linux-kernel - [PATCH 34/38] perf: remove invalid check

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Date:	Mon, 21 Sep 2015 15:34:06 +0200
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Eric Paris <eparis@...hat.com>, linux-sh@...r.kernel.org
Subject: [PATCH 34/38] perf: remove invalid check

Unsigned values cannot be lesser than zero.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
 arch/sh/kernel/ptrace_32.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index c1a6b89..6125ce9 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -419,8 +419,7 @@ long arch_ptrace(struct task_struct *child, long request,
 
 	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
 		ret = -EIO;
-		if ((addr & 3) || addr < 0 ||
-		    addr > sizeof(struct user) - 3)
+		if ((addr & 3) || addr > sizeof(struct user) - 3)
 			break;
 
 		if (addr < sizeof(struct pt_regs))
-- 
1.9.1

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