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From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
Date: Sat, 11 Feb 2012 16:41:52 +0000 (UTC)
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Subject: svn commit: r231525 - head/sbin/hastd
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Author: pjd
Date: Sat Feb 11 16:41:52 2012
New Revision: 231525
URL: http://svn.freebsd.org/changeset/base/231525

Log:
  Nice range comparison.
  
  MFC after:	3 days

Modified:
  head/sbin/hastd/rangelock.c

Modified: head/sbin/hastd/rangelock.c
==============================================================================
--- head/sbin/hastd/rangelock.c	Sat Feb 11 16:34:03 2012	(r231524)
+++ head/sbin/hastd/rangelock.c	Sat Feb 11 16:41:52 2012	(r231525)
@@ -128,15 +128,13 @@ bool
 rangelock_islocked(struct rangelocks *rls, off_t offset, off_t length)
 {
 	struct rlock *rl;
+	off_t end;
 
 	PJDLOG_ASSERT(rls->rls_magic == RANGELOCKS_MAGIC);
 
+	end = offset + length;
 	TAILQ_FOREACH(rl, &rls->rls_locks, rl_next) {
-		if (rl->rl_start >= offset && rl->rl_start < offset + length)
-			break;
-		else if (rl->rl_end > offset && rl->rl_end <= offset + length)
-			break;
-		else if (rl->rl_start < offset && rl->rl_end > offset + length)
+		if (rl->rl_start < end && rl->rl_end > offset)
 			break;
 	}
 	return (rl != NULL);