linux-kernel - Re: [PATCH 1/2] bitmap_parse: support 'all' semantics

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Message-ID: <YH6qUDJmUflEmper@smile.fi.intel.com>
Date:   Tue, 20 Apr 2021 13:17:52 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Yury Norov <yury.norov@...il.com>
Cc:     linux-kernel@...r.kernel.org, rcu@...r.kernel.org,
        linux-doc@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Jonathan Corbet <corbet@....net>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH 1/2] bitmap_parse: support 'all' semantics

On Mon, Apr 19, 2021 at 05:01:30PM -0700, Yury Norov wrote:
> RCU code supports an 'all' group as a special case when parsing
> rcu_nocbs parameter. This patch moves the 'all' support to the core
> bitmap_parse code, so that all bitmap users can enjoy this extension.
> 
> Moving 'all' parsing to a bitmap_parse level, also allows users to
> pass patterns together with 'all' in regular group:pattern format

...

>  	{0, "0-31:1/3,1-31:1/3,2-31:1/3",	&exp1[8 * step], 32, 0},
>  	{0, "1-10:8/12,8-31:24/29,0-31:0/3",	&exp1[9 * step], 32, 0},
>  
> +	{0,	  "all",		&exp1[8 * step], 32, 0},
> +	{0,	  "0, 1, all,  ",	&exp1[8 * step], 32, 0},
> +	{0,	  "all:1/2",		&exp1[4 * step], 32, 0},
> +	{0,	  "ALL:1/2",		&exp1[4 * step], 32, 0},

> +	{-EINVAL, "al", NULL, 8, 0},
> +	{-EINVAL, "alll", NULL, 8, 0},
> +

Looking at the below hunk it seems like the two above should be actually placed
there.

>  	{-EINVAL, "-1",	NULL, 8, 0},
>  	{-EINVAL, "-0",	NULL, 8, 0},
>  	{-EINVAL, "10-1", NULL, 8, 0},
> @@ -384,7 +391,6 @@ static const struct test_bitmap_parselist parselist_tests[] __initconst = {
>  	{-EINVAL, "a-31:10/1", NULL, 8, 0},
>  	{-EINVAL, "0-31:a/1", NULL, 8, 0},
>  	{-EINVAL, "0-\n", NULL, 8, 0},
> -

Otherwise this change doesn't belong to the series.

-- 
With Best Regards,
Andy Shevchenko