[PATCH v2 1/2] mm: Handle prefault for size = 2GB

[Sagar Arun Kamble]

i915 gem_exec_reloc subtests *-31 exercise relocation entries object
that is of size 2GB. This patch will allow prefaulting for 2GB size.

v2: Prefaulting size changed to size_t (Joonas).

Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
---
 include/linux/pagemap.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 84943e8..caafc29 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -529,7 +529,7 @@ static inline void wait_on_page_writeback(struct page *page)
 /*
  * Fault everything in given userspace address range in.
  */
-static inline int fault_in_pages_writeable(char __user *uaddr, int size)
+static inline int fault_in_pages_writeable(char __user *uaddr, size_t size)
 {
 	char __user *end = uaddr + size - 1;
 
@@ -556,7 +556,7 @@ static inline int fault_in_pages_writeable(char __user *uaddr, int size)
 	return 0;
 }
 
-static inline int fault_in_pages_readable(const char __user *uaddr, int size)
+static inline int fault_in_pages_readable(const char __user *uaddr, size_t size)
 {
 	volatile char c;
 	const char __user *end = uaddr + size - 1;
-- 
1.9.1