cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/fddi/skfp/h/mbuf.h

/******************************************************************************
 *
 *      (C)Copyright 1998,1999 SysKonnect,
 *      a business unit of Schneider & Koch & Co. Datensysteme GmbH.
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *
 *      The information in this file is provided "AS IS" without warranty.
 *
 ******************************************************************************/

#ifndef	_MBUF_

#define _MBUF_


#define M_SIZE	4504

#ifndef MAX_MBUF

#define MAX_MBUF	4
#endif

#ifndef NO_STD_MBUF

#define sm_next         m_next

#define sm_off          m_off

#define sm_len          m_len

#define sm_data         m_data

#define SMbuf           Mbuf

#define mtod		smtod

#define mtodoff		smtodoff
#endif


struct s_mbuf {
	
struct s_mbuf	*sm_next ;		/* low level linked list */
	
short		sm_off ;			/* offset in m_data */
	
u_int		sm_len ;			/* len of data */
#ifdef	PCI
	
int		sm_use_count ;
#endif
	
char		sm_data[M_SIZE] ;
} ;


typedef struct s_mbuf SMbuf ;

/* mbuf head, to typed data */

#define	smtod(x,t)	((t)((x)->sm_data + (x)->sm_off))

#define	smtodoff(x,t,o)	((t)((x)->sm_data + (o)))

#endif	/* _MBUF_ */

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