[PATCH 3/4] SunRPC: Use no_printk() for the null dprintk() anddfprintk()

From: David Howells
Date: Thu Sep 26 2013 - 10:45:45 EST

Use no_printk() for the null dprintk() and dfprintk() so that the compiler
doesn't complain about unused variables for stuff that's just printed.

Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---

fs/lockd/svc.c | 6 ++++--
fs/lockd/svclock.c | 6 ++++--
fs/nfs/fscache.c | 2 +-
fs/nfsd/nfs4proc.c | 6 ++----
fs/nfsd/nfsfh.c | 10 ++++++----
include/linux/sunrpc/debug.h | 37 ++++++++++++++++++-------------------
include/linux/sunrpc/sched.h | 15 +++++++--------
net/sunrpc/clnt.c | 4 ++--
net/sunrpc/sched.c | 11 +++--------
net/sunrpc/svcsock.c | 33 +++++++++++++++++++--------------
10 files changed, 66 insertions(+), 64 deletions(-)

diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 10d6c41..ba73105 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -147,7 +147,6 @@ lockd(void *vrqstp)
*/
while (!kthread_should_stop()) {
long timeout = MAX_SCHEDULE_TIMEOUT;
- RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);

/* update sv_maxconn if it has changed */
rqstp->rq_server->sv_maxconn = nlm_max_connections;
@@ -167,8 +166,11 @@ lockd(void *vrqstp)
err = svc_recv(rqstp, timeout);
if (err == -EAGAIN || err == -EINTR)
continue;
- dprintk("lockd: request from %s\n",
+ ifdebug(FACILITY) {
+ char buf[RPC_MAX_ADDRBUFLEN];
+ dprintk("lockd: request from %s\n",
svc_print_addr(rqstp, buf, sizeof(buf)));
+ }

svc_process(rqstp);
}
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index e066a39..2749f44 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -53,9 +53,9 @@ static const struct rpc_call_ops nlmsvc_grant_ops;
static LIST_HEAD(nlm_blocked);
static DEFINE_SPINLOCK(nlm_blocked_lock);

-#ifdef LOCKD_DEBUG
static const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie)
{
+#ifdef LOCKD_DEBUG
/*
* We can get away with a static buffer because we're only
* called with BKL held.
@@ -79,8 +79,10 @@ static const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie)
*p = '\0';

return buf;
-}
+#else
+ return "";
#endif
+}

/*
* Insert a blocked lock into the global list
diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c
index 24d1d1c..3e8e0aa 100644
--- a/fs/nfs/fscache.c
+++ b/fs/nfs/fscache.c
@@ -317,7 +317,7 @@ void nfs_fscache_reset_inode_cookie(struct inode *inode)
{
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_server *nfss = NFS_SERVER(inode);
- NFS_IFDEBUG(struct fscache_cookie *old = nfsi->fscache);
+ struct fscache_cookie *old = nfsi->fscache;

nfs_fscache_inode_lock(inode);
if (nfsi->fscache) {
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 419572f..1254635 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1172,9 +1172,7 @@ struct nfsd4_operation {

static struct nfsd4_operation nfsd4_ops[];

-#ifdef NFSD_DEBUG
static const char *nfsd4_op_name(unsigned opnum);
-#endif

/*
* Enforce NFSv4.1 COMPOUND ordering rules:
@@ -1842,14 +1840,14 @@ static struct nfsd4_operation nfsd4_ops[] = {
},
};

-#ifdef NFSD_DEBUG
static const char *nfsd4_op_name(unsigned opnum)
{
+#ifdef NFSD_DEBUG
if (opnum < ARRAY_SIZE(nfsd4_ops))
return nfsd4_ops[opnum].op_name;
+#endif
return "unknown_operation";
}
-#endif

#define nfsd4_voidres nfsd4_voidargs
struct nfsd4_voidargs { int dummy; };
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 814afaa..0aba73a 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -87,10 +87,12 @@ static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp,

