mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: David Howells <dhowells@redhat.com>
To: torvalds@osdl.org, akpm@linux-foundation.org, zippel@linux-m68k.org
Cc: linux-kernel@vger.kernel.org, dhowells@redhat.com
Subject: [PATCH] Make the kernel NTP code hand 64-bit *unsigned* values to do_div()
Date: Thu, 21 Feb 2008 15:54:02 +0000	[thread overview]
Message-ID: <20080221155402.4414.60360.stgit@warthog.procyon.org.uk> (raw)

From: David Howells <dhowells@redhat.com>

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>
---

 kernel/time/ntp.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)


diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index c88b591..3bead00 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -342,13 +342,15 @@ 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);
+			    utemp64 = -temp64;
+			    do_div(utemp64, mtemp);
 			    freq_adj -= temp64;
 			} else {
-			    do_div(temp64, mtemp);
+			    utemp64 = temp64;
+			    do_div(utemp64, mtemp);
 			    freq_adj += temp64;
 			}
 		    }


             reply	other threads:[~2008-02-21 16:02 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-21 15:54 David Howells [this message]
2008-02-21 16:38 ` Andreas Schwab
2008-02-21 16:46 ` David Howells
2008-02-26  1:55 ` Roman Zippel
2008-02-26  2:01 ` David Howells

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20080221155402.4414.60360.stgit@warthog.procyon.org.uk \
    --to=dhowells@redhat.com \
    --cc=akpm@linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=torvalds@osdl.org \
    --cc=zippel@linux-m68k.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox

all inboxes | Powered by JetHome®