compat: remove compat_printk()

After 7e8e385aaf6e ("x86/compat: Remove sys32_vm86_warning"), this
function has become unused, so we can remove it as well.

Link: http://lkml.kernel.org/r/20160617142903.3070388-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

3 files changed, 0 insertions, 25 deletions

diff --git a/fs/compat.c b/fs/compat.c
index 5bc3a4b245bb..bd064a2c3550 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -54,20 +54,6 @@
 #include <asm/ioctls.h>
 #include "internal.h"
 
-int compat_log = 1;
-
-int compat_printk(const char *fmt, ...)
-{
-        va_list ap;
-        int ret;
-        if (!compat_log)
-                return 0;
-        va_start(ap, fmt);
-        ret = vprintk(fmt, ap);
-        va_end(ap);
-        return ret;
-}
-
 /*
  * Not all architectures have sys_utime, so implement this in terms
  * of sys_utimes.
diff --git a/include/linux/compat.h b/include/linux/compat.h
index f964ef79e0ad..63609398ef9f 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -432,7 +432,6 @@ asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
 
 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 
-extern __printf(1, 2) int compat_printk(const char *fmt, ...);
 extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat);
 extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set);
 
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index d66321036f21..98ba312d1088 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -106,7 +106,6 @@ extern unsigned int core_pipe_limit;
 extern int pid_max;
 extern int pid_max_min, pid_max_max;
 extern int percpu_pagelist_fraction;
-extern int compat_log;
 extern int latencytop_enabled;
 extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max;
 #ifndef CONFIG_MMU
@@ -1084,15 +1083,6 @@ static struct ctl_table kern_table[] = {
                 .extra1         = &neg_one,
         },
 #endif
-#ifdef CONFIG_COMPAT
-        {
-                .procname       = "compat-log",
-                .data           = &compat_log,
-                .maxlen         = sizeof (int),
-                .mode           = 0644,
-                .proc_handler   = proc_dointvec,
-        },
-#endif
 #ifdef CONFIG_RT_MUTEXES
         {
                 .procname       = "max_lock_depth",