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authorDavid Howells <dhowells@redhat.com>2018-10-20 00:57:56 +0100
committerDavid Howells <dhowells@redhat.com>2018-10-24 00:41:07 +0100
commitaa563d7bca6e882ec2bdae24603c8f016401a144 (patch)
tree874b10fc11da3178e4630f7a430e1b299d3b3806 /net/ceph
parent00e23707442a75b404392cef1405ab4fd498de6b (diff)
downloadlinux-stericsson-aa563d7bca6e882ec2bdae24603c8f016401a144.tar.gz
iov_iter: Separate type from direction and use accessor functions
In the iov_iter struct, separate the iterator type from the iterator direction and use accessor functions to access them in most places. Convert a bunch of places to use switch-statements to access them rather then chains of bitwise-AND statements. This makes it easier to add further iterator types. Also, this can be more efficient as to implement a switch of small contiguous integers, the compiler can use ~50% fewer compare instructions than it has to use bitwise-and instructions. Further, cease passing the iterator type into the iterator setup function. The iterator function can set that itself. Only the direction is required. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/ceph')
-rw-r--r--net/ceph/messenger.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 0a187196aeed..e493ff77b378 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -526,7 +526,7 @@ static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len)
if (!buf)
msg.msg_flags |= MSG_TRUNC;
- iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, len);
+ iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, len);
r = sock_recvmsg(sock, &msg, msg.msg_flags);
if (r == -EAGAIN)
r = 0;
@@ -545,7 +545,7 @@ static int ceph_tcp_recvpage(struct socket *sock, struct page *page,
int r;
BUG_ON(page_offset + length > PAGE_SIZE);
- iov_iter_bvec(&msg.msg_iter, READ | ITER_BVEC, &bvec, 1, length);
+ iov_iter_bvec(&msg.msg_iter, READ, &bvec, 1, length);
r = sock_recvmsg(sock, &msg, msg.msg_flags);
if (r == -EAGAIN)
r = 0;
@@ -607,7 +607,7 @@ static int ceph_tcp_sendpage(struct socket *sock, struct page *page,
else
msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */
- iov_iter_bvec(&msg.msg_iter, WRITE | ITER_BVEC, &bvec, 1, size);
+ iov_iter_bvec(&msg.msg_iter, WRITE, &bvec, 1, size);
ret = sock_sendmsg(sock, &msg);
if (ret == -EAGAIN)
ret = 0;