On Mon, 26 Nov 2007, Joonwoo Park wrote:
> 2007/11/26, Robert P. J. Day <[email protected]>:
> > i realized that. but all you can say is that only amb_init() calls
> > setup_dev() *currently*. when you're not looking, someone else might
> > (for whatever reason) call setup_dev() from elsewhere, and *that* call
> > might not zero that memory area.
> >
> > IMHO, the only safe transforms of kmalloc+memset -> kzalloc are those
> > in which the flow of control is unmistakable and invariant. splitting
> > that across a function call seems like a dangerous thing to do.
> > (except, of course, in the case, where the kzalloc() is added inside
> > the function -- then all callers are entitled to simplify *their*
> > code. but that's different.)
> >
> > in any event, i just thought i'd point it out. if you're absolutely
> > sure there will never be another call to setup_dev() from somewhere
> > else, then, yes, it's safe.
> >
>
> I understood your opinions. and partially agree with you.
> But isn't it a unfounded fear?
i don't know, i just thought i'd mention it. if no one thinks it's an
issue, it's certainly fine with me.
rday
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA
http://crashcourse.ca
========================================================================
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