On Fri, 2019-02-15 at 10:22 -0800, Eric Dumazet wrote:
> On Fri, Feb 15, 2019 at 10:13 AM Cong Wang <xiyou.wangc...@gmail.com> wrote:
> > On Fri, Feb 15, 2019 at 8:26 AM Eric Dumazet <eduma...@google.com> wrote:
> > > On Fri, Feb 15, 2019 at 6:50 AM Yafang Shao <laoar.s...@gmail.com> wrote:
> > > > As SOCK_DEBUG() isn't used any more, we can get ride of it now.
> > > > 
> > > 
> > > No, we are still using this infrastructure from time to time.
> > > 
> > > I told you I agreed to remove the current (obsolete) TCP call sites,
> > >  I never suggested to remove SOCK_DEBUG() completely.
> > 
> > Since when do we upstream care about any out-of-tree users?
> > 
> > You can always carry a patch to keep it downstream if you want,
> > no one can stop you doing it.
> 
> Somehow the patch series seems to present things in this way :
> 
> Eric Dumazet suggested to remove completely the SOCK_DEBUG() interface.

Well, you kinda did.
It's certainly reasonable to interpret what you wrote as such.

On Tue, 2019-02-12 at 18:15 -0800, Eric Dumazet wrote:
> Just remove all SOCK_DEBUG() calls, there are leftovers of very ancient times.

My suggestion would be to undefine SOCK_DEBUGGING.

Something like:
---
 include/net/sock.h | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index 328cb7cb7b0b..7e39bdfa342a 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -81,14 +81,17 @@
  */
 
 /* Define this to get the SOCK_DBG debugging facility. */
-#define SOCK_DEBUGGING
+/* #define SOCK_DEBUGGING */
 #ifdef SOCK_DEBUGGING
-#define SOCK_DEBUG(sk, msg...) do { if ((sk) && sock_flag((sk), SOCK_DBG)) \
-                                       printk(KERN_DEBUG msg); } while (0)
+#define SOCK_DEBUG(sk, fmt, ...)                               \
+do {                                                           \
+       if ((sk) && sock_flag((sk), SOCK_DBG))                  \
+               printk(KERN_DEBUG fmt, ##__VA_ARGS__);          \
+} while (0)
 #else
 /* Validate arguments and do nothing */
-static inline __printf(2, 3)
-void SOCK_DEBUG(const struct sock *sk, const char *msg, ...)
+__printf(2, 3)
+static inline void SOCK_DEBUG(const struct sock *sk, const char *fmt, ...)
 {
 }
 #endif


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