linux-kernel - [PATCH 1/8] iommu-helper: Simplify find_next_zero

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Date:	Fri,  9 Oct 2009 17:29:14 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Cc:	Akinobu Mita <akinobu.mita@...il.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Subject: [PATCH 1/8] iommu-helper: Simplify find_next_zero_area

Use find_next_bit instead of doing test_bit for each bit

Cc: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
---
 lib/iommu-helper.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c
index 75dbda0..dddbf22 100644
--- a/lib/iommu-helper.c
+++ b/lib/iommu-helper.c
@@ -21,11 +21,10 @@ again:
 	end = index + nr;
 	if (end >= size)
 		return -1;
-	for (i = index; i < end; i++) {
-		if (test_bit(i, map)) {
-			start = i+1;
-			goto again;
-		}
+	i = find_next_bit(map, end, index);
+	if (i < end) {
+		start = i + 1;
+		goto again;
 	}
 	return index;
 }
-- 
1.5.4.3

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