linux-kernel - Re: [PATCH 09/11] kasan: add missing annotation for start

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Message-ID: <CACT4Y+b61vEqw6t-deuCyZvDoqg2HTRUdVKi1RBcpen+0k0QDA@mail.gmail.com>
Date:   Mon, 10 Feb 2020 08:27:55 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Jules Irenge <jbi.octave@...il.com>
Cc:     Boqun Feng <boqun.feng@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: Re: [PATCH 09/11] kasan: add missing annotation for start_report()

On Sun, Feb 9, 2020 at 11:48 PM Jules Irenge <jbi.octave@...il.com> wrote:
>
> Sparse reports a warning at start_report()
>
> warning: context imbalance in start_report() - wrong count at exit
>
> The root cause is a missing annotation at start_report()
>
> Add the missing annotation __acquires(&report_lock)
>
> Signed-off-by: Jules Irenge <jbi.octave@...il.com>

Acked-by: Dmitry Vyukov <dvyukov@...gle.com>

> ---
>  mm/kasan/report.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/kasan/report.c b/mm/kasan/report.c
> index 5ef9f24f566b..5451624c4e09 100644
> --- a/mm/kasan/report.c
> +++ b/mm/kasan/report.c
> @@ -77,7 +77,7 @@ static void print_error_description(struct kasan_access_info *info)
>
>  static DEFINE_SPINLOCK(report_lock);
>
> -static void start_report(unsigned long *flags)
> +static void start_report(unsigned long *flags) __acquires(&report_lock)
>  {
>         /*
>          * Make sure we don't end up in loop.
> --
> 2.24.1
>