From a4a27b06e88cadbbd3bc5a14b50a9ff70646b7d7 Mon Sep 17 00:00:00 2001
From: Thorsten Glaser
Date: Sun, 7 Nov 2010 14:00:04 +0000
Subject: hwclock: [m68k] unbreak FTBFS with recent (>= 2.4.18?) kernels

The old KDGHWCLK ioctl was removed from the Linux kernel quite some
time ago. The kd.c source file of hwclock contains fallback code to
handle this, but the fallback code never could have compiled or was
not fixed along other code changes. The Linux kernel nowadays igno-
res the ioctl entirely so removing it unless provided by the kernel
headers, to keep it working on very old kernels, seems the sensible
thing to do, as the comments say m68k only and deprecated (which is
correct AFAICT).

According to pickaxe on gitweb, it was removed in 2002:
http://git.kernel.org/?p=linux/kernel/git/torvalds/old-2.6-bkcvs.git;a=commit;h=a915e414af5fc541ff62ef0bfec847457ae650bc

Addresses: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=578168
Signed-off-by: Thorsten Glaser <tg@mirbsd.org>
Signed-off-by: Karel Zak <kzak@redhat.com>
---
 AUTHORS      |  1 +
 hwclock/kd.c | 43 ++++++++++++++++++-------------------------
 2 files changed, 19 insertions(+), 25 deletions(-)

diff --git a/AUTHORS b/AUTHORS
index d6a6a62ca..4284620a0 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -210,6 +210,7 @@ CONTRIBUTORS:
       Sven Jost <sven.jost@googlemail.com>
       Theodore Ts'o <tytso@mit.edu>
       Thomas Fehr <fehr@suse.de>
+      Thorsten Glaser <tg@mirbsd.org>
       Tilman Schmidt <tilman@imap.cc>
       Timo Juhani Lindfors <timo.lindfors@iki.fi>
       Tom Prince <tom.prince@ualberta.net>
diff --git a/hwclock/kd.c b/hwclock/kd.c
index 3da87cafd..66ff579bb 100644
--- a/hwclock/kd.c
+++ b/hwclock/kd.c
@@ -2,14 +2,7 @@
 
 #include "clock.h"
 
-#ifndef __m68k__
-
-struct clock_ops *
-probe_for_kd_clock() {
-	return NULL;
-}
-
-#else /* __m68k__ */
+#ifdef __m68k__
 
 #include <unistd.h>		/* for close() */
 #include <fcntl.h>		/* for O_RDONLY */
@@ -19,26 +12,26 @@ probe_for_kd_clock() {
 #include "nls.h"
 #include "usleep.h"
 
-static int con_fd = -1;		/* opened by probe_for_kd_clock() */
-				/* never closed */
-static char *con_fd_filename;	/* usually "/dev/tty1" */
-
 /* Get defines for KDGHWCLK and KDSHWCLK (m68k) */
 #include <linux/kd.h>
-#ifndef KDGHWCLK
-#define KDGHWCLK        0x4B50     /* get hardware clock */
-#define KDSHWCLK        0x4B51     /* set hardware clock */
-struct hwclk_time {
-        unsigned        sec;    /* 0..59 */
-        unsigned        min;    /* 0..59 */
-        unsigned        hour;   /* 0..23 */
-        unsigned        day;    /* 1..31 */
-        unsigned        mon;    /* 0..11 */
-        unsigned        year;   /* 70... */
-        int             wday;   /* 0..6, 0 is Sunday, -1 means unknown/don't set */
-};
+
+/* Even on m68k, if KDGHWCLK (antique) is not defined, don't build this */
+
 #endif
 
+#if !defined(__m68k__) || !defined(KDGHWCLK)
+
+struct clock_ops *
+probe_for_kd_clock() {
+	return NULL;
+}
+
+#else /* __m68k__ && KDGHWCLK */
+
+static int con_fd = -1;		/* opened by probe_for_kd_clock() */
+				/* never closed */
+static char *con_fd_filename;	/* usually "/dev/tty1" */
+
 static int
 synchronize_to_clock_tick_kd(void) {
 /*----------------------------------------------------------------------------
@@ -183,4 +176,4 @@ probe_for_kd_clock() {
 	}
 	return ret;
 }
-#endif /* __m68k__ */
+#endif /* __m68k__ && KDGHWCLK */
-- 
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