sysctl: sparc Use the compat_sys_sysctl

Now that we have a generic 32bit compatibility implementation
there is no need for sparc to implement it's own.
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

arch/sparc/kernel/sys_sparc32.c

@@ -591,63 +591,6 @@ asmlinkage unsigned long sys32_mremap(unsigned long addr,
 	return ret;       
 }
 
-struct __sysctl_args32 {
-	u32 name;
-	int nlen;
-	u32 oldval;
-	u32 oldlenp;
-	u32 newval;
-	u32 newlen;
-	u32 __unused[4];
-};
-
-asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
-{
-#ifndef CONFIG_SYSCTL_SYSCALL
-	return -ENOSYS;
-#else
-	struct __sysctl_args32 tmp;
-	int error;
-	size_t oldlen, __user *oldlenp = NULL;
-	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
-
-	if (copy_from_user(&tmp, args, sizeof(tmp)))
-		return -EFAULT;
-
-	if (tmp.oldval && tmp.oldlenp) {
-		/* Duh, this is ugly and might not work if sysctl_args
-		   is in read-only memory, but do_sysctl does indirectly
-		   a lot of uaccess in both directions and we'd have to
-		   basically copy the whole sysctl.c here, and
-		   glibc's __sysctl uses rw memory for the structure
-		   anyway.  */
-		if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
-		    put_user(oldlen, (size_t __user *)addr))
-			return -EFAULT;
-		oldlenp = (size_t __user *)addr;
-	}
-
-	lock_kernel();
-	error = do_sysctl((int __user *)(unsigned long) tmp.name,
-			  tmp.nlen,
-			  (void __user *)(unsigned long) tmp.oldval,
-			  oldlenp,
-			  (void __user *)(unsigned long) tmp.newval,
-			  tmp.newlen);
-	unlock_kernel();
-	if (oldlenp) {
-		if (!error) {
-			if (get_user(oldlen, (size_t __user *)addr) ||
-			    put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
-				error = -EFAULT;
-		}
-		if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
-			error = -EFAULT;
-	}
-	return error;
-#endif
-}
-
 long sys32_lookup_dcookie(unsigned long cookie_high,
 			  unsigned long cookie_low,
 			  char __user *buf, size_t len)

arch/sparc/kernel/systbls_64.S

@@ -68,7 +68,7 @@ sys_call_table32:
 	.word compat_sys_fstatfs64, sys_llseek, sys_mlock, sys_munlock, sys32_mlockall
 /*240*/	.word sys_munlockall, sys32_sched_setparam, sys32_sched_getparam, sys32_sched_setscheduler, sys32_sched_getscheduler
 	.word sys_sched_yield, sys32_sched_get_priority_max, sys32_sched_get_priority_min, sys32_sched_rr_get_interval, compat_sys_nanosleep
-/*250*/	.word sys32_mremap, sys32_sysctl, sys32_getsid, sys_fdatasync, sys32_nfsservctl
+/*250*/	.word sys32_mremap, compat_sys_sysctl, sys32_getsid, sys_fdatasync, sys32_nfsservctl
 	.word sys32_sync_file_range, compat_sys_clock_settime, compat_sys_clock_gettime, compat_sys_clock_getres, sys32_clock_nanosleep
 /*260*/	.word compat_sys_sched_getaffinity, compat_sys_sched_setaffinity, sys32_timer_settime, compat_sys_timer_gettime, sys_timer_getoverrun
 	.word sys_timer_delete, compat_sys_timer_create, sys_ni_syscall, compat_sys_io_setup, sys_io_destroy