Current File : //usr/include/asm-generic/bitsperlong.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __ASM_GENERIC_BITS_PER_LONG
#define __ASM_GENERIC_BITS_PER_LONG
#ifndef __BITS_PER_LONG
/*
* In order to keep safe and avoid regression, only unify uapi
* bitsperlong.h for some archs which are using newer toolchains
* that have the definitions of __CHAR_BIT__ and __SIZEOF_LONG__.
* See the following link for more info:
* https://lore.kernel.org/linux-arch/b9624545-2c80-49a1-ac3c-39264a591f7b@app.fastmail.com/
*/
#if defined(__CHAR_BIT__) && defined(__SIZEOF_LONG__)
#define __BITS_PER_LONG (__CHAR_BIT__ * __SIZEOF_LONG__)
#else
/*
* There seems to be no way of detecting this automatically from user
* space, so 64 bit architectures should override this in their
* bitsperlong.h. In particular, an architecture that supports
* both 32 and 64 bit user space must not rely on CONFIG_64BIT
* to decide it, but rather check a compiler provided macro.
*/
#define __BITS_PER_LONG 32
#endif
#endif
#endif /* __ASM_GENERIC_BITS_PER_LONG */
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