From: Theodore Ts'o <tytso@mit.edu>
Date: Thu, 6 Jun 2013 15:40:37 +0000 (-0400)
Subject: ext4: optimize test_root()
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~83^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4afb4f4e3e9af626ad695c87e4f9aaa780b29ec;p=pandora-kernel.git

ext4: optimize test_root()

The test_root() function could potentially loop forever due to
overflow issues.  So rewrite test_root() to avoid this issue; as a
bonus, it is 38% faster when benchmarked via a test loop:

int main(int argc, char **argv)
{
	int  i;

	for (i = 0; i < 1 << 24; i++) {
		if (test_root(i, 7))
			printf("%d\n", i);
	}
}

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

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