Linux-USB Archive on lore.kernel.org
 help / color / Atom feed
From: Andrey Konovalov <andreyknvl@google.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Dmitry Vyukov <dvyukov@google.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	USB list <linux-usb@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Alan Stern <stern@rowland.harvard.edu>,
	Shuah Khan <shuah@kernel.org>,
	Alexander Potapenko <glider@google.com>,
	Marco Elver <elver@google.com>,
	Aleksandr Nogikh <nogikh@google.com>,
	Nazime Hande Harputluoglu <handeharput@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH v4] kcov, usb: only collect coverage from __usb_hcd_giveback_urb in softirq
Date: Fri, 13 Nov 2020 13:51:19 +0100
Message-ID: <CAAeHK+zd0ucaj8EJ8ro+0ekubrxp5GiBMaBULHJB05dDrzpQGw@mail.gmail.com> (raw)
In-Reply-To: <20201113123035.tjllvijjzd54npsf@linutronix.de>

On Fri, Nov 13, 2020 at 1:30 PM Sebastian Andrzej Siewior
<bigeasy@linutronix.de> wrote:
>
> On 2020-10-16 15:57:45 [+0200], Andrey Konovalov wrote:
> > --- a/drivers/usb/core/hcd.c
> > +++ b/drivers/usb/core/hcd.c
> > @@ -1646,9 +1646,16 @@ static void __usb_hcd_giveback_urb(struct urb *urb)
> >
> >       /* pass ownership to the completion handler */
> >       urb->status = status;
> > -     kcov_remote_start_usb((u64)urb->dev->bus->busnum);
> > +     /*
> > +      * This function can be called in task context inside another remote
> > +      * coverage collection section, but KCOV doesn't support that kind of
> > +      * recursion yet. Only collect coverage in softirq context for now.
> > +      */
> > +     if (in_serving_softirq())
>
> Could this in_serving_softirq() usage be replaced, please?

Hi Sebastian,

Replaced with what and why?

Thanks!

  reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-16 13:57 Andrey Konovalov
2020-10-16 14:33 ` Dmitry Vyukov
2020-11-13 12:30 ` Sebastian Andrzej Siewior
2020-11-13 12:51   ` Andrey Konovalov [this message]
2020-11-13 13:28     ` Sebastian Andrzej Siewior
2020-11-13 13:42       ` Andrey Konovalov
2020-11-13 15:32         ` Greg Kroah-Hartman
2020-11-13 15:47         ` Marco Elver
2020-11-23 23:42           ` Andrey Konovalov

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=CAAeHK+zd0ucaj8EJ8ro+0ekubrxp5GiBMaBULHJB05dDrzpQGw@mail.gmail.com \
    --to=andreyknvl@google.com \
    --cc=akpm@linux-foundation.org \
    --cc=bigeasy@linutronix.de \
    --cc=dvyukov@google.com \
    --cc=elver@google.com \
    --cc=glider@google.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=handeharput@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=nogikh@google.com \
    --cc=shuah@kernel.org \
    --cc=stern@rowland.harvard.edu \
    --cc=tglx@linutronix.de \
    /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

Linux-USB Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-usb/0 linux-usb/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-usb linux-usb/ https://lore.kernel.org/linux-usb \
		linux-usb@vger.kernel.org
	public-inbox-index linux-usb

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-usb


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git