linux-kernel - Re: [PATCH] drivers: remoteproc: constify rproc

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Message-ID: <20161231175416.GA21596@minitux>
Date:   Sat, 31 Dec 2016 09:54:16 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Bhumika Goyal <bhumirks@...il.com>
Cc:     Julia Lawall <julia.lawall@...6.fr>,
        Ohad Ben-Cohen <ohad@...ery.com>, patrice.chotard@...com,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kernel@...inux.com
Subject: Re: [PATCH] drivers: remoteproc: constify rproc_ops structures

On Sat 31 Dec 02:43 PST 2016, Bhumika Goyal wrote:

> On Fri, Dec 30, 2016 at 5:36 PM, Bjorn Andersson
> <bjorn.andersson@...aro.org> wrote:
> > On Sat 17 Dec 03:29 PST 2016, Bhumika Goyal wrote:
> >
> >> Declare rproc_ops structures as const as they are only passed as an
> >> argument to the function rproc_alloc. This argument is of type const, so
> >> rproc_ops structures having this property can be declared const too.
> >> Done using Coccinelle:
> >>
> >> @r1 disable optional_qualifier @
> >> identifier i;
> >> position p;
> >> @@
> >> static struct rproc_ops i@p = {...};
> >>
> >> @ok1@
> >> identifier r1.i;
> >> position p;
> >> @@
> >> rproc_alloc(...,&i@p,...)
> >>
> >> @bad@
> >> position p!={r1.p,ok1.p};
> >> identifier r1.i;
> >> @@
> >> i@p
> >>
> >> @depends on !bad disable optional_qualifier@
> >> identifier r1.i;
> >> @@
> >> +const
> >> struct rproc_ops i;
> >>
> >> File sizes before:
> >>    text          data     bss     dec     hex filename
> >>    1258           416       0    1674     68a remoteproc/omap_remoteproc.o
> >>    2402           240       0    2642     a52 remoteproc/st_remoteproc.o
> >>    2064           272       0    2336     920 remoteproc/st_slim_rproc.o
> >>    2160           240       0    2400     960 remoteproc/wkup_m3_rproc.o
> >>
> >> File sizes after:
> >>    text          data     bss     dec     hex filename
> >>    1297           368       0    1665     681 remoteproc/omap_remoteproc.o
> >>    2434           192       0    2626     a42 remoteproc/st_remoteproc.o
> >>    2112           240       0    2352     930 remoteproc/st_slim_rproc.o
> >>    2200           192       0    2392     958 remoteproc/wkup_m3_rproc.o
> >>
> >> Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
> >
> > Thanks Bhumika, this looks good.
> >
> > But as Suman already asked. Is there any reason why da8xx_remoteproc.c
> > did not get updated? It looks like the same change would apply there.
> >
> >
> 
> The reason I did not sent a patch for that driver is because the .o
> file is not obtained. This is output I get when I try to compile the
> da8xx_remoteproc.o file.
> 
> drivers/remoteproc/da8xx_remoteproc.c:22:72: fatal error:
> mach/clock.h: No such file or directory
>  #include <mach/clock.h>   /* for davinci_clk_reset_assert/deassert() */
>                                                                         ^
> compilation terminated.
> make[1]: *** [drivers/remoteproc/da8xx_remoteproc.o] Error 1
> make: *** [drivers/remoteproc/da8xx_remoteproc.o] Error 2
> 
> I also tried running the commands  make.cross ARCH=arm allyesconfig;
> make.cross ARCH=arm drivers/remoteproc/da8xx_remoteproc.o but still
> the error remains the same.
> 
> Could you please suggest me what to do in this case?
> 

By using davinci_all_defconfig and then selecting
CONFIG_DA8XX_REMOTEPROC I managed to compile it, not sure what differs.

If you can't get it working please include the da8xx_remoteproc change
as well and just note that you didn't manage to test it.

Regards,
Bjorn