[PATCH 00/18] use ARRAY_SIZE macro

[PATCH 00/18] use ARRAY_SIZE macro

[Jérémy Lefaure]

Hi everyone,
Using ARRAY_SIZE improves the code readability. I used coccinelle (I
made a change to the array_size.cocci file [1]) to find several places
where ARRAY_SIZE could be used instead of other macros or sizeof
division.

I tried to divide the changes into a patch per subsystem (excepted for
staging). If one of the patch should be split into several patches, let
me know.

In order to reduce the size of the To: and Cc: lines, each patch of the
series is sent only to the maintainers and lists concerned by the patch.
This cover letter is sent to every list concerned by this series.

This series is based on linux-next next-20170929. Each patch has been
tested by building the relevant files with W=1.

This series contains the following patches:
[PATCH 01/18] sound: use ARRAY_SIZE
[PATCH 02/18] tracing/filter: use ARRAY_SIZE
[PATCH 03/18] media: use ARRAY_SIZE
[PATCH 04/18] IB/mlx5: Use ARRAY_SIZE
[PATCH 05/18] net: use ARRAY_SIZE
[PATCH 06/18] drm: use ARRAY_SIZE
[PATCH 07/18] scsi: bfa: use ARRAY_SIZE
[PATCH 08/18] ecryptfs: use ARRAY_SIZE
[PATCH 09/18] nfsd: use ARRAY_SIZE
[PATCH 10/18] orangefs: use ARRAY_SIZE
[PATCH 11/18] dm space map metadata: use ARRAY_SIZE
[PATCH 12/18] x86: use ARRAY_SIZE
[PATCH 13/18] tpm: use ARRAY_SIZE
[PATCH 14/18] ipmi: use ARRAY_SIZE
[PATCH 15/18] acpi: use ARRAY_SIZE
[PATCH 16/18] media: staging: atomisp: use ARRAY_SIZE
[PATCH 17/18] staging: rtl8723bs: use ARRAY_SIZE
[PATCH 18/18] staging: rtlwifi: use ARRAY_SIZE


[1]: https://lkml.org/lkml/2017/9/13/689

[PATCH 13/18] tpm: use ARRAY_SIZE

[Jérémy Lefaure]

Using the ARRAY_SIZE macro improves the readability of the code.

Found with Coccinelle with the following semantic patch:
@r depends on (org || report)@
type T;
T[] E;
position p;
@@
(
 (sizeof(E)@p /sizeof(*E))
|
 (sizeof(E)@p /sizeof(E[...]))
|
 (sizeof(E)@p /sizeof(T))
)

Signed-off-by: Jeremy Lefaure <jeremy.lefaure@lse.epita.fr>
---
 drivers/char/tpm/tpm_tis.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index ebd0e75a3e4d..e2d1055fb814 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -30,6 +30,7 @@
 #include <linux/freezer.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/kernel.h>
 #include "tpm.h"
 #include "tpm_tis_core.h"
 
@@ -365,7 +366,7 @@ static struct pnp_driver tis_pnp_driver = {
 	},
 };
 
-#define TIS_HID_USR_IDX sizeof(tpm_pnp_tbl)/sizeof(struct pnp_device_id) -2
+#define TIS_HID_USR_IDX (ARRAY_SIZE(tpm_pnp_tbl) - 2)
 module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
 		    sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
 MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
-- 
2.14.1

Re: [PATCH 13/18] tpm: use ARRAY_SIZE

[Jarkko Sakkinen]

On Sun, Oct 01, 2017 at 03:30:51PM -0400, Jeremy Lefaure wrote:
> Using the ARRAY_SIZE macro improves the readability of the code.
> 
> Found with Coccinelle with the following semantic patch:
> @r depends on (org || report)@
> type T;
> T[] E;
> position p;
> @@
> (
>  (sizeof(E)@p /sizeof(*E))
> |
>  (sizeof(E)@p /sizeof(E[...]))
> |
>  (sizeof(E)@p /sizeof(T))
> )
> 
> Signed-off-by: Jeremy Lefaure <jeremy.lefaure@lse.epita.fr>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

/Jarkko

> ---
>  drivers/char/tpm/tpm_tis.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index ebd0e75a3e4d..e2d1055fb814 100644
> --- a/drivers/char/tpm/tpm_tis.c
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -30,6 +30,7 @@
>  #include <linux/freezer.h>
>  #include <linux/of.h>
>  #include <linux/of_device.h>
> +#include <linux/kernel.h>
>  #include "tpm.h"
>  #include "tpm_tis_core.h"
>  
> @@ -365,7 +366,7 @@ static struct pnp_driver tis_pnp_driver = {
>  	},
>  };
>  
> -#define TIS_HID_USR_IDX sizeof(tpm_pnp_tbl)/sizeof(struct pnp_device_id) -2
> +#define TIS_HID_USR_IDX (ARRAY_SIZE(tpm_pnp_tbl) - 2)
>  module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
>  		    sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
>  MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
> -- 
> 2.14.1
> 

