linux-kernel - Re: [patch 03/11] GRU Driver - driver internal header files

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Message-ID: <adak5gy70hh.fsf@cisco.com>
Date:	Mon, 09 Jun 2008 14:38:18 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	steiner@....com
Cc:	akpm@...l.org, linux-kernel@...r.kernel.org, mingo@...e.hu,
	tglx@...utronix.de, holt@....com, andrea@...ranet.com
Subject: Re: [patch 03/11] GRU Driver - driver internal header files

 > +/*
 > + * Structure used to pass TLB flush parameters to the driver
 > + */
 > +struct gru_flush_tlb_req {
 > +	unsigned long	gseg;
 > +	unsigned long	vaddr;
 > +	size_t		len;
 > +};

This and other data structures you pass into the kernel via ioctl() are
not 32/64 clean.  So a 32-bit process (which can easily run on a 64-bit
x86-64 kernel) will end up sending garbage to the kernel.
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