1 files changed, 16 insertions, 12 deletions

diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c
index 40722d88607a..9ef62a3fbfad 100644
--- a/arch/ia64/kernel/sys_ia64.c
+++ b/arch/ia64/kernel/sys_ia64.c
@@ -163,10 +163,25 @@ sys_pipe (void)
         return retval;
 }
 
+int ia64_mmap_check(unsigned long addr, unsigned long len,
+                unsigned long flags)
+{
+        unsigned long roff;
+
+        /*
+         * Don't permit mappings into unmapped space, the virtual page table
+         * of a region, or across a region boundary.  Note: RGN_MAP_LIMIT is
+         * equal to 2^n-PAGE_SIZE (for some integer n <= 61) and len > 0.
+         */
+        roff = REGION_OFFSET(addr);
+        if ((len > RGN_MAP_LIMIT) || (roff > (RGN_MAP_LIMIT - len)))
+                return -EINVAL;
+        return 0;
+}
+
 static inline unsigned long
 do_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, unsigned long pgoff)
 {
-        unsigned long roff;
         struct file *file = NULL;
 
         flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
@@ -188,17 +203,6 @@ do_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, un
                 goto out;
         }
 
-        /*
-         * Don't permit mappings into unmapped space, the virtual page table of a region,
-         * or across a region boundary.  Note: RGN_MAP_LIMIT is equal to 2^n-PAGE_SIZE
-         * (for some integer n <= 61) and len > 0.
-         */
-        roff = REGION_OFFSET(addr);
-        if ((len > RGN_MAP_LIMIT) || (roff > (RGN_MAP_LIMIT - len))) {
-                addr = -EINVAL;
-                goto out;
-        }
-
         down_write(&current->mm->mmap_sem);
         addr = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
         up_write(&current->mm->mmap_sem);