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authorJeff Layton <jlayton@redhat.com>2011-01-20 13:36:51 -0500
committerSteve French <sfrench@us.ibm.com>2011-01-20 21:46:29 +0000
commit690c522fa5a62825af880775e3ef1e55755667b2 (patch)
treeff953bba1050b54cc9be452a599ac1faf580c3b7 /fs/cifs/transport.c
parentaae62fdb6b9a6605abdea7370c4a0e005e6c1cd7 (diff)
cifs: use get/put_unaligned functions to access ByteCount
It's possible that when we access the ByteCount that the alignment will be off. Most CPUs deal with that transparently, but there's usually some performance impact. Some CPUs raise an exception on unaligned accesses. Fix this by accessing the byte count using the get_unaligned and put_unaligned inlined functions. While we're at it, fix the types of some of the variables that end up getting returns from these functions. Acked-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/transport.c')
-rw-r--r--fs/cifs/transport.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index c8e2808cd5e..c1ccca1a933 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -484,7 +484,7 @@ send_nt_cancel(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
in_buf->smb_buf_length = sizeof(struct smb_hdr) - 4 + 2;
in_buf->Command = SMB_COM_NT_CANCEL;
in_buf->WordCount = 0;
- BCC_LE(in_buf) = 0;
+ put_bcc_le(0, in_buf);
mutex_lock(&server->srv_mutex);
rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
@@ -632,8 +632,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
if (receive_len >= sizeof(struct smb_hdr) - 4
/* do not count RFC1001 header */ +
(2 * midQ->resp_buf->WordCount) + 2 /* bcc */ )
- BCC(midQ->resp_buf) =
- le16_to_cpu(BCC_LE(midQ->resp_buf));
+ put_bcc(get_bcc_le(midQ->resp_buf), midQ->resp_buf);
if ((flags & CIFS_NO_RESP) == 0)
midQ->resp_buf = NULL; /* mark it so buf will
not be freed by
@@ -776,7 +775,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
if (receive_len >= sizeof(struct smb_hdr) - 4
/* do not count RFC1001 header */ +
(2 * out_buf->WordCount) + 2 /* bcc */ )
- BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
+ put_bcc(get_bcc_le(midQ->resp_buf), midQ->resp_buf);
} else {
rc = -EIO;
cERROR(1, "Bad MID state?");
@@ -977,7 +976,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
if (receive_len >= sizeof(struct smb_hdr) - 4
/* do not count RFC1001 header */ +
(2 * out_buf->WordCount) + 2 /* bcc */ )
- BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
+ put_bcc(get_bcc_le(out_buf), out_buf);
out:
delete_mid(midQ);