[patch 063/102] tile: use simpler API for random address requests

[patch 063/102] tile: use simpler API for random address requests

[akpm]

From: Jason Cooper <jason@lakedaemon.net>
Subject: tile: use simpler API for random address requests

Currently, all callers to randomize_range() set the length to 0 and
calculate end by adding a constant to the start address.  We can simplify
the API to remove a bunch of needless checks and variables.

Use the new randomize_addr(start, range) call to set the requested
address.

Link: http://lkml.kernel.org/r/20160803233913.32511-6-jason@lakedaemon.net
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/tile/mm/mmap.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff -puN arch/tile/mm/mmap.c~tile-use-simpler-api-for-random-address-requests arch/tile/mm/mmap.c
--- a/arch/tile/mm/mmap.c~tile-use-simpler-api-for-random-address-requests
+++ a/arch/tile/mm/mmap.c
@@ -88,6 +88,5 @@ void arch_pick_mmap_layout(struct mm_str
 
 unsigned long arch_randomize_brk(struct mm_struct *mm)
 {
-	unsigned long range_end = mm->brk + 0x02000000;
-	return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
+	return randomize_page(mm->brk, 0x02000000);
 }
_