linux-kernel - Re: [PATCH v3 treewide] headers: separate linux/mod_devicetable.h from linux/platform

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Date:   Sat, 29 Dec 2018 12:32:30 +1100
From:   NeilBrown <neil@...wn.name>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kbuild test robot <lkp@...el.com>
Subject: Re: [PATCH v3 treewide] headers: separate linux/mod_devicetable.h from linux/platform_device.h

On Sat, Jul 07 2018, Greg Kroah-Hartman wrote:

> On Tue, Jun 19, 2018 at 10:47:28PM -0700, Randy Dunlap wrote:
>> From: Randy Dunlap <rdunlap@...radead.org>
>> 
>> At over 4000 #includes, <linux/platform_device.h> is the 9th most
>> #included header file in the Linux kernel.  It does not need
>> <linux/mod_devicetable.h>, so drop that header and explicitly add
>> <linux/mod_devicetable.h> to source files that need it.
>> 
>>    4146 #include <linux/platform_device.h>
>> 
>> After this patch, there are 225 files that use <linux/mod_devicetable.h>,
>> for a reduction of around 3900 times that <linux/mod_devicetable.h>
>> does not have to be read & parsed.
>> 
>>     225 #include <linux/mod_devicetable.h>
>> 
>> This patch was build-tested on 20 different arch-es.
>> 
>> It also makes these drivers SubmitChecklist#1 compliant.
>> 
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Reported-by: kbuild test robot <lkp@...el.com> # drivers/media/platform/vimc/
>> Reported-by: kbuild test robot <lkp@...el.com> # drivers/pinctrl/pinctrl-u300.c
>> ---
>> v3: add fix for drivers/pinctrl/pinctrl-u300.c
>> v2: add fixes for drivers/media/platform/vimc/
>
> I've queued this up now, let's see what else breaks!  :)

Some MIPS watchdog drivers break, at least.

NeilBrown

From: NeilBrown <neil@...wn.name>
Subject: [PATCH] Fix compilation problem for mt7621_wdt.c and rt2880_wdt.c

These files need
   #include <linux/mod_devicetable.h>
to compile correctly.

Fixes: ac3167257b9f ("headers: separate linux/mod_devicetable.h from linux/platform_device.h")
Signed-off-by: NeilBrown <neil@...wn.name>
---
 drivers/watchdog/mt7621_wdt.c | 1 +
 drivers/watchdog/rt2880_wdt.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/watchdog/mt7621_wdt.c b/drivers/watchdog/mt7621_wdt.c
index 5c4a764717c4..81208cd3f4ec 100644
--- a/drivers/watchdog/mt7621_wdt.c
+++ b/drivers/watchdog/mt7621_wdt.c
@@ -17,6 +17,7 @@
 #include <linux/watchdog.h>
 #include <linux/moduleparam.h>
 #include <linux/platform_device.h>
+#include <linux/mod_devicetable.h>
 
 #include <asm/mach-ralink/ralink_regs.h>
 
diff --git a/drivers/watchdog/rt2880_wdt.c b/drivers/watchdog/rt2880_wdt.c
index 98967f0a7d10..db7c57d82cfd 100644
--- a/drivers/watchdog/rt2880_wdt.c
+++ b/drivers/watchdog/rt2880_wdt.c
@@ -18,6 +18,7 @@
 #include <linux/watchdog.h>
 #include <linux/moduleparam.h>
 #include <linux/platform_device.h>
+#include <linux/mod_devicetable.h>
 
 #include <asm/mach-ralink/ralink_regs.h>
 
-- 
2.14.0.rc0.dirty


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