Re: [PATCH 13/18] tpm: use ARRAY_SIZE

[Jérémy Lefaure]

On Wed, 4 Oct 2017 15:14:49 +0300
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> wrote:

> On Sun, Oct 01, 2017 at 03:30:51PM -0400, Jeremy Lefaure wrote:
> > Using the ARRAY_SIZE macro improves the readability of the code.
> > 
> > Found with Coccinelle with the following semantic patch:
> > @r depends on (org || report)@
> > type T;
> > T[] E;
> > position p;
> > @@
> > (
> >  (sizeof(E)@p /sizeof(*E))
> > |
> >  (sizeof(E)@p /sizeof(E[...]))
> > |
> >  (sizeof(E)@p /sizeof(T))
> > )
> > 
> > Signed-off-by: Jeremy Lefaure <jeremy.lefaure@lse.epita.fr>  
> 
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> 
Hi Jarkko,
This patch is an individual patch, it's not really part of a series
(my fault, sorry).

Could you apply this patch to your tree ?

Thank you,
Jeremy

Re: [PATCH 13/18] tpm: use ARRAY_SIZE

[Jarkko Sakkinen]

On Tue, Oct 10, 2017 at 04:30:11PM -0400, Jeremy Lefaure wrote:
> On Wed, 4 Oct 2017 15:14:49 +0300
> Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> wrote:
> 
> > On Sun, Oct 01, 2017 at 03:30:51PM -0400, Jeremy Lefaure wrote:
> > > Using the ARRAY_SIZE macro improves the readability of the code.
> > > 
> > > Found with Coccinelle with the following semantic patch:
> > > @r depends on (org || report)@
> > > type T;
> > > T[] E;
> > > position p;
> > > @@
> > > (
> > >  (sizeof(E)@p /sizeof(*E))
> > > |
> > >  (sizeof(E)@p /sizeof(E[...]))
> > > |
> > >  (sizeof(E)@p /sizeof(T))
> > > )
> > > 
> > > Signed-off-by: Jeremy Lefaure <jeremy.lefaure@lse.epita.fr>  
> > 
> > Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> > 
> Hi Jarkko,
> This patch is an individual patch, it's not really part of a series
> (my fault, sorry).
> 
> Could you apply this patch to your tree ?
> 
> Thank you,
> Jeremy

It is already applied :-)

I'll take it as part of my next pull request. Thank you.

/JarkkO

Re: [PATCH 00/18] use ARRAY_SIZE macro

[Tobin C. Harding]

On Sun, Oct 01, 2017 at 03:30:38PM -0400, Jeremy Lefaure wrote:
> Hi everyone,
> Using ARRAY_SIZE improves the code readability. I used coccinelle (I
> made a change to the array_size.cocci file [1]) to find several places
> where ARRAY_SIZE could be used instead of other macros or sizeof
> division.
> 
> I tried to divide the changes into a patch per subsystem (excepted for
> staging). If one of the patch should be split into several patches, let
> me know.
> 
> In order to reduce the size of the To: and Cc: lines, each patch of the
> series is sent only to the maintainers and lists concerned by the patch.
> This cover letter is sent to every list concerned by this series.

Why don't you just send individual patches for each subsystem? I'm not a maintainer but I don't see
how any one person is going to be able to apply this whole series, it is making it hard for
maintainers if they have to pick patches out from among the series (if indeed any will bother
doing that).

I get that this will be more work for you but AFAIK we are optimizing for maintainers.

Good luck,
Tobin.

Re: [PATCH 00/18] use ARRAY_SIZE macro

[Jérémy Lefaure]

On Mon, 2 Oct 2017 09:01:31 +1100
"Tobin C. Harding" <me@tobin.cc> wrote:

> > In order to reduce the size of the To: and Cc: lines, each patch of the
> > series is sent only to the maintainers and lists concerned by the patch.
> > This cover letter is sent to every list concerned by this series.  
> 
> Why don't you just send individual patches for each subsystem? I'm not a maintainer but I don't see
> how any one person is going to be able to apply this whole series, it is making it hard for
> maintainers if they have to pick patches out from among the series (if indeed any will bother
> doing that).
Yeah, maybe it would have been better to send individual patches.

>From my point of view it's a series because the patches are related (I
did a git format-patch from my local branch). But for the maintainers
point of view, they are individual patches.

As each patch in this series is standalone, the maintainers can pick
the patches they want and apply them individually. So yeah, maybe I
should have sent individual patches. But I also wanted to tie all
patches together as it's the same change.

Anyway, I can tell to each maintainer that they can apply the patches
they're concerned about and next time I may send individual patches.

