ntp: use unsigned input for do_div()

The kernel NTP code shouldn't hand 64-bit *signed* values to do_div().  Make it
instead hand 64-bit unsigned values.  This gets rid of a couple of warnings.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 7 insertions, 5 deletions

diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index c88b5910e7ab..d4bca927f715 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -342,14 +342,16 @@ int do_adjtimex(struct timex *txc)
                     freq_adj = shift_right(freq_adj, time_constant * 2 +
                                            (SHIFT_PLL + 2) * 2 - SHIFT_NSEC);
                     if (mtemp >= MINSEC && (time_status & STA_FLL || mtemp > MAXSEC)) {
+                        u64 utemp64;
                         temp64 = time_offset << (SHIFT_NSEC - SHIFT_FLL);
                         if (time_offset < 0) {
-                            temp64 = -temp64;
-                            do_div(temp64, mtemp);
-                            freq_adj -= temp64;
+                            utemp64 = -temp64;
+                            do_div(utemp64, mtemp);
+                            freq_adj -= utemp64;
                         } else {
-                            do_div(temp64, mtemp);
-                            freq_adj += temp64;
+                            utemp64 = temp64;
+                            do_div(utemp64, mtemp);
+                            freq_adj += utemp64;
                         }
                     }
                     freq_adj += time_freq;