On Fri, 2006-03-03 at 16:10 +0100, Adrian Bunk wrote:
> On Fri, Mar 03, 2006 at 09:48:46AM -0500, James C. Georgas wrote:
> > On Fri, 2006-03-03 at 12:46 +0100, Adrian Bunk wrote:
> > > On Thu, Mar 02, 2006 at 11:44:57PM -0500, James C. Georgas wrote:
> > > > On Thu, 2006-02-03 at 22:44 +0100, Adrian Bunk wrote:
> > > >
> > > > > > >
> > > > > > > We do not have to export symbols we don't want to export to modules but
> > > > > > > needed by CONFIG_UNIX.
> > > > > >
> > > > > > Sorry, I must just be dense, or something.
> > > > > >
> > > > > > Is not the only difference between a modular driver and a built in
> > > > > > driver supposed to be the initialization and cleanup functions?
> > > > > >
> > > > > > I don't see why you would have to expose any additional symbols, over
> > > > > > and above the existing required symbols, to load your module.
> > > > >
> > > > > Every kernel symbol a module uses must be explicitely exported with
> > > > > EXPORT_SYMBOL.
> > > >
> > > > Yes, I understand that I need to export symbols to define the interface
> > > > to my driver. whether its a module or compiled in. This is how other
> > > > systems interact with my driver, right?
> > >
> > > EXPORT_SYMBOL is only required for modules.
> > >
> > > > > CONFIG_UNIX uses symbols that are neither used by any other in-kernel
> > > > > modules nor should be exported.
> > > >
> > > > Are you saying that AF_UNIX has to export symbols for its own private
> > > > functions in order to call them? I guess I don't understand this. Why
> > > > not just call them. They're in scope within the driver code, aren't
> > > > they?
> > >
> > > No, this is about functions defined in other parts of the kernel.
> > >
> >
> > Ok, if I understand you correctly now, there is a function defined in
> > another part of the kernel, which is _called_ by AF_UNIX, and it is for
> > this function that the other part of the kernel must export a symbol?
> >
> > But you only need to do this so that modules can use the function,
> > because if, instead, the driver is built in, then the function is
> > directly in scope, and can be called explicitly?
>
> Correct.
Ok, I understand.
What are the exported symbols, and where are they defined?
I read the post you linked to earlier, but I got nothing when I grepped
for "get_max_files", which was mentioned.
--
James C. Georgas <[email protected]>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
