[PATCH] sunrpc & nfs: Add and use dprintk_cont macros

[Joe Perches]

Allow line continuations to work properly with KERN_CONT.

Signed-off-by: Joe Perches <j...@perches.com>
---
 fs/nfs/write.c               |  6 ++---
 include/linux/sunrpc/debug.h | 57 ++++++++++++++++++++++++++++++--------------
 2 files changed, 42 insertions(+), 21 deletions(-)

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 53211838f72a..508efa813475 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1788,7 +1788,7 @@ static void nfs_commit_release_pages(struct 
nfs_commit_data *data)
                if (status < 0) {
                        nfs_context_set_write_error(req->wb_context, status);
                        nfs_inode_remove_request(req);
-                       dprintk(", error = %d\n", status);
+                       dprintk_cont(", error = %d\n", status);
                        goto next;
                }
 
@@ -1797,11 +1797,11 @@ static void nfs_commit_release_pages(struct 
nfs_commit_data *data)
                if (!nfs_write_verifier_cmp(&req->wb_verf, 
&data->verf.verifier)) {
                        /* We have a match */
                        nfs_inode_remove_request(req);
-                       dprintk(" OK\n");
+                       dprintk_cont(" OK\n");
                        goto next;
                }
                /* We have a mismatch. Write the page again */
-               dprintk(" mismatch\n");
+               dprintk_cont(" mismatch\n");
                nfs_mark_request_dirty(req);
                set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags);
        next:
diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h
index 59a7889e15db..a44c479b09e0 100644
--- a/include/linux/sunrpc/debug.h
+++ b/include/linux/sunrpc/debug.h
@@ -20,33 +20,54 @@ extern unsigned int         nfsd_debug;
 extern unsigned int            nlm_debug;
 #endif
 
-#define dprintk(args...)       dfprintk(FACILITY, ## args)
-#define dprintk_rcu(args...)   dfprintk_rcu(FACILITY, ## args)
+#define dprintk(fmt, ...)                                              \
+       dfprintk(FACILITY, fmt, ##__VA_ARGS__)
+#define dprintk_cont(fmt, ...)                                         \
+       dfprintk_cont(FACILITY, fmt, ##__VA_ARGS__)
+#define dprintk_rcu(fmt, ...)                                          \
+       dfprintk_rcu(FACILITY, fmt, ##__VA_ARGS__)
+#define dprintk_rcu_cont(fmt, ...)                                     \
+       dfprintk_rcu_cont(FACILITY, fmt, ##__VA_ARGS__)
 
 #undef ifdebug
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
 # define ifdebug(fac)          if (unlikely(rpc_debug & RPCDBG_##fac))
 
-# define dfprintk(fac, args...)        \
-       do { \
-               ifdebug(fac) \
-                       printk(KERN_DEFAULT args); \
-       } while (0)
-
-# define dfprintk_rcu(fac, args...)    \
-       do { \
-               ifdebug(fac) { \
-                       rcu_read_lock(); \
-                       printk(KERN_DEFAULT args); \
-                       rcu_read_unlock(); \
-               } \
-       } while (0)
+# define dfprintk(fac, fmt, ...)                                       \
+do {                                                                   \
+       ifdebug(fac)                                                    \
+               printk(KERN_DEFAULT fmt, ##__VA_ARGS__);                \
+} while (0)
+
+# define dfprintk_cont(fac, fmt, ...)                                  \
+do {                                                                   \
+       ifdebug(fac)                                                    \
+               printk(KERN_CONT 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 dfprintk_rcu_cont(fac, fmt, ...)                              \
+do {                                                                   \
+       ifdebug(fac) {                                                  \
+               rcu_read_lock();                                        \
+               printk(KERN_CONT fmt, ##__VA_ARGS__);                   \
+               rcu_read_unlock();                                      \
+       }                                                               \
+} while (0)
 
 # define RPC_IFDEBUG(x)                x
 #else
 # define ifdebug(fac)          if (0)
-# define dfprintk(fac, args...)        do {} while (0)
-# define dfprintk_rcu(fac, args...)    do {} while (0)
+# define dfprintk(fac, fmt, ...)       do {} while (0)
+# define dfprintk_rcu(fac, fmt, ...)   do {} while (0)
 # define RPC_IFDEBUG(x)
 #endif
 
-- 
2.10.0.rc2.1.g053435c