linux-kernel - Re: [PATCH] staging: android: ashmem: Declared file operation with 'const' keyword

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Date:   Wed, 19 May 2021 15:00:08 +0530
From:   Hriday Hegde <hridayhegde1999@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <christian@...uner.io>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev
Subject: Re: [PATCH] staging: android: ashmem: Declared file operation with
 'const' keyword

I am not really sure how to do that and how to reflect it in the patch i followed what was taught in the Beginners course and it does not mention building. I know i need to test it out but is running 'patch -p1 < x.patch what i need to do?

On 19-05-2021 14:01, Greg Kroah-Hartman wrote:
> On Wed, May 19, 2021 at 01:19:58AM -0700, Hriday Hegde wrote:
>> Fixing following warnings found by checkpatch.pl
>> WARNING: struct file_operations should normally be const
>> 380: FILE: drivers/staging/android/ashmem.c:380:
>> +	static struct file_operations vmfile_fops;
>>
>> Signed-off-by: Hriday Hegde <hridayhegde1999@...il.com>
>> ---
>>  drivers/staging/android/ashmem.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c
>> index 8ee4320a5dc6..8ff2794b08e3 100644
>> --- a/drivers/staging/android/ashmem.c
>> +++ b/drivers/staging/android/ashmem.c
>> @@ -377,7 +377,7 @@ ashmem_vmfile_get_unmapped_area(struct file *file, unsigned long addr,
>>  
>>  static int ashmem_mmap(struct file *file, struct vm_area_struct *vma)
>>  {
>> -	static struct file_operations vmfile_fops;
>> +	static const struct file_operations vmfile_fops;
>>  	struct ashmem_area *asma = file->private_data;
>>  	int ret = 0;
>>  
>> -- 
>> 2.25.1
>>
>>
> Any reason why you didn't build your change before submitting this
> patch?
>
> thanks,
>
> greg k-h