linux-kernel - [PATCH][1/2] NFS2: Calculate 'w' a bit later in nfsaclsvc_encode

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Message-Id: <200611211234.14027.jesper.juhl@gmail.com>
Date:	Tue, 21 Nov 2006 12:34:13 +0100
From:	Jesper Juhl <jesper.juhl@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Andreas Gruenbacher <agruen@...e.de>,
	Neil Brown <neilb@....unsw.edu.au>, nfs@...ts.sourceforge.net,
	David Rientjes <rientjes@...washington.edu>,
	Andrew Morton <akpm@...l.org>,
	Jesper Juhl <jesper.juhl@...il.com>
Subject: [PATCH][1/2] NFS2: Calculate 'w' a bit later in nfsaclsvc_encode_getaclres()

NFS2: Calculate 'w' a bit later in nfsaclsvc_encode_getaclres()
      This is a small performance optimization since we can return before
      needing 'w'. It also saves a few bytes of .text :
      Before:
           text    data     bss     dec     hex filename
           2406     212       0    2618     a3a fs/nfsd/nfs2acl.o
      After:
           text    data     bss     dec     hex filename
           2400     212       0    2612     a34 fs/nfsd/nfs2acl.o


Signed-off-by: Jesper Juhl <jesper.juhl@...il.com>

 fs/nfsd/nfs2acl.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
index e3eca08..edde5dc 100644
--- a/fs/nfsd/nfs2acl.c
+++ b/fs/nfsd/nfs2acl.c
@@ -222,12 +222,10 @@ static int nfsaclsvc_encode_getaclres(st
 {
 	struct dentry *dentry = resp->fh.fh_dentry;
 	struct inode *inode = dentry->d_inode;
-	int w = nfsacl_size(
-		(resp->mask & NFS_ACL)   ? resp->acl_access  : NULL,
-		(resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
 	struct kvec *head = rqstp->rq_res.head;
 	unsigned int base;
 	int n;
+	int w;
 
 	if (dentry == NULL || dentry->d_inode == NULL)
 		return 0;
@@ -239,7 +237,9 @@ static int nfsaclsvc_encode_getaclres(st
 		return 0;
 	base = (char *)p - (char *)head->iov_base;
 
-	rqstp->rq_res.page_len = w;
+	rqstp->rq_res.page_len = w = nfsacl_size(
+		(resp->mask & NFS_ACL)   ? resp->acl_access  : NULL,
+		(resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
 	while (w > 0) {
 		if (!rqstp->rq_respages[rqstp->rq_resused++])
 			return 0;


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