linux-kernel - Re: [PATCH v3 2/3] usb, kcov: collect coverage from hub

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Message-ID: <20191107101907.GA1365996@kroah.com>
Date:   Thu, 7 Nov 2019 11:19:07 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     linux-usb@...r.kernel.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Dmitry Vyukov <dvyukov@...gle.com>,
        Alan Stern <stern@...land.harvard.edu>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        David Windsor <dwindsor@...il.com>,
        Elena Reshetova <elena.reshetova@...el.com>,
        Anders Roxell <anders.roxell@...aro.org>,
        Alexander Potapenko <glider@...gle.com>,
        Marco Elver <elver@...gle.com>
Subject: Re: [PATCH v3 2/3] usb, kcov: collect coverage from hub_event

On Tue, Oct 29, 2019 at 05:32:28PM +0100, Andrey Konovalov wrote:
> This patch adds kcov_remote_start()/kcov_remote_stop() annotations to the
> hub_event() function, which is responsible for processing events on USB
> buses, in particular events that happen during USB device enumeration.
> Since hub_event() is run in a global background kernel thread (see
> Documentation/dev-tools/kcov.rst for details), each USB bus gets a unique
> global handle from the USB subsystem kcov handle range. As the result kcov
> can now be used to collect coverage from events that happen on a
> particular USB bus.
> 
> Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
> ---
>  drivers/usb/core/hub.c | 5 +++++
>  1 file changed, 5 insertions(+)

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>