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| author |   Rob Herring <rob.herring@calxeda.com> | 2011-11-22 04:01:06 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2011-11-26 21:58:52 +0000 |
| commit | 41dfaa934c5d866d626de9bea785e6168524a47e (patch) | |
| tree | a4e7541f35763b1767b380d1b4cc526e76ed0d01 /arch | |
| parent | Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into fixes (diff) | |
| download | linux-dev-41dfaa934c5d866d626de9bea785e6168524a47e.tar.xz linux-dev-41dfaa934c5d866d626de9bea785e6168524a47e.zip | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mm/mmap.c | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c index 74be05f3e03a..44b628e4d6ea 100644 --- 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. |