/* Check if the request originated from a secure port. */
if (!rqstp->rq_secure && !(flags & NFSEXP_INSECURE_PORT)) {
- RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
- dprintk(KERN_WARNING
- "nfsd: request from insecure port %s!\n",
- svc_print_addr(rqstp, buf, sizeof(buf)));
+ ifdebug(FACILITY) {
+ char buf[RPC_MAX_ADDRBUFLEN];
+ dprintk(KERN_WARNING
+ "nfsd: request from insecure port %s!\n",
+ svc_print_addr(rqstp, buf, sizeof(buf)));
+ }
return nfserr_perm;
}

diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h
index 889474b..60116cb 100644
--- a/include/linux/sunrpc/debug.h
+++ b/include/linux/sunrpc/debug.h
@@ -38,30 +38,29 @@ extern unsigned int nlm_debug;
#undef ifdebug
#ifdef RPC_DEBUG
# define ifdebug(fac) if (unlikely(rpc_debug & RPCDBG_##fac))
-
-# define dfprintk(fac, fmt, ...) \
- do { \
- ifdebug(fac) \
- printk(KERN_DEFAULT fmt, ##__VA_ARGS__); \
- } while (0)
-
-# define dfprintk_rcu(fac, fmt, ...) \
- do { \
- ifdebug(fac) { \
- rcu_read_lock(); \
- printk(KERN_DEFAULT fmt, ##__VA_ARGS__); \
- rcu_read_unlock(); \
- } \
- } while (0)
-
+# define __dprintk(fmt, ...) printk(KERN_DEFAULT fmt, ##__VA_ARGS__);
# define RPC_IFDEBUG(x) x
#else
-# define ifdebug(fac) if (0)
-# define dfprintk(fac, fmt, ...) do {} while (0)
-# define dfprintk_rcu(fac, fmt, ...) do {} while (0)
+# define ifdebug(fac) if (0)
+# define __dprintk(fmt, ...) no_printk(KERN_DEFAULT fmt, ##__VA_ARGS__);
# define RPC_IFDEBUG(x)
#endif

+#define dfprintk(fac, fmt, ...) \
+ do { \
+ ifdebug(fac) \
+ __dprintk(fmt, ##__VA_ARGS__); \
+ } while (0)
+
+#define dfprintk_rcu(fac, fmt, ...) \
+ do { \
+ ifdebug(fac) { \
+ rcu_read_lock(); \
+ __dprintk(fmt, ##__VA_ARGS__); \
+ rcu_read_unlock(); \
+ } \
+ } while (0)
+
/*
* Sysctl interface for RPC debugging
*/
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index 01543d0..25523ca 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -250,23 +250,22 @@ static inline int rpc_wait_for_completion_task(struct rpc_task *task)
return __rpc_wait_for_completion_task(task, NULL);
}

-#if defined(RPC_DEBUG) || defined (RPC_TRACEPOINTS)
static inline const char * rpc_qname(const struct rpc_wait_queue *q)
{
- return ((q && q->name) ? q->name : "unknown");
+#if defined(RPC_DEBUG) || defined (RPC_TRACEPOINTS)
+ if (q && q->name)
+ return q->name;
+#endif
+ return "unknown";
}

static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
const char *name)
{
+#if defined(RPC_DEBUG) || defined (RPC_TRACEPOINTS)
q->name = name;
-}
-#else
-static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
- const char *name)
-{
-}
#endif
+}

static inline unsigned short rpc_task_pid(const struct rpc_task *t)
{
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index ef452a29..1c6d494 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1282,9 +1282,9 @@ rpc_restart_call(struct rpc_task *task)
}
EXPORT_SYMBOL_GPL(rpc_restart_call);

-#ifdef RPC_DEBUG
static const char *rpc_proc_name(const struct rpc_task *task)
{
+#ifdef RPC_DEBUG
const struct rpc_procinfo *proc = task->tk_msg.rpc_proc;

if (proc) {
@@ -1293,9 +1293,9 @@ static const char *rpc_proc_name(const struct rpc_task *task)
else
return "NULL";
} else
+#endif
return "no proc";
}
-#endif

