From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752420AbdF3AmA (ORCPT ); Thu, 29 Jun 2017 20:42:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:53076 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751710AbdF3AkY (ORCPT ); Thu, 29 Jun 2017 20:40:24 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CED2422BD0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=rostedt@goodmis.org Message-Id: <20170630004022.815397820@goodmis.org> User-Agent: quilt/0.63-1 Date: Thu, 29 Jun 2017 20:38:39 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton Subject: [for-next][PATCH 08/12] ftrace: Remove unused function ftrace_arch_read_dyn_info() References: <20170630003831.946074263@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=0008-ftrace-Remove-unused-function-ftrace_arch_read_dyn_i.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Steven Rostedt (VMware)" ftrace_arch_read_dyn_info() was used so that archs could add its own debug information into the dyn_ftrace_total_info in the tracefs file system. That file is for debugging usage of dynamic ftrace. No arch uses that function anymore, so just get rid of it. This also allows for tracing_read_dyn_info() to be cleaned up a bit. Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace.c | 21 +++------------------ 1 file changed, 3 insertions(+), 18 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 19ac2088d10a..14318ce92b13 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -6737,33 +6737,18 @@ static const struct file_operations tracing_stats_fops = { #ifdef CONFIG_DYNAMIC_FTRACE -int __weak ftrace_arch_read_dyn_info(char *buf, int size) -{ - return 0; -} - static ssize_t tracing_read_dyn_info(struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos) { - static char ftrace_dyn_info_buffer[1024]; - static DEFINE_MUTEX(dyn_info_mutex); unsigned long *p = filp->private_data; - char *buf = ftrace_dyn_info_buffer; - int size = ARRAY_SIZE(ftrace_dyn_info_buffer); + char buf[64]; /* Not too big for a shallow stack */ int r; - mutex_lock(&dyn_info_mutex); - r = sprintf(buf, "%ld ", *p); - - r += ftrace_arch_read_dyn_info(buf+r, (size-1)-r); + r = scnprintf(buf, 63, "%ld", *p); buf[r++] = '\n'; - r = simple_read_from_buffer(ubuf, cnt, ppos, buf, r); - - mutex_unlock(&dyn_info_mutex); - - return r; + return simple_read_from_buffer(ubuf, cnt, ppos, buf, r); } static const struct file_operations tracing_dyn_info_fops = { -- 2.10.2