lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <02874ECE860811409154E81DA85FBB5892325527@ORSMSX121.amr.corp.intel.com>
Date:   Tue, 12 Mar 2019 23:07:49 +0000
From:   "Keller, Jacob E" <jacob.e.keller@...el.com>
To:     Paul Thomas <pthomas8589@...il.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH] Check for SKBTX_HW_TSTAMP in macb driver



> -----Original Message-----
> From: Paul Thomas [mailto:pthomas8589@...il.com]
> Sent: Tuesday, March 12, 2019 3:05 PM
> To: Keller, Jacob E <jacob.e.keller@...el.com>
> Cc: netdev@...r.kernel.org
> Subject: Re: [PATCH] Check for SKBTX_HW_TSTAMP in macb driver
> 
> Hi Jake, thanks for all the help and for looking at this!
> 
> >
> > You have two conditionals inside, and I misread where you were doing the checking
> of the SKBTX_HW_TSTAMP flag.
> >
> > I would do the following :
> >
> > if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HWTSTAMP) &&
> >     gem_ptp_do_txstamp(queue, skb, desc)) {
> I guess I was thinking the call to gem_ptp_do_txstamp() could be
> avoided in many cases, but either way is fine with me..

The call will be avoided by virtue of short-curcuit boolean AND. If the first check is false, then the entire section is skipped without evaluating the second condition.

Thanks,
Jake

> >   ....
> > }
> >
> -Paul

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