/*
* 0. Initial state
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 0a4b07c..8e325f5 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -258,18 +258,13 @@ static int rpc_wait_bit_killable(void *word)
return 0;
}

-#if defined(RPC_DEBUG) || defined(RPC_TRACEPOINTS)
static void rpc_task_set_debuginfo(struct rpc_task *task)
{
+#if defined(RPC_DEBUG) || defined(RPC_TRACEPOINTS)
static atomic_t rpc_pid;
-
- rpc_task_pid(task) = atomic_inc_return(&rpc_pid);
-}
-#else
-static inline void rpc_task_set_debuginfo(struct rpc_task *task)
-{
-}
+ task->tk_pid = atomic_inc_return(&rpc_pid);
#endif
+}

static void rpc_set_active(struct rpc_task *task)
{
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 9c9caaa..67e890e 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -244,7 +244,6 @@ static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
int len = 0;
unsigned long tailoff;
unsigned long headoff;
- RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);

if (rqstp->rq_prot == IPPROTO_UDP) {
struct msghdr msg = {
@@ -267,9 +266,12 @@ static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
rqstp->rq_respages[0], tailoff);

out:
- dprintk("svc: socket %p sendto([%p %Zu... ], %d) = %d (addr %s)\n",
- svsk, xdr->head[0].iov_base, xdr->head[0].iov_len,
- xdr->len, len, svc_print_addr(rqstp, buf, sizeof(buf)));
+ ifdebug(FACILITY) {
+ char buf[RPC_MAX_ADDRBUFLEN];
+ dprintk("svc: socket %p sendto([%p %Zu... ], %d) = %d (addr %s)\n",
+ svsk, xdr->head[0].iov_base, xdr->head[0].iov_len,
+ xdr->len, len, svc_print_addr(rqstp, buf, sizeof(buf)));
+ }

return len;
}
@@ -809,7 +811,6 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt)
struct socket *newsock;
struct svc_sock *newsvsk;
int err, slen;
- RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);

dprintk("svc: tcp_accept %p sock %p\n", svsk, sock);
if (!sock)
@@ -839,14 +840,16 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt)
* hosts here, but when we get encryption, the IP of the host won't
* tell us anything. For now just warn about unpriv connections.
*/
- if (!svc_port_is_privileged(sin)) {
- dprintk(KERN_WARNING
- "%s: connect from unprivileged port: %s\n",
- serv->sv_name,
- __svc_print_addr(sin, buf, sizeof(buf)));
+ ifdebug(FACILITY) {
+ char buf[RPC_MAX_ADDRBUFLEN];
+ __svc_print_addr(sin, buf, sizeof(buf));
+ if (!svc_port_is_privileged(sin)) {
+ dprintk(KERN_WARNING
+ "%s: connect from unprivileged port: %s\n",
+ serv->sv_name, buf);
+ }
+ dprintk("%s: connect from %s\n", serv->sv_name, buf);
}
- dprintk("%s: connect from %s\n", serv->sv_name,
- __svc_print_addr(sin, buf, sizeof(buf)));

/* make sure that a write doesn't block forever when
* low on memory
@@ -1465,11 +1468,13 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv,
int newlen;
int family;
int val;
- RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);

- dprintk("svc: svc_create_socket(%s, %d, %s)\n",
+ ifdebug(FACILITY) {
+ char buf[RPC_MAX_ADDRBUFLEN];
+ dprintk("svc: svc_create_socket(%s, %d, %s)\n",
serv->sv_program->pg_name, protocol,
__svc_print_addr(sin, buf, sizeof(buf)));
+ }

if (protocol != IPPROTO_UDP && protocol != IPPROTO_TCP) {
printk(KERN_WARNING "svc: only UDP and TCP "

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