what does this do ?

[Ramesh.P]

Hi,


On Sun, Jan 13, 2013 at 8:50 PM, horseriver <horserivers at gmail.com> wrote:

> On Sun, Jan 13, 2013 at 09:27:45PM -0800, Dave Hylands wrote:
> > Hi,
> >
> > On Sun, Jan 13, 2013 at 11:29 AM, horseriver <horserivers at gmail.com>
> wrote:
> > >
> > > hi:
> > >
> > >   In kernel code . some function is defined  by
> >  __attribute__((__section__(".initcall" level ".init")))
> > >
> > >   what does this do ?
> >
> > It puts the address of the function in a linker section named
> > .initcallX.init where X is replaced by the level.
> >
> > These functions are called in order to initialize various subsystems and
> > drivers during kernel bootup.
>
>   Thanks!
>
>   Another question:
>
>   __attribute__((regparm(3)))    ;  what does this do ?
>
>
It causes the compiler to pass the argument (3 in this case) to be passed
in registers (like EAX, ECX and EDX) instead of stack.

Thanks,
Ramesh


>
>
>
> > --
> > Dave Hylands
> > Shuswap, BC, Canada
> > http://www.davehylands.com
>
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