[PATCH 2/4] arm: let set_memory_xx(addr, 0) succeed.

From: Mika Penttil? <redacted>

This makes set_memory_xx() consistent with x86.

Signed-off-by: Mika Penttil? mika.penttila at nextfour.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;