From patchwork Tue Nov  6 22:38:35 2012
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Subject: [11/16] mm: use vm_unmapped_area() on arm architecture
Date: Tue, 06 Nov 2012 12:38:35 -0000
From: Andrew Morton <akpm@linux-foundation.org>
X-Patchwork-Id: 197570
Message-Id: <20121106143835.3e321da4.akpm@linux-foundation.org>
To: Michel Lespinasse <walken@google.com>
Cc: Rik van Riel <riel@redhat.com>, Hugh Dickins <hughd@google.com>,
 linux-kernel@vger.kernel.org, Russell King <linux@arm.linux.org.uk>,
 Ralf Baechle <ralf@linux-mips.org>, Paul Mundt <lethal@linux-sh.org>,
 "David S. Miller" <davem@davemloft.net>,
 Chris Metcalf <cmetcalf@tilera.com>, x86@kernel.org,
 William Irwin <wli@holomorphy.com>, linux-mm@kvack.org,
 linux-arm-kernel@lists.infradead.org, linux-mips@linux-mips.org,
 linux-sh@vger.kernel.org, sparclinux@vger.kernel.org

On Mon,  5 Nov 2012 14:47:08 -0800
Michel Lespinasse <walken@google.com> wrote:

> Update the arm arch_get_unmapped_area[_topdown] functions to make
> use of vm_unmapped_area() instead of implementing a brute force search.

Again,


--- a/arch/arm/mm/mmap.c~mm-use-vm_unmapped_area-on-arm-architecture-fix
+++ a/arch/arm/mm/mmap.c
@@ -11,18 +11,6 @@
 #include <linux/random.h>
 #include <asm/cachetype.h>
 
-static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr,
-					      unsigned long pgoff)
-{
-	unsigned long base = addr & ~(SHMLBA-1);
-	unsigned long off = (pgoff << PAGE_SHIFT) & (SHMLBA-1);
-
-	if (base + off <= addr)
-		return base + off;
-
-	return base - off;
-}
-
 #define COLOUR_ALIGN(addr,pgoff)		\
 	((((addr)+SHMLBA-1)&~(SHMLBA-1)) +	\
 	 (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))