1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* atmapi.h - ATM API user space/kernel compatibility */ 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun /* Written 1999,2000 by Werner Almesberger, EPFL ICA */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #ifndef _LINUX_ATMAPI_H 8*4882a593Smuzhiyun #define _LINUX_ATMAPI_H 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #if defined(__sparc__) || defined(__ia64__) 11*4882a593Smuzhiyun /* such alignment is not required on 32 bit sparcs, but we can't 12*4882a593Smuzhiyun figure that we are on a sparc64 while compiling user-space programs. */ 13*4882a593Smuzhiyun #define __ATM_API_ALIGN __attribute__((aligned(8))) 14*4882a593Smuzhiyun #else 15*4882a593Smuzhiyun #define __ATM_API_ALIGN 16*4882a593Smuzhiyun #endif 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun /* 20*4882a593Smuzhiyun * Opaque type for kernel pointers. Note that _ is never accessed. We need 21*4882a593Smuzhiyun * the struct in order hide the array, so that we can make simple assignments 22*4882a593Smuzhiyun * instead of being forced to use memcpy. It also improves error reporting for 23*4882a593Smuzhiyun * code that still assumes that we're passing unsigned longs. 24*4882a593Smuzhiyun * 25*4882a593Smuzhiyun * Convention: NULL pointers are passed as a field of all zeroes. 26*4882a593Smuzhiyun */ 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun typedef struct { unsigned char _[8]; } __ATM_API_ALIGN atm_kptr_t; 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun #endif 31