Commit 09fddbaf authored Oct 11, 2016 by Jason Cooper Committed by Linus Torvalds Oct 11, 2016

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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent fa5114c7

arch/tile/mm/mmap.c

+1 −2

Original line number	Original line	Diff line number	Diff line
	@@ -88,6 +88,5 @@ void arch_pick_mmap_layout(struct mm_struct *mm)

	unsigned long arch_randomize_brk(struct mm_struct *mm)		unsigned long arch_randomize_brk(struct mm_struct *mm)
	{		{
	unsigned long range_end = mm->brk + 0x02000000;		return randomize_page(mm->brk, 0x02000000);
	return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
	}		}

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