[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, 2 insertions, 14 deletions

diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index e19b1bad9bc5..edb6cc665f56 100644
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -765,8 +765,6 @@ static __inline__ unsigned long do_gettimeoffset(void)
         return count;
 }
 
-extern unsigned long wall_jiffies;
-
 static void pci_do_gettimeofday(struct timeval *tv)
 {
         unsigned long flags;
@@ -775,26 +773,17 @@ static void pci_do_gettimeofday(struct timeval *tv)
         unsigned long max_ntp_tick = tick_usec - tickadj;
 
         do {
-                unsigned long lost;
-
                 seq = read_seqbegin_irqsave(&xtime_lock, flags);
                 usec = do_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));
@@ -819,8 +808,7 @@ static int pci_do_settimeofday(struct timespec *tv)
          * wall time.  Discover what correction gettimeofday() would have
          * made, and then undo it!
          */
-        tv->tv_nsec -= 1000 * (do_gettimeoffset() + 
-                                (jiffies - wall_jiffies) * (USEC_PER_SEC / HZ));
+        tv->tv_nsec -= 1000 * do_gettimeoffset();
         while (tv->tv_nsec < 0) {
                 tv->tv_nsec += NSEC_PER_SEC;
                 tv->tv_sec--;