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Date: Wed, 20 Feb 2008 19:30:22 +0300
From: Pavel Emelyanov <xemul@...nvz.org>
To: "J. Bruce Fields" <bfields@...ldses.org>
CC: Joe Perches <joe@...ches.com>,
Linux Netdev List <netdev@...r.kernel.org>
Subject: [PATCH] SUNRPC: Compile out bufs for debug printks
There are many places, which declare the char buf[...] on the stack
to push it later into dprintk(). Since the dprintk sometimes (if the
CONFIG_SYSCTL=n) becomes an empty do { } while (0) stub, these buffers
cause gcc to produce appropriate warnings.
Introduce a macro that declares that buf as __maybe_unused.
More candidates for patching are found by Joe Perches.
Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>
---
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 0822646..b7e179e 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -153,7 +153,7 @@ lockd(struct svc_rqst *rqstp)
*/
while ((nlmsvc_users || !signalled()) && nlmsvc_pid == current->pid) {
long timeout = MAX_SCHEDULE_TIMEOUT;
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
if (signalled()) {
flush_signals(current);
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index 385437e..5643f44 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -436,7 +436,7 @@ nlm4svc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
dprintk("lockd: SM_NOTIFY called\n");
if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)
|| ntohs(saddr.sin_port) >= 1024) {
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
svc_print_addr(rqstp, buf, sizeof(buf)));
return rpc_system_err;
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index 88379cc..5f0cf50 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -468,7 +468,7 @@ nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
dprintk("lockd: SM_NOTIFY called\n");
if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)
|| ntohs(saddr.sin_port) >= 1024) {
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
svc_print_addr(rqstp, buf, sizeof(buf)));
return rpc_system_err;
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index bd185a5..33950dc 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -165,7 +165,7 @@ void nfs_callback_down(void)
static int nfs_callback_authenticate(struct svc_rqst *rqstp)
{
struct nfs_client *clp;
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
/* Don't talk to strangers */
clp = nfs_find_client(svc_addr(rqstp), 4);
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 8fbd2dc..94fe70e 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -101,7 +101,7 @@ static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp,
{
/* Check if the request originated from a secure port. */
if (!rqstp->rq_secure && EX_SECURE(exp)) {
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
dprintk(KERN_WARNING
"nfsd: request from insecure port %s!\n",
svc_print_addr(rqstp, buf, sizeof(buf)));
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 977a71f..66383ae 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -148,7 +148,7 @@ nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
*/
if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
printk(KERN_NOTICE
"oversized read request from %s (%d bytes)\n",
svc_print_addr(rqstp, buf, sizeof(buf)),
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 64c9755..fd701e6 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -402,6 +402,8 @@ char * svc_print_addr(struct svc_rqst *, char *, size_t);
#define RPC_MAX_ADDRBUFLEN (63U)
+#define DECLARE_RPC_BUF(name) char name[RPC_MAX_ADDRBUFLEN] __maybe_unused
+
/*
* When we want to reduce the size of the reserved space in the response
* buffer, we need to take into account the size of any checksum data that
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index a290e15..895d365 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -813,7 +813,7 @@ svc_printk(struct svc_rqst *rqstp, const char *fmt, ...)
{
va_list args;
int r;
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
if (!net_ratelimit())
return 0;
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 1d3e5fc..87dc4bc 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -175,7 +175,7 @@ static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
size_t base = xdr->page_base;
unsigned int pglen = xdr->page_len;
unsigned int flags = MSG_MORE;
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
slen = xdr->len;
@@ -716,7 +716,7 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt)
struct socket *newsock;
struct svc_sock *newsvsk;
int err, slen;
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
dprintk("svc: tcp_accept %p sock %p\n", svsk, sock);
if (!sock)
@@ -1206,7 +1206,7 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv,
struct socket *sock;
int error;
int type;
- char buf[RPC_MAX_ADDRBUFLEN];
+ DECLARE_RPC_BUF(buf);
struct sockaddr_storage addr;
struct sockaddr *newsin = (struct sockaddr *)&addr;
int newlen;
--
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