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authorJiri Slaby <jirislaby@gmail.com>2007-10-18 23:40:31 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:42 -0700
commitd05be13bcc6ec615fb2e9556a9b85d52800669b6 (patch)
treee75cee7b28e2a22d94f29fdd44746ea14f4fc6b8 /include/linux/bitops.h
parent5159f40742508e03aed4273a9b3ef06f4e71929f (diff)
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>
Diffstat (limited to 'include/linux/bitops.h')
-rw-r--r--include/linux/bitops.h8
1 files changed, 8 insertions, 0 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