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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-12 18:15:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-12 18:15:51 -0700 |
| commit | cd166bd0dde265a97dd9aa8e3451a2646d96d04b (patch) | |
| tree | 3a7fb5b8bb8d7676e804845b75977be380b8dcff /include/asm-generic/bitsperlong.h | |
| parent | 6b702462cbe5b6f372966a53f4465d745d86b65c (diff) | |
| parent | 5b02ee3d219f9e01b6e9146e25613822cfc2e5ce (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
add generic lib/checksum.c
asm-generic: add a generic uaccess.h
asm-generic: add generic NOMMU versions of some headers
asm-generic: add generic atomic.h and io.h
asm-generic: add legacy I/O header files
asm-generic: add generic versions of common headers
asm-generic: make bitops.h usable
asm-generic: make pci.h usable directly
asm-generic: make get_rtc_time overridable
asm-generic: rename page.h and uaccess.h
asm-generic: rename atomic.h to atomic-long.h
asm-generic: add a generic unistd.h
asm-generic: add generic ABI headers
asm-generic: add generic sysv ipc headers
asm-generic: introduce asm/bitsperlong.h
asm-generic: rename termios.h, signal.h and mman.h
Diffstat (limited to 'include/asm-generic/bitsperlong.h')
| -rw-r--r-- | include/asm-generic/bitsperlong.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/asm-generic/bitsperlong.h b/include/asm-generic/bitsperlong.h new file mode 100644 index 000000000000..4ae54e07de83 --- /dev/null +++ b/include/asm-generic/bitsperlong.h @@ -0,0 +1,32 @@ +#ifndef __ASM_GENERIC_BITS_PER_LONG +#define __ASM_GENERIC_BITS_PER_LONG + +/* + * 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. + */ +#ifndef __BITS_PER_LONG +#define __BITS_PER_LONG 32 +#endif + +#ifdef __KERNEL__ + +#ifdef CONFIG_64BIT +#define BITS_PER_LONG 64 +#else +#define BITS_PER_LONG 32 +#endif /* CONFIG_64BIT */ + +/* + * FIXME: The check currently breaks x86-64 build, so it's + * temporarily disabled. Please fix x86-64 and reenable + */ +#if 0 && BITS_PER_LONG != __BITS_PER_LONG +#error Inconsistent word size. Check asm/bitsperlong.h +#endif + +#endif /* __KERNEL__ */ +#endif /* __ASM_GENERIC_BITS_PER_LONG */ |