Re: mtd/include/mtd mtd-abi.h,1.1,1.2

[tglx@linutronix.de (Thomas Gleixner)]

On Friday 04 June 2004 10:47, David Woodhouse wrote:
> On Fri, 2004-06-04 at 09:16 +0100, gleixner@infradead.org wrote:
> > Log Message:
> > Extend eccpos array to support HW8_512 ecc on 2k chips. Signed-off-by:
> > Thomas Gleixner <tglx@linutronix.de>
>
> Er, you just changed the kernel<->user ABI and broke all existing
> userspace tools compiled with the old one.
>
> Which is OK since this hasn't gone to Linus yet.... but as soon as it
> goes to Linus these things are set in stone and you have to extend, not
> change.

I know.

> Do we want a couple of ints in that structure saying how big the arrays
> are? While we're at it, it's better to use explicitly sized types to
> make 64<->32 bit ioctl conversion easier.

Sure.

> > --- mtd-abi.h	5 May 2004 14:44:57 -0000	1.1
> > +++ mtd-abi.h	4 Jun 2004 08:16:06 -0000	1.2
> > @@ -86,7 +86,7 @@
> >  struct nand_oobinfo {
> >  	int	useecc;
> >  	int	eccbytes;
> > -	int	eccpos[24];
> > +	int	eccpos[32];
> >  	int	oobfree[8][2];
> >  };

-- 
Thomas
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