define first set of BIT* macros

define first set of BIT* macros

- move BITOP_MASK and BITOP_WORD from asm-generic/bitops/atomic.h to
  include/linux/bitops.h and rename it to BIT_MASK and BIT_WORD
- move BITS_TO_LONGS and BITS_PER_BYTE to bitops.h too and allow easily
  define another BITS_TO_something (e.g. in event.c) by BITS_TO_TYPE macro
Remaining (and common) BIT macro will be defined after all occurences and
conflicts will be sorted out in the patches.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 8 insertions, 3 deletions

diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index b9fb8ee3308b..939e80bdbef7 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -2,6 +2,14 @@
 #define _LINUX_BITOPS_H
 #include <asm/types.h>
 
+#ifdef  __KERNEL__
+#define BIT_MASK(nr)            (1UL << ((nr) % BITS_PER_LONG))
+#define BIT_WORD(nr)            ((nr) / BITS_PER_LONG)
+#define BITS_TO_TYPE(nr, t)     (((nr)+(t)-1)/(t))
+#define BITS_TO_LONGS(nr)       BITS_TO_TYPE(nr, BITS_PER_LONG)
+#define BITS_PER_BYTE           8
+#endif
+
 /*
  * Include this here because some architectures need generic_ffs/fls in
  * scope
diff --git a/include/linux/types.h b/include/linux/types.h
index 0351bf2fac85..4f0dad21c917 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -3,12 +3,9 @@
 
 #ifdef  __KERNEL__
 
-#define BITS_TO_LONGS(bits) \
-        (((bits)+BITS_PER_LONG-1)/BITS_PER_LONG)
 #define DECLARE_BITMAP(name,bits) \
         unsigned long name[BITS_TO_LONGS(bits)]
 
-#define BITS_PER_BYTE 8
 #endif
 
 #include <linux/posix_types.h>