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size of ioctl

To: linux-mips@oss.sgi.com
Subject: size of ioctl
From: Tom Appermont <tea@sonycom.com>
Date: Thu, 15 Mar 2001 14:16:58 +0100
Sender: owner-linux-mips@oss.sgi.com
Howdy,

Can anybody tell me why the size of ioctl messages is limited 
to 256 bytes on mips:

include/asm-mips/ioctl.h:

...

/*
 * We to additionally limit parameters to a maximum 255 bytes.
 */
#define _IOC_SLMASK     0xff

...


I would like to see this changed because the PCMCIA software 
(cardmgr <-> driver services) needs to pass ioctl messages 
around that are a lot bigger than 256 bytes. 

Greetz,

Tom


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