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

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>

diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index 74be05f..44b628e 100644 (file)
--- a/arch/arm/mm/mmap.c
+++ b/arch/arm/mm/mmap.c
@@ -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.