X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=arch%2Fia64%2Fkernel%2Fsys_ia64.c;h=9ef62a3fbfad5a37fad2df187603d7bb152f1468;hb=4a61f17378c2cdd9bd8f34ef8bd7422861d0c1f1;hp=40722d88607adf57de79dc158b08d769f767757b;hpb=ba290ab7dace8b3339c0cc86c221d48eed21e956;p=powerpc.git

diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c
index 40722d8860..9ef62a3fbf 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);