The patch titled
knfsd: simplify a 'while' condition in svcsock.c
has been added to the -mm tree. Its filename is
knfsd-simplify-a-while-condition-in-svcsockc.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: knfsd: simplify a 'while' condition in svcsock.c
From: NeilBrown <neilb@xxxxxxx>
This while loop has an overly complex condition, which performs a couple of
assignments. This hurts readability.
We don't really need a loop at all. We can just return -EAGAIN and (providing
we set SK_DATA), the function will be called again.
So discard the loop, make the complex conditional become a few clear function
calls, and hopefully improve readability.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
net/sunrpc/svcsock.c | 21 +++++++++++++--------
1 files changed, 13 insertions(+), 8 deletions(-)
diff -puN net/sunrpc/svcsock.c~knfsd-simplify-a-while-condition-in-svcsockc net/sunrpc/svcsock.c
--- a/net/sunrpc/svcsock.c~knfsd-simplify-a-while-condition-in-svcsockc
+++ a/net/sunrpc/svcsock.c
@@ -788,15 +788,20 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
}
clear_bit(SK_DATA, &svsk->sk_flags);
- while ((err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
- 0, 0, MSG_PEEK | MSG_DONTWAIT)) < 0 ||
- (skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err)) == NULL) {
- if (err == -EAGAIN) {
- svc_sock_received(svsk);
- return err;
+ skb = NULL;
+ err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
+ 0, 0, MSG_PEEK | MSG_DONTWAIT);
+ if (err >= 0)
+ skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err);
+
+ if (skb == NULL) {
+ if (err != -EAGAIN) {
+ /* possibly an icmp error */
+ dprintk("svc: recvfrom returned error %d\n", -err);
+ set_bit(SK_DATA, &svsk->sk_flags);
}
- /* possibly an icmp error */
- dprintk("svc: recvfrom returned error %d\n", -err);
+ svc_sock_received(svsk);
+ return -EAGAIN;
}
rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
if (skb->tstamp.tv64 == 0) {
_
Patches currently in -mm which might be from neilb@xxxxxxx are
origin.patch
fix-quadratic-behavior-of-shrink_dcache_parent.patch
freezer-add-try_to_freeze-calls-to-all-kernel-threads.patch
nlmclnt_recovery-dont-use-clone_sighand.patch
introduce-freezer-flags-rev-2.patch
the-nfsv2-nfsv3-server-does-not-handle-zero-length-write.patch
knfsd-rename-sk_defer_lock-to-sk_lock.patch
nfsd-nfs4state-remove-unnecessary-daemonize-call.patch
rpc-add-wrapper-for-svc_reserve-to-account-for-checksum.patch
rpc-add-wrapper-for-svc_reserve-to-account-for-checksum-fix.patch
sunrpc-fix-error-path-in-module_init.patch
knfsd-avoid-use-of-unitialised-variables-on-error-path-when-nfs-exports.patch
knfsd-rpc-fix-server-side-wrapping-of-krb5i-replies.patch
knfsd-fix-resource-leak-resulting-in-module-refcount-leak-for-rpcsec_gss_krb5ko.patch
knfsd-rpcgss-rpc_gss_proc_-destroy-request-will-get-a-bad-rpc.patch
knfsd-simplify-a-while-condition-in-svcsockc.patch
knfsd-trivial-makefile-cleanup.patch
knfsd-various-nfsd-xdr-cleanups.patch
knfsd-avoid-oops-if-buggy-userspace-performs-confusing-filehandle-dentry-mapping.patch
readahead-nfsd-case.patch
drivers-mdc-use-array_size-macro-when-appropriate.patch
md-cleanup-use-seq_release_private-where-appropriate.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
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