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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>
This commit is contained in:
Thorsten Glaser 2010-11-07 14:00:04 +00:00 committed by Karel Zak
parent 37f243ed57
commit a4a27b06e8
2 changed files with 19 additions and 25 deletions
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1
AUTHORS
View File

@ -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>

43
hwclock/kd.c
View File

@ -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"
/* Get defines for KDGHWCLK and KDSHWCLK (m68k) */
#include <linux/kd.h>
/* 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" */
/* 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 */
};
#endif
static int
synchronize_to_clock_tick_kd(void) {
/*----------------------------------------------------------------------------
@ -183,4 +176,4 @@ probe_for_kd_clock() {
}
return ret;
}
#endif /* __m68k__ */
#endif /* __m68k__ && KDGHWCLK */