Messages in this thread | | | Subject | Re: [Lse-tech] [RFC] fork historic module | From | Guillaume Thouvenin <> | Date | Mon, 20 Dec 2004 08:28:45 +0100 |
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On Fri, 2004-12-17 at 16:11 +0100, Andi Kleen wrote: > > +/* IOCTL numbers */ > > +/* If you add a new IOCTL number don't forget to update FH_MAXNR */ > > +#define FH_MAGIC 0x35 > > +#define FH_REGISTER _IO(FH_MAGIC,0) > > +#define FH_UNREGISTER _IO(FH_MAGIC,1) > > Is this really unique? 32bit emulation currently needs unique ioctl numbers.
I read the Documentation/ioctl-number.txt file and 0x35 is not mentioned in this file. But I made a grep on 'MAGIC' and '35' in the Linux source tree and you're right, this number is already used by POR_MAGIC_2.
Is a grep in the Linux source tree is enough to know if the value is unique?
Thanks, Guillaume
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