linux-kernel - [PATCH] iommu-helper: segment boundary limit should be a power of 2

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Message-Id: <20080216180935E.tomof@acm.org>
Date:	Sat, 16 Feb 2008 18:09:36 +0900
From:	FUJITA Tomonori <tomof@....org>
To:	linux-kernel@...r.kernel.org
Cc:	fujita.tomonori@....ntt.co.jp
Subject: [PATCH] iommu-helper: segment boundary limit should be a power of 2

The segment boundary limit should be a power of 2 so let's make it
clear.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
---
 lib/iommu-helper.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c
index 495575a..de0eced 100644
--- a/lib/iommu-helper.c
+++ b/lib/iommu-helper.c
@@ -54,6 +54,8 @@ unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
 			       unsigned long align_mask)
 {
 	unsigned long index;
+
+	BUG_ON(!is_power_of_2(boundary_size));
 again:
 	index = find_next_zero_area(map, size, start, nr, align_mask);
 	if (index != -1) {
-- 
1.5.3.7

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