linux-kernel - Re: [PATCH 3/6] lib/stackdepot: introduce __stack_depot

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Date:   Fri, 10 Sep 2021 16:08:10 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Marco Elver <elver@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Tejun Heo <tj@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Walter Wu <walter-zh.wu@...iatek.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Vijayanand Jitta <vjitta@...eaurora.org>,
        Vinayak Menon <vinmenon@...eaurora.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Aleksandr Nogikh <nogikh@...gle.com>,
        Taras Madan <tarasmadan@...gle.com>
Subject: Re: [PATCH 3/6] lib/stackdepot: introduce __stack_depot_save()

On 2021-09-07 16:13:04 [+0200], Marco Elver wrote:
> diff --git a/lib/stackdepot.c b/lib/stackdepot.c
> index c80a9f734253..cab6cf117290 100644
> --- a/lib/stackdepot.c
> +++ b/lib/stackdepot.c
> @@ -339,6 +350,25 @@ depot_stack_handle_t stack_depot_save(unsigned long *entries,
>  fast_exit:
>  	return retval;
>  }
> +EXPORT_SYMBOL_GPL(__stack_depot_save);
> +
> +/**
> + * stack_depot_save - Save a stack trace from an array
> + *
> + * @entries:		Pointer to storage array
> + * @nr_entries:		Size of the storage array
> + * @alloc_flags:	Allocation gfp flags
> + *
> + * Context: Contexts where allocations via alloc_pages() are allowed.

Could we add here something like (see __stack_depot_save() for details)
since it has more verbose.

Sebastian