1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* atmapi.h - ATM API user space/kernel compatibility */ 3 4 /* Written 1999,2000 by Werner Almesberger, EPFL ICA */ 5 6 7 #ifndef _LINUX_ATMAPI_H 8 #define _LINUX_ATMAPI_H 9 10 #if defined(__sparc__) || defined(__ia64__) 11 /* such alignment is not required on 32 bit sparcs, but we can't 12 figure that we are on a sparc64 while compiling user-space programs. */ 13 #define __ATM_API_ALIGN __attribute__((aligned(8))) 14 #else 15 #define __ATM_API_ALIGN 16 #endif 17 18 19 /* 20 * Opaque type for kernel pointers. Note that _ is never accessed. We need 21 * the struct in order hide the array, so that we can make simple assignments 22 * instead of being forced to use memcpy. It also improves error reporting for 23 * code that still assumes that we're passing unsigned longs. 24 * 25 * Convention: NULL pointers are passed as a field of all zeroes. 26 */ 27 28 typedef struct { unsigned char _[8]; } __ATM_API_ALIGN atm_kptr_t; 29 30 #endif 31