diff options
Diffstat (limited to 'datapath/linux-2.6/compat-2.6/include/linux/log2.h')
| -rw-r--r-- | datapath/linux-2.6/compat-2.6/include/linux/log2.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/datapath/linux-2.6/compat-2.6/include/linux/log2.h b/datapath/linux-2.6/compat-2.6/include/linux/log2.h new file mode 100644 index 000000000..69abae5e8 --- /dev/null +++ b/datapath/linux-2.6/compat-2.6/include/linux/log2.h @@ -0,0 +1,17 @@ +#ifndef __LINUX_LOG2_WRAPPER +#define __LINUX_LOG2_WRAPPER + +#ifdef HAVE_LOG2_H +#include_next <linux/log2.h> +#else +/* This is very stripped down because log2.h has far too many dependencies. */ + +extern __attribute__((const, noreturn)) +int ____ilog2_NaN(void); + +#define ilog2(n) ((n) == 4 ? 2 : \ + (n) == 8 ? 3 : \ + ____ilog2_NaN()) +#endif + +#endif |