commit 2c6a10161d0b5fc047b5bd81b03693b9af99fab5
author Al Viro <viro@zeniv.linux.org.uk> Thu Dec 03 19:40:46 2009 -0500
committer Al Viro <viro@zeniv.linux.org.uk> Fri Dec 11 06:44:58 2009 -0500
tree 298916728f640d1ae156a6dfc855b1c8f6c46e37
parent 9206de95b1ea68357996ec02be5db0638a0de2c1

switch do_brk() to get_unmapped_area()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mm/mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index c04146d..ed70a68 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1985,20 +1985,14 @@
 	if (!len)
 		return addr;
 
-	if ((addr + len) > TASK_SIZE || (addr + len) < addr)
-		return -EINVAL;
-
-	if (is_hugepage_only_range(mm, addr, len))
-		return -EINVAL;
-
 	error = security_file_mmap(NULL, 0, 0, 0, addr, 1);
 	if (error)
 		return error;
 
 	flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;
 
-	error = arch_mmap_check(addr, len, flags);
-	if (error)
+	error = get_unmapped_area(NULL, addr, len, 0, MAP_FIXED);
+	if (error & ~PAGE_MASK)
 		return error;
 
 	/*