Re: [PATCH] mm: page_alloc: remove unneeded header files

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On 2023/5/31 6:13, Andrew Morton wrote:
> On Sat, 27 May 2023 18:07:28 +0800 Miaohe Lin <linmiaohe@xxxxxxxxxx> wrote:
> 
>> Remove some unneeded header files. No functional change intended.
>>
>> Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
>> ---
>>  mm/page_alloc.c | 6 ------
>>  1 file changed, 6 deletions(-)
>>
>> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
>> index e671c747892f..beb6db613238 100644
>> --- a/mm/page_alloc.c
>> +++ b/mm/page_alloc.c
>> @@ -24,9 +24,7 @@
>>  #include <linux/kernel.h>
>>  #include <linux/kasan.h>
>>  #include <linux/kmsan.h>
>> -#include <linux/module.h>
> 
> This contains the prototype for print_modules().  So we're now reliant
> upon module.h being included via some other header, which is fragile.

Will keep it.

> 
>>  #include <linux/suspend.h>
>> -#include <linux/pagevec.h>
>>  #include <linux/ratelimit.h>
>>  #include <linux/oom.h>
>>  #include <linux/topology.h>
>> @@ -36,8 +34,6 @@
>>  #include <linux/memory_hotplug.h>
>>  #include <linux/nodemask.h>
>>  #include <linux/vmstat.h>
>> -#include <linux/sort.h>
>> -#include <linux/pfn.h>
>>  #include <linux/fault-inject.h>
>>  #include <linux/compaction.h>
>>  #include <trace/events/kmem.h>
>> @@ -52,11 +48,9 @@
>>  #include <linux/memcontrol.h>
>>  #include <linux/ftrace.h>
>>  #include <linux/lockdep.h>
>> -#include <linux/nmi.h>
>>  #include <linux/psi.h>
>>  #include <linux/khugepaged.h>
>>  #include <linux/delayacct.h>
>> -#include <asm/div64.h>
> 
> Needed for do_div()?

Will add it back. Depending on "asm/div64.h" being included via some other headers is fragile too.
Many thanks for your comment.




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