linux-kernel - [PATCH] fs/jffs2: kill warning RE debug-only variables

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Message-ID: <20061004115718.GA22386@havoc.gtf.org>
Date:	Wed, 4 Oct 2006 07:57:18 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	dwmw2@...radead.org, Andrew Morton <akpm@...l.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] fs/jffs2: kill warning RE debug-only variables


gcc emits the following warning on a 'allmodconfig' build:

fs/jffs2/xattr.c: In function ‘unrefer_xattr_datum’:
fs/jffs2/xattr.c:402: warning: unused variable ‘version’
fs/jffs2/xattr.c:402: warning: unused variable ‘xid’

Given that these variables are only used in the debug printk, and they
merely remove a deref, we can easily kill the warning by adding the
derefs to the debug printk.

Signed-off-by: Jeff Garzik <jeff@...zik.org>

---

 fs/jffs2/xattr.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c
index 4da09ce..4bb3f18 100644
--- a/fs/jffs2/xattr.c
+++ b/fs/jffs2/xattr.c
@@ -399,8 +399,6 @@ static void unrefer_xattr_datum(struct j
 {
 	/* must be called under down_write(xattr_sem) */
 	if (atomic_dec_and_lock(&xd->refcnt, &c->erase_completion_lock)) {
-		uint32_t xid = xd->xid, version = xd->version;
-
 		unload_xattr_datum(c, xd);
 		xd->flags |= JFFS2_XFLAGS_DEAD;
 		if (xd->node == (void *)xd) {
@@ -411,7 +409,8 @@ static void unrefer_xattr_datum(struct j
 		}
 		spin_unlock(&c->erase_completion_lock);
 
-		dbg_xattr("xdatum(xid=%u, version=%u) was removed.\n", xid, version);
+		dbg_xattr("xdatum(xid=%u, version=%u) was removed.\n",
+			  xd->xid, xd->version);
 	}
 }
 
-
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