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ARM: 7168/1: use cache type functions for arch_get_unmapped_area

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There are already cache type decoding functions, so use those instead
of custom decode code which only works for ARMv6.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Rob Herring 2011-11-22 04:01:06 +01:00 committed by Russell King
parent 7334c6755e
commit 41dfaa934c
1 changed files with 6 additions and 17 deletions
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23
arch/arm/mm/mmap.c
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@ -9,8 +9,7 @@
#include <linux/io.h>
#include <linux/personality.h>
#include <linux/random.h>
#include <asm/cputype.h>
#include <asm/system.h>
#include <asm/cachetype.h>
#define COLOUR_ALIGN(addr,pgoff) \
((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
@ -32,25 +31,15 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
unsigned long start_addr;
#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K)
unsigned int cache_type;
int do_align = 0, aliasing = 0;
int do_align = 0;
int aliasing = cache_is_vipt_aliasing();
/*
* We only need to do colour alignment if either the I or D
* caches alias. This is indicated by bits 9 and 21 of the
* cache type register.
* caches alias.
*/
cache_type = read_cpuid_cachetype();
if (cache_type != read_cpuid_id()) {
aliasing = (cache_type | cache_type >> 12) & (1 << 11);
if (aliasing)
do_align = filp || flags & MAP_SHARED;
}
#else
#define do_align 0
#define aliasing 0
#endif
if (aliasing)
do_align = filp || (flags & MAP_SHARED);
/*
* We enforce the MAP_FIXED case.