[PATCH] staging: android: ashmem: used const keyword

[PATCH] staging: android: ashmem: used const keyword

[Dhiraj Sharma]

I ran checkpatch.pl script which reported a warning to use const keyword
on line 370.Therefore I made this change.

Signed-off-by: Dhiraj Sharma <dhiraj.sharma0024@gmail.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 c05a214191da..f9cfa15b785f 100644
--- 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;
 	struct ashmem_area *asma = file->private_data;
 	int ret = 0;

--
2.17.1

Re: [PATCH] staging: android: ashmem: used const keyword

[Joe Perches]

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.

Re: [PATCH] staging: android: ashmem: used const keyword

[Greg KH]

On Tue, Jul 28, 2020 at 11:29:35PM +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.
> 
> Signed-off-by: Dhiraj Sharma <dhiraj.sharma0024@gmail.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 c05a214191da..f9cfa15b785f 100644
> --- 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;

You have now submitted two patches that you obviously never even built,
which is the first step in kernel development :(

Please be more careful next time.

greg k-h

Re: [PATCH] staging: android: ashmem: used const keyword

[Dhiraj Sharma]

Alright, I have understood now that I should not trust on
checkpatch.pl script fully but partially it is indeed helpful. Please
don't criticize this script, it was my fault instead.

Before submitting code changes I would test them all, sorry for
wasting your time please ignore this patch changes now.

I will not commit such foolish mistakes now.


Thank you
Dhiraj Sharma

On Tue, Jul 28, 2020 at 11:55 PM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Tue, Jul 28, 2020 at 11:29:35PM +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.
> >
> > Signed-off-by: Dhiraj Sharma <dhiraj.sharma0024@gmail.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 c05a214191da..f9cfa15b785f 100644
> > --- 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;
>
> You have now submitted two patches that you obviously never even built,
> which is the first step in kernel development :(
>
> Please be more careful next time.
>
> greg k-h