linux-kernel - [RFC 2/3] uprobe: drop isdigit() check in create_trace

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Date:   Thu, 25 Aug 2016 18:21:09 +0300
From:   Dmitry Safonov <dsafonov@...tuozzo.com>
To:     <linux-kernel@...r.kernel.org>, <mingo@...hat.com>
CC:     <luto@...capital.net>, <tglx@...utronix.de>, <hpa@...or.com>,
        <x86@...nel.org>, <0x7f454c46@...il.com>, <oleg@...hat.com>,
        <rostedt@...dmis.org>, <viro@...iv.linux.org.uk>,
        Dmitry Safonov <dsafonov@...tuozzo.com>
Subject: [RFC 2/3] uprobe: drop isdigit() check in create_trace_uprobe

It's useless. Before:
  [tracing]# echo 'p:test /a:0x0' >> uprobe_events
  [tracing]# echo 'p:test a:0x0' >> uprobe_events
  -bash: echo: write error: No such file or directory
  [tracing]# echo 'p:test 1:0x0' >> uprobe_events
  -bash: echo: write error: Invalid argument

After:
  [tracing]# echo 'p:test 1:0x0' >> uprobe_events
  -bash: echo: write error: No such file or directory

Signed-off-by: Dmitry Safonov <dsafonov@...tuozzo.com>
---
 kernel/trace/trace_uprobe.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index c53485441c88..a74f2d9ff379 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -427,10 +427,6 @@ static int create_trace_uprobe(int argc, char **argv)
 		pr_info("Probe point is not specified.\n");
 		return -EINVAL;
 	}
-	if (isdigit(argv[1][0])) {
-		pr_info("probe point must be have a filename.\n");
-		return -EINVAL;
-	}
 	arg = strchr(argv[1], ':');
 	if (!arg) {
 		ret = -EINVAL;
-- 
2.9.0