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authorChuck Lever <chuck.lever@oracle.com>2011-01-28 18:40:55 +0100
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-01-28 19:37:35 +0100
commitc08e76d0cd4beb759a73c1835d98f5fccc126ed1 (patch)
treee1cd5414a2aba7c4e414bf93473f599c40717d80 /fs/nfs/nfs4xdr.c
parentNFS: Fix an NFS client lockdep issue (diff)
downloadlinux-c08e76d0cd4beb759a73c1835d98f5fccc126ed1.tar.xz
linux-c08e76d0cd4beb759a73c1835d98f5fccc126ed1.zip
NFS: Micro-optimize nfs4_decode_dirent()
Make the decoding of NFSv4 directory entries slightly more efficient by: 1. Avoiding unnecessary byte swapping when checking XDR booleans, and 2. Not bumping "p" when its value will be immediately replaced by xdr_inline_decode() This commit makes nfs4_decode_dirent() consistent with similar logic in the other two decode_dirent() functions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to '')
-rw-r--r--fs/nfs/nfs4xdr.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 2ab8e5cb8f59..009aef9e12bc 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -6086,11 +6086,11 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
__be32 *p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
- if (!ntohl(*p++)) {
+ if (*p == xdr_zero) {
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
- if (!ntohl(*p++))
+ if (*p == xdr_zero)
return -EAGAIN;
entry->eof = 1;
return -EBADCOOKIE;
@@ -6101,7 +6101,7 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
goto out_overflow;
entry->prev_cookie = entry->cookie;
p = xdr_decode_hyper(p, &entry->cookie);
- entry->len = ntohl(*p++);
+ entry->len = be32_to_cpup(p);
p = xdr_inline_decode(xdr, entry->len);
if (unlikely(!p))