[PATCH] kill wall_jiffies

With 2.6.18-rc4-mm2, now wall_jiffies will always be the same as jiffies.
So we can kill wall_jiffies completely.

This is just a cleanup and logically should not change any real behavior
except for one thing: RTC updating code in (old) ppc and xtensa use a
condition "jiffies - wall_jiffies == 1".  This condition is never met so I
suppose it is just a bug.  I just remove that condition only instead of
kill the whole "if" block.

[heiko.carstens@de.ibm.com: s390 build fix and cleanup]
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Andi Kleen <ak@muc.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ian Molton <spyro@f2s.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Hirokazu Takata <takata.hirokazu@renesas.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
Cc: Richard Curnow <rc@rc0.org.uk>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
Cc: Chris Zankel <chris@zankel.net>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 13 deletions

diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index 1072e4946a4a..6cfc984380d9 100644
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -96,31 +96,23 @@ void time_init(void)
 void do_gettimeofday(struct timeval *tv)
 {
         unsigned long flags;
-        extern unsigned long wall_jiffies;
         unsigned long seq;
-        unsigned long usec, sec, lost;
+        unsigned long usec, sec;
         unsigned long max_ntp_tick = tick_usec - tickadj;
 
         do {
                 seq = read_seqbegin_irqsave(&xtime_lock, flags);
 
                 usec = mach_gettimeoffset();
-                lost = jiffies - wall_jiffies;
 
                 /*
                  * If time_adjust is negative then NTP is slowing the clock
                  * so make sure not to go into next possible interval.
                  * Better to lose some accuracy than have time go backwards..
                  */
-                if (unlikely(time_adjust < 0)) {
+                if (unlikely(time_adjust < 0))
                         usec = min(usec, max_ntp_tick);
 
-                        if (lost)
-                                usec += lost * max_ntp_tick;
-                }
-                else if (unlikely(lost))
-                        usec += lost * tick_usec;
-
                 sec = xtime.tv_sec;
                 usec += xtime.tv_nsec/1000;
         } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
@@ -141,7 +133,6 @@ int do_settimeofday(struct timespec *tv)
 {
         time_t wtm_sec, sec = tv->tv_sec;
         long wtm_nsec, nsec = tv->tv_nsec;
-        extern unsigned long wall_jiffies;
 
         if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
                 return -EINVAL;
@@ -153,8 +144,7 @@ int do_settimeofday(struct timespec *tv)
          * Discover what correction gettimeofday
          * would have done, and then undo it!
          */
-        nsec -= 1000 * (mach_gettimeoffset() +
-                        (jiffies - wall_jiffies) * (1000000 / HZ));
+        nsec -= 1000 * mach_gettimeoffset();
 
         wtm_sec  = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
         wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);