netdev - Re: [PATCH 1/2] linux/kernel.h: add yesno(), onoff(), enableddisabled(), plural() helpers

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Date:   Wed, 4 Sep 2019 09:05:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Jani Nikula <jani.nikula@...el.com>
Cc:     linux-kernel@...r.kernel.org,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        intel-gfx@...ts.freedesktop.org,
        Vishal Kulkarni <vishal@...lsio.com>, netdev@...r.kernel.org,
        linux-usb@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH 1/2] linux/kernel.h: add yesno(), onoff(),
 enableddisabled(), plural() helpers

On Tue, Sep 03, 2019 at 04:37:30PM +0300, Jani Nikula wrote:
> The kernel has plenty of ternary operators to choose between constant
> strings, such as condition ? "yes" : "no", as well as value == 1 ? "" :
> "s":
> 
> $ git grep '? "yes" : "no"' | wc -l
> 258
> $ git grep '? "on" : "off"' | wc -l
> 204
> $ git grep '? "enabled" : "disabled"' | wc -l
> 196
> $ git grep '? "" : "s"' | wc -l
> 25
> 
> Additionally, there are some occurences of the same in reverse order,
> split to multiple lines, or otherwise not caught by the simple grep.
> 
> Add helpers to return the constant strings. Remove existing equivalent
> and conflicting functions in i915, cxgb4, and USB core. Further
> conversion can be done incrementally.
> 
> While the main goal here is to abstract recurring patterns, and slightly
> clean up the code base by not open coding the ternary operators, there
> are also some space savings to be had via better string constant
> pooling.
> 
> Cc: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
> Cc: intel-gfx@...ts.freedesktop.org
> Cc: Vishal Kulkarni <vishal@...lsio.com>
> Cc: netdev@...r.kernel.org
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: linux-usb@...r.kernel.org
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: linux-kernel@...r.kernel.org
> Cc: Julia Lawall <julia.lawall@...6.fr>
> Signed-off-by: Jani Nikula <jani.nikula@...el.com>
> ---
>  drivers/gpu/drm/i915/i915_utils.h             | 15 -------------
>  .../ethernet/chelsio/cxgb4/cxgb4_debugfs.c    | 11 ----------
>  drivers/usb/core/config.c                     |  5 -----
>  drivers/usb/core/generic.c                    |  5 -----
>  include/linux/kernel.h                        | 21 +++++++++++++++++++
>  5 files changed, 21 insertions(+), 36 deletions(-)

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