Thank you for your answer,
Jeremy

Re: [PATCH 00/18] use ARRAY_SIZE macro

[Greg KH]

On Sun, Oct 01, 2017 at 08:52:20PM -0400, Jeremy Lefaure wrote:
> On Mon, 2 Oct 2017 09:01:31 +1100
> "Tobin C. Harding" <me@tobin.cc> wrote:
> 
> > > In order to reduce the size of the To: and Cc: lines, each patch of the
> > > series is sent only to the maintainers and lists concerned by the patch.
> > > This cover letter is sent to every list concerned by this series.  
> > 
> > Why don't you just send individual patches for each subsystem? I'm not a maintainer but I don't see
> > how any one person is going to be able to apply this whole series, it is making it hard for
> > maintainers if they have to pick patches out from among the series (if indeed any will bother
> > doing that).
> Yeah, maybe it would have been better to send individual patches.
> 
> From my point of view it's a series because the patches are related (I
> did a git format-patch from my local branch). But for the maintainers
> point of view, they are individual patches.

And the maintainers view is what matters here, if you wish to get your
patches reviewed and accepted...

thanks,

greg k-h

Re: [PATCH 00/18] use ARRAY_SIZE macro

[J. Bruce Fields]

On Mon, Oct 02, 2017 at 07:35:54AM +0200, Greg KH wrote:
> On Sun, Oct 01, 2017 at 08:52:20PM -0400, Jeremy Lefaure wrote:
> > On Mon, 2 Oct 2017 09:01:31 +1100
> > "Tobin C. Harding" <me@tobin.cc> wrote:
> > 
> > > > In order to reduce the size of the To: and Cc: lines, each patch of the
> > > > series is sent only to the maintainers and lists concerned by the patch.
> > > > This cover letter is sent to every list concerned by this series.  
> > > 
> > > Why don't you just send individual patches for each subsystem? I'm not a maintainer but I don't see
> > > how any one person is going to be able to apply this whole series, it is making it hard for
> > > maintainers if they have to pick patches out from among the series (if indeed any will bother
> > > doing that).
> > Yeah, maybe it would have been better to send individual patches.
> > 
> > From my point of view it's a series because the patches are related (I
> > did a git format-patch from my local branch). But for the maintainers
> > point of view, they are individual patches.
> 
> And the maintainers view is what matters here, if you wish to get your
> patches reviewed and accepted...

Mainly I'd just like to know which you're asking for.  Do you want me to
apply this, or to ACK it so someone else can?  If it's sent as a series
I tend to assume the latter.

But in this case I'm assuming it's the former, so I'll pick up the nfsd
one....

--b.

Re: [PATCH 00/18] use ARRAY_SIZE macro

[Jérémy Lefaure]

On Mon, 2 Oct 2017 15:22:24 -0400
bfields@fieldses.org (J. Bruce Fields) wrote:

> Mainly I'd just like to know which you're asking for.  Do you want me to
> apply this, or to ACK it so someone else can?  If it's sent as a series
> I tend to assume the latter.
> 
> But in this case I'm assuming it's the former, so I'll pick up the nfsd
> one....
Could you to apply the NFSD patch ("nfsd: use ARRAY_SIZE") with the
Reviewed-by: Jeff Layton <jlayton@redhat.com>) tag please ?

This patch is an individual patch and it should not have been sent in a
series (sorry about that).

Thank you,
Jeremy

Re: [PATCH 00/18] use ARRAY_SIZE macro

[J. Bruce Fields]

On Mon, Oct 02, 2017 at 09:33:12PM -0400, Jeremy Lefaure wrote:
> On Mon, 2 Oct 2017 15:22:24 -0400
> bfields@fieldses.org (J. Bruce Fields) wrote:
> 
> > Mainly I'd just like to know which you're asking for.  Do you want me to
> > apply this, or to ACK it so someone else can?  If it's sent as a series
> > I tend to assume the latter.
> > 
> > But in this case I'm assuming it's the former, so I'll pick up the nfsd
> > one....
> Could you to apply the NFSD patch ("nfsd: use ARRAY_SIZE") with the
> Reviewed-by: Jeff Layton <jlayton@redhat.com>) tag please ?
> 
> This patch is an individual patch and it should not have been sent in a
> series (sorry about that).

Applying for 4.15, thanks.--b.

Re: [PATCH 00/18] use ARRAY_SIZE macro

[Mauro Carvalho Chehab]

Em Sun, 1 Oct 2017 20:52:20 -0400
Jeremy Lefaure <jeremy.lefaure@lse.epita.fr> escreveu:

> Anyway, I can tell to each maintainer that they can apply the patches
> they're concerned about and next time I may send individual patches.

In the case of media, we'll handle it as if they were individual ones.

Thanks,
Mauro