linux-kernel - Re: [PATCH] staging: android: ashmem: used const keyword

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Date:   Tue, 28 Jul 2020 11:04:20 -0700
From:   Joe Perches <joe@...ches.com>
To:     Dhiraj Sharma <dhiraj.sharma0024@...il.com>,
        gregkh@...uxfoundation.org, arve@...roid.com, tkjos@...roid.com,
        maco@...roid.com, joel@...lfernandes.org, christian@...uner.io,
        hridya@...gle.com, surenb@...gle.com
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: android: ashmem: used const keyword

On Tue, 2020-07-28 at 23:29 +0530, Dhiraj Sharma wrote:
> I ran checkpatch.pl script which reported a warning to use const keyword
> on line 370.Therefore I made this change.

checkpatch is a brainless script.
Not everything it suggests is appropriate.

> diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c
[]
> @@ -367,7 +367,7 @@ 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;

This can't work.

Please make sure to compile your proposed changes
_before_ you post them.