svn commit: r185874 - head/sys/sys

[M. Warner Losh]

In message: <200812101945.mBAJjwn2040853 at svn.freebsd.org>
            John Baldwin <jhb at FreeBSD.org> writes:
: Author: jhb
: Date: Wed Dec 10 19:45:58 2008
: New Revision: 185874
: URL: http://svn.freebsd.org/changeset/base/185874
: 
: Log:
:   Rather than using a char array with explicit assumptions about the layout
:   of 'struct osigevent' in 'struct aiocb', use int and void pointer spare
:   members that are identical to 'struct osigevent'.

This is better from an alignment perspective for !intel architectures.

warner

:   MFC after:	1 month
: 
: Modified:
:   head/sys/sys/aio.h
: 
: Modified: head/sys/sys/aio.h
: ==============================================================================
: --- head/sys/sys/aio.h	Wed Dec 10 19:33:10 2008	(r185873)
: +++ head/sys/sys/aio.h	Wed Dec 10 19:45:58 2008	(r185874)
: @@ -69,7 +69,8 @@ typedef struct aiocb {
:  	off_t	aio_offset;		/* File offset for I/O */
:  	volatile void *aio_buf;         /* I/O buffer in process space */
:  	size_t	aio_nbytes;		/* Number of bytes for I/O */
: -	char 	__spare__[sizeof(int) * 2 + sizeof(void *)]; /* osigevent. */
: +	int	__spare__[2];
: +	void	*__spare2__;
:  	int	aio_lio_opcode;		/* LIO opcode */
:  	int	aio_reqprio;		/* Request priority -- ignored */
:  	struct	__aiocb_private	_aiocb_private;
: