From: NeilBrown <neilb@suse.de>
Date: Wed, 23 Jun 2010 01:53:40 +0000 (+1000)
Subject: Check we haven't allocated too many flags.
X-Git-Url: http://git.neil.brown.name/?a=commitdiff_plain;h=5a155c9fc30cb18ed5c145b4812e6408fcacb77f;p=LaFS.git

Check we haven't allocated too many flags.

Simple compile-time checking that we haven't
allocated too many B_* flags.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/state.h b/state.h
index 26c0cd6..f35e2e8 100644
--- a/state.h
+++ b/state.h
@@ -472,6 +472,8 @@ enum {
 			 * Gets allocated to '0'.
 			 * Flag only set under B_IOLock.
 			 */
+
+	B_NUM_FLAGS
 };
 /* indexing info stays in the block, not in the inode */
 struct lafs_inode {
diff --git a/super.c b/super.c
index e676167..e2e8a03 100644
--- a/super.c
+++ b/super.c
@@ -876,6 +876,8 @@ static int __init lafs_init(void)
 {
 	int err;
 
+	BUILD_BUG_ON(B_NUM_FLAGS > 32);
+
 	err = lafs_ihash_init();
 	if (err)
 		goto out;