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asm-generic: introduce asm/bitsperlong.h

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This provides a reliable way for asm-generic/types.h and other
files to find out if it is running on a 32 or 64 bit platform.

We cannot use CONFIG_64BIT for this in headers that are included
from user space because CONFIG symbols are not available there.
We also cannot do it inside of asm/types.h because some headers
need the word size but cannot include types.h.

The solution is to introduce a new header <asm/bitsperlong.h>
that defines both __BITS_PER_LONG for user space and
BITS_PER_LONG for usage in the kernel. The asm-generic
version falls back to 32 bit unless the architecture overrides
it, which I did for all 64 bit platforms.

Signed-off-by: Remis Lima Baima <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
This commit is contained in:
Arnd Bergmann 2009-05-13 22:56:25 +00:00 • committed by Arnd Bergmann
commit c31ae4bb4a
33 changed files with 145 additions and 46 deletions
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arch/cris/include/asm/bitsperlong.h Normal file
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#include <asm-generic/bitsperlong.h>