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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-12-05 23:20:17 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-12-05 23:20:17 +0000
commit742eaa6a6e356a16788ce6530271de89bc4f8fb5 (patch)
tree12fc040daab06ac796c61c1d92bfad9bb054d1c1 /arch/arm/mm
parentba8bb18a03f8c7508565c385576a5431a4ad804a (diff)
parentae72fd588a2b302222769b44775912b83f0785eb (diff)
Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
Conflicts: arch/arm/common/gic.c arch/arm/plat-omap/include/plat/common.h
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/cache-l2x0.c2
-rw-r--r--arch/arm/mm/dma-mapping.c11
-rw-r--r--arch/arm/mm/mmap.c23
3 files changed, 17 insertions, 19 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index 8ac9e9f84790..b1e192ba8c24 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -61,7 +61,7 @@ static inline void cache_sync(void)
{
void __iomem *base = l2x0_base;
-#ifdef CONFIG_ARM_ERRATA_753970
+#ifdef CONFIG_PL310_ERRATA_753970
/* write to an unmmapped register */
writel_relaxed(0, base + L2X0_DUMMY_REG);
#else
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index e4e7f6cba1ab..1aa664a1999f 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -168,7 +168,7 @@ static int __init consistent_init(void)
pte_t *pte;
int i = 0;
unsigned long base = consistent_base;
- unsigned long num_ptes = (CONSISTENT_END - base) >> PGDIR_SHIFT;
+ unsigned long num_ptes = (CONSISTENT_END - base) >> PMD_SHIFT;
consistent_pte = kmalloc(num_ptes * sizeof(pte_t), GFP_KERNEL);
if (!consistent_pte) {
@@ -332,6 +332,15 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
struct page *page;
void *addr;
+ /*
+ * Following is a work-around (a.k.a. hack) to prevent pages
+ * with __GFP_COMP being passed to split_page() which cannot
+ * handle them. The real problem is that this flag probably
+ * should be 0 on ARM as it is not supported on this
+ * platform; see CONFIG_HUGETLBFS.
+ */
+ gfp &= ~(__GFP_COMP);
+
*handle = ~0;
size = PAGE_ALIGN(size);
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.