File-system driver issue

[Rohan Puri]

On Wed, Jun 26, 2013 at 1:44 AM, Saket Sinha <saket.sinha89 at gmail.com> wrote:
> I have to port a driver from 2.6.18 to 3.8.3
>
> Look at the below declaration of current
> http://lxr.free-electrons.com/source/scripts/kconfig/gconf.c#L62
> Where struct menu is
> http://lxr.free-electrons.com/source/scripts/kconfig/expr.h#L159
>
> The above one is in kconfig while the lower one is in the kernel. So would
> they be able to affect each other? I guess NO
>
> NOW in the driver to be ported-
> current is defined as:
> struct task_struct *task = current;
>
> but is still able to excess  the field members of task_struct
>  http://lxr.linux.no/linux+v2.6.18/include/linux/sched.h#L767
> like
> attr.ia_uid = current->uid;
> attr.ia_gid = current->gid;
>
> though it has not been initialized or assigned or typecasted to this
> task_struct.
> HOW?
>
> I searched on the entire lxr but could not find the solution.
> Kindly help.
> PS: This driver is built on 2.6.28 kernel so use lxr from 2.6.18 kernel only
> like
>  http://lxr.linux.no/linux+v2.6.18/
>
>
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>
Hi Saket,

Its arch specifc, check file
http://lxr.linux.no/#linux+v2.6.18/include/asm-x86_64/current.h#L15

- Rohan