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authorDavid S. Miller <davem@davemloft.net>2011-12-02 13:49:21 -0500
committerDavid S. Miller <davem@davemloft.net>2011-12-02 13:49:21 -0500
commitb3613118eb30a589d971e4eccbbb2a1314f5dfd4 (patch)
tree868c1ee59e1b5c19a4f2e43716400d0001a994e5 /arch/arm/mm/mmap.c
parent7505afe28c16a8d386624930a018d0052c75d687 (diff)
parent5983fe2b29df5885880d7fa3b91aca306c7564ef (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/arm/mm/mmap.c')
-rw-r--r--arch/arm/mm/mmap.c23
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 @@
9#include <linux/io.h> 9#include <linux/io.h>
10#include <linux/personality.h> 10#include <linux/personality.h>
11#include <linux/random.h> 11#include <linux/random.h>
12#include <asm/cputype.h> 12#include <asm/cachetype.h>
13#include <asm/system.h>
14 13
15#define COLOUR_ALIGN(addr,pgoff) \ 14#define COLOUR_ALIGN(addr,pgoff) \
16 ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \ 15 ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \
@@ -32,25 +31,15 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
32 struct mm_struct *mm = current->mm; 31 struct mm_struct *mm = current->mm;
33 struct vm_area_struct *vma; 32 struct vm_area_struct *vma;
34 unsigned long start_addr; 33 unsigned long start_addr;
35#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) 34 int do_align = 0;
36 unsigned int cache_type; 35 int aliasing = cache_is_vipt_aliasing();
37 int do_align = 0, aliasing = 0;
38 36
39 /* 37 /*
40 * We only need to do colour alignment if either the I or D 38 * We only need to do colour alignment if either the I or D
41 * caches alias. This is indicated by bits 9 and 21 of the 39 * caches alias.
42 * cache type register.
43 */ 40 */
44 cache_type = read_cpuid_cachetype(); 41 if (aliasing)
45 if (cache_type != read_cpuid_id()) { 42 do_align = filp || (flags & MAP_SHARED);
46 aliasing = (cache_type | cache_type >> 12) & (1 << 11);
47 if (aliasing)
48 do_align = filp || flags & MAP_SHARED;
49 }
50#else
51#define do_align 0
52#define aliasing 0
53#endif
54 43
55 /* 44 /*
56 * We enforce the MAP_FIXED case. 45 * We enforce the MAP_FIXED case.