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| author | H. Peter Anvin | 2013-04-28 01:07:49 +0200 |
|---|---|---|
| committer | H. Peter Anvin | 2013-06-26 00:50:04 +0200 |
| commit | 2fc016c5bd8aad2e201cdf71b9fb4573f94775bd (patch) | |
| tree | 14da7d26a56b2f372e7d4a28422982efbabe9a7c /include/uapi/linux/const.h | |
| parent | x86/vdso: Convert use of typedef ctl_table to struct ctl_table (diff) | |
| download | kernel-qcow2-linux-2fc016c5bd8aad2e201cdf71b9fb4573f94775bd.tar.gz kernel-qcow2-linux-2fc016c5bd8aad2e201cdf71b9fb4573f94775bd.tar.xz kernel-qcow2-linux-2fc016c5bd8aad2e201cdf71b9fb4573f94775bd.zip | |
linux/const.h: Add _BITUL() and _BITULL()
Add macros for single bit definitions of a specific type. These are
similar to the BIT() macro that already exists, but with a few
exceptions:
1. The namespace is such that they can be used in uapi definitions.
2. The type is set with the _AC() macro to allow it to be used in
assembly.
3. The type is explicitly specified to be UL or ULL.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-nbca8p7cg6jyjoit7klh3o91@git.kernel.org
Diffstat (limited to 'include/uapi/linux/const.h')
| -rw-r--r-- | include/uapi/linux/const.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/uapi/linux/const.h b/include/uapi/linux/const.h index c22c707c455d..c872bfd25e13 100644 --- a/include/uapi/linux/const.h +++ b/include/uapi/linux/const.h @@ -21,4 +21,7 @@ #define _AT(T,X) ((T)(X)) #endif +#define _BITUL(x) (_AC(1,UL) << (x)) +#define _BITULL(x) (_AC(1,ULL) << (x)) + #endif /* !(_LINUX_CONST_H) */ |