AGP keeps its own copy of the protection_map, upcoming DRM changes
will also require access to this map from modules.
Signed-off-by: Dave Airlie <[email protected]>
---
drivers/char/agp/frontend.c | 8 +-------
include/linux/mm.h | 1 +
mm/mmap.c | 6 ++++++
3 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c
index d9c5a91..1842427 100644
--- a/drivers/char/agp/frontend.c
+++ b/drivers/char/agp/frontend.c
@@ -157,12 +157,6 @@ static void agp_add_seg_to_client(struct
* some routine which does the conversion for you
*/
-static const pgprot_t my_protect_map[16] =
-{
- __P000, __P001, __P010, __P011, __P100, __P101, __P110, __P111,
- __S000, __S001, __S010, __S011, __S100, __S101, __S110, __S111
-};
-
static pgprot_t agp_convert_mmap_flags(int prot)
{
#define _trans(x,bit1,bit2) \
@@ -177,7 +171,7 @@ ((bit1==bit2)?(x&bit1):(x&bit1)?bit2:0)
prot_bits |= VM_SHARED;
- temp = my_protect_map[prot_bits & 0x0000000f];
+ temp = vm_get_page_prot(prot_bits & 0x0000000f);
return temp;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 990957e..52d6193 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1012,6 +1012,7 @@ static inline unsigned long vma_pages(st
return (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
}
+pgprot_t vm_get_page_prot(u8 vm_flags);
struct vm_area_struct *find_extend_vma(struct mm_struct *, unsigned long addr);
struct page *vmalloc_to_page(void *addr);
unsigned long vmalloc_to_pfn(void *addr);
diff --git a/mm/mmap.c b/mm/mmap.c
index c1868ec..d4c9b2a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -60,6 +60,12 @@ pgprot_t protection_map[16] = {
__S000, __S001, __S010, __S011, __S100, __S101, __S110, __S111
};
+pgprot_t vm_get_page_prot(u8 vm_flags)
+{
+ return protection_map[vm_flags];
+}
+EXPORT_SYMBOL(vm_get_page_prot);
+
int sysctl_overcommit_memory = OVERCOMMIT_GUESS; /* heuristic overcommit */
int sysctl_overcommit_ratio = 50; /* default is 50% */
int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
--
1.4.1.ga3e6
-
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