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Date: Tue, 26 Jul 2016 03:01:59 +0000
From: Jason Cooper <jason@...edaemon.net>
To: william.c.roberts@...el.com,
	linux-mm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel-hardening@...ts.openwall.com
Cc: Jason Cooper <jason@...edaemon.net>,
	linux@....linux.org.uk,
	akpm@...ux-foundation.org,
	keescook@...omium.org,
	tytso@....edu,
	arnd@...db.de,
	gregkh@...uxfoundation.org,
	catalin.marinas@....com,
	will.deacon@....com,
	ralf@...ux-mips.org,
	benh@...nel.crashing.org,
	paulus@...ba.org,
	mpe@...erman.id.au,
	davem@...emloft.net,
	tglx@...utronix.de,
	mingo@...hat.com,
	hpa@...or.com,
	x86@...nel.org,
	viro@...iv.linux.org.uk,
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Subject: [RFC patch 5/6] 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.

Signed-off-by: Jason Cooper <jason@...edaemon.net>
---
 arch/tile/mm/mmap.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/tile/mm/mmap.c b/arch/tile/mm/mmap.c
index 851a94e6ae58..50f6a693a2b6 100644
--- a/arch/tile/mm/mmap.c
+++ b/arch/tile/mm/mmap.c
@@ -88,6 +88,5 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
 
 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_addr(mm->brk, 0x02000000);
 }
-- 
2.9.2

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