linux-kernel - RE: [PATCH 1/2] add typeof

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Message-ID: <a32bb1376821422fa3c647c01f3f1a95@AcuMS.aculab.com>
Date:   Thu, 30 May 2019 11:37:42 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Alexey Dobriyan' <adobriyan@...il.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] add typeof_member() macro

From: Alexey Dobriyan
> Sent: 29 May 2019 20:07
> 
> Add typeof_member() macro so that types can be exctracted without
> introducing dummy variables.
> 
> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
> ---
> 
>  include/linux/kernel.h |    2 ++
>  1 file changed, 2 insertions(+)
> 
> --- a/include/linux/kernel.h
> +++ b/include/linux/kernel.h
> @@ -88,6 +88,8 @@
>   */
>  #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
> 
> +#define typeof_member(T, m)	typeof(((T*)0)->m)

Should probably be 't' (not 'T') and upper case ?

Hmmm.... the #define is longer that what it expands to ...

	David

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