linux-kernel - [PATCH 2/4] arm: let set_memory

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Message-ID: <1453561543-14756-3-git-send-email-mika.penttila@nextfour.com>
Date:	Sat, 23 Jan 2016 17:05:41 +0200
From:	<mika.penttila@...tfour.com>
To:	<linux-kernel@...r.kernel.org>
CC:	<linux-mm@...ck.org>, <rientjes@...gle.com>,
	<linux@....linux.org.uk>,
	Mika Penttilä <mika.penttila@...tfour.com>
Subject: [PATCH 2/4] arm: let set_memory_xx(addr, 0) succeed.

From: Mika Penttilä <mika.penttila@...tfour.com>

This makes set_memory_xx() consistent with x86.

Signed-off-by: Mika Penttilä mika.penttila@...tfour.com

---
 arch/arm/mm/pageattr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mm/pageattr.c b/arch/arm/mm/pageattr.c
index be7fe4b..9edf6b0 100644
--- a/arch/arm/mm/pageattr.c
+++ b/arch/arm/mm/pageattr.c
@@ -49,6 +49,9 @@ static int change_memory_common(unsigned long addr, int numpages,
 		WARN_ON_ONCE(1);
 	}
 
+	if (!numpages)
+		return 0;
+
 	if (start < MODULES_VADDR || start >= MODULES_END)
 		return -EINVAL;
 
-- 
1.9.1