bitsperlong.h (1091B) - Raw
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef __ASM_GENERIC_BITS_PER_LONG 3 #define __ASM_GENERIC_BITS_PER_LONG 4 5 #ifndef __BITS_PER_LONG 6 /* 7 * In order to keep safe and avoid regression, only unify uapi 8 * bitsperlong.h for some archs which are using newer toolchains 9 * that have the definitions of __CHAR_BIT__ and __SIZEOF_LONG__. 10 * See the following link for more info: 11 * https://lore.kernel.org/linux-arch/b9624545-2c80-49a1-ac3c-39264a591f7b@app.fastmail.com/ 12 */ 13 #if defined(__CHAR_BIT__) && defined(__SIZEOF_LONG__) 14 #define __BITS_PER_LONG (__CHAR_BIT__ * __SIZEOF_LONG__) 15 #else 16 /* 17 * There seems to be no way of detecting this automatically from user 18 * space, so 64 bit architectures should override this in their 19 * bitsperlong.h. In particular, an architecture that supports 20 * both 32 and 64 bit user space must not rely on CONFIG_64BIT 21 * to decide it, but rather check a compiler provided macro. 22 */ 23 #define __BITS_PER_LONG 32 24 #endif 25 #endif 26 27 #ifndef __BITS_PER_LONG_LONG 28 #define __BITS_PER_LONG_LONG 64 29 #endif 30 31 #endif /* __ASM_GENERIC_BITS_PER_LONG */