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SubjectRe: [PATCH] zram: include err.h in zram_drv
On (03/20/14 14:44), Andrew Morton wrote:
> > zcomp returns error-valued pointer, also include err.h header
> > in zram_drv.
> >
> > Per Arnd Bergmann:
> > The zram driver uses the ERR_PTR macro defined in <linux/err.h>
> > and relies on this header to be included implicitly through
> > other headers, which is not (always) the case on the ARM architecture.
> >
> > ...
> >
> > --- a/drivers/block/zram/zram_drv.c
> > +++ b/drivers/block/zram/zram_drv.c
> > @@ -31,6 +31,7 @@
> > #include <linux/slab.h>
> > #include <linux/string.h>
> > #include <linux/vmalloc.h>
> > +#include <linux/err.h>
> >
> > #include "zram_drv.h"
>
> I can find no occurrence of ERR_PTR in any version of
> drivers/block/zram/zram_drv.c which I can find.
>
> zram-return-error-valued-pointer-from-zcomp_create.patch adds IS_ERR to
> drivers/block/zram/zram_drv.c which is presumably what you meant.
>

yes. sorry for inconvenience.

> zram-return-error-valued-pointer-from-zcomp_create.patch also adds
> ERR_PTR() calls into drivers/block/zram/zcomp.c so that file should
> include err.h also.
>

missing direct include of err.h in zcomp.h was reported and fixed by
Arnd Bergmann
https://lkml.org/lkml/2014/3/15/39


-ss

>
> Here's what I added, as
> zram-return-error-valued-pointer-from-zcomp_create-fix-2.patch
>
> From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
> Subject: zram: include err.h
>
> [akpm@linux-foundation.org: fix zcomp.h as well]
> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
> Reported-by: Arnd Bergmann <arnd@arndb.de>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> ---
>
> drivers/block/zram/zcomp.c | 1 +
> drivers/block/zram/zram_drv.c | 1 +
> 2 files changed, 2 insertions(+)
>
> diff -puN drivers/block/zram/zram_drv.c~zram-include-errh-in-zram_drv drivers/block/zram/zram_drv.c
> --- a/drivers/block/zram/zram_drv.c~zram-include-errh-in-zram_drv
> +++ a/drivers/block/zram/zram_drv.c
> @@ -31,6 +31,7 @@
> #include <linux/slab.h>
> #include <linux/string.h>
> #include <linux/vmalloc.h>
> +#include <linux/err.h>
>
> #include "zram_drv.h"
>
> diff -puN drivers/block/zram/zcomp.c~zram-include-errh-in-zram_drv drivers/block/zram/zcomp.c
> --- a/drivers/block/zram/zcomp.c~zram-include-errh-in-zram_drv
> +++ a/drivers/block/zram/zcomp.c
> @@ -9,6 +9,7 @@
>
> #include <linux/kernel.h>
> #include <linux/string.h>
> +#include <linux/err.h>
> #include <linux/slab.h>
> #include <linux/wait.h>
> #include <linux/sched.h>
> _
>


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