)); + return simple_read_from_buffer(buf, count, ppos, tbuf, len); } static ssize_t write_flush(struct file *file, const char __user *buf, -- 2.9.3