linux-kernel - Re: [PATCH] drm: Combine identical if/elif code blocks

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Date: Wed, 15 May 2024 11:31:06 +0200
From: Thorsten Blum <thorsten.blum@...lux.com>
To: Luc Ma <onion0709@...il.com>
Cc: David Airlie <airlied@...il.com>,
 Daniel Vetter <daniel@...ll.ch>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>,
 Thomas Zimmermann <tzimmermann@...e.de>,
 dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: Combine identical if/elif code blocks

On 15. May 2024, at 11:22, Thorsten Blum <thorsten.blum@...lux.com> wrote:
> On 15. May 2024, at 09:43, Luc Ma <onion0709@...il.com> wrote:
>> On Tue, 14 May 2024 at 19:37, Thorsten Blum <thorsten.blum@...lux.com> wrote:
>>> 
>>> Merge the identical if/elif code blocks and remove the following two
>>> warnings reported by make includecheck:
>>> 
>>>      asm/ioctl.h is included more than once
>>>      linux/types.h is included more than once
>>> 
>>> Signed-off-by: Thorsten Blum <thorsten.blum@...lux.com>
>>> ---
>>> include/uapi/drm/drm.h | 8 +-------
>>> 1 file changed, 1 insertion(+), 7 deletions(-)
>>> 
>>> diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
>>> index 16122819edfe..315af7b19c97 100644
>>> --- a/include/uapi/drm/drm.h
>>> +++ b/include/uapi/drm/drm.h
>>> @@ -35,13 +35,7 @@
>>> #ifndef _DRM_H_
>>> #define _DRM_H_
>>> 
>>> -#if defined(__KERNEL__)
>>> -
>>> -#include <linux/types.h>
>>> -#include <asm/ioctl.h>
>>> -typedef unsigned int drm_handle_t;
>>> -
>>> -#elif defined(__linux__)
>> 
>> I think it is intentionally like that. Please see
>> https://patchwork.freedesktop.org/patch/78747/
> 
> Thank you for the link.
> 
> Does anyone know if the reason for the change from 2016 ("make
> headers_install can't handle fancy conditions, ...") is still valid?
> 
> Other headers use the same #if directive:
> 
> fs/ext4/ext4.h:948:#if defined(__KERNEL__) || defined(__linux__)
> include/uapi/sound/asound.h:11:#if defined(__KERNEL__) || defined(__linux__)
> 
> And there are many others using similar conditions:
> 
> arch/arm/include/uapi/asm/swab.h:27:#if !defined(__KERNEL__) || __LINUX_ARM_ARCH__ < 6
> arch/sparc/include/uapi/asm/signal.h:92:#if defined(__KERNEL__) || defined(__WANT_POSIX1B_SIGNALS__)
> arch/sparc/include/uapi/asm/termios.h:8:#if defined(__KERNEL__) || defined(__DEFINE_BSD_TERMIOS)
> include/uapi/linux/soundcard.h:1040:#if !defined(__KERNEL__) || defined(USE_SEQ_MACROS)
> include/uapi/linux/stat.h:7:#if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
> include/uapi/sound/asound.h:11:#if defined(__KERNEL__) || defined(__linux__)
> ...
> 
> Thanks,
> Thorsten

Re-sending this to linux-kernel@...r.kernel.org because the mailing list
somehow got lost in Luc's reply.