This patch introduces the C-language equivalent of the function:
unsigned long ffz(unsigned long word);
In include/asm-generic/bitops/ffz.h
This code largely copied from:
include/asm-parisc/bitops.h
Signed-off-by: Akinobu Mita <[email protected]>
include/asm-generic/bitops/ffz.h | 12 ++++++++++++
1 files changed, 12 insertions(+)
Index: 2.6-rc/include/asm-generic/bitops/ffz.h
===================================================================
--- /dev/null
+++ 2.6-rc/include/asm-generic/bitops/ffz.h
@@ -0,0 +1,12 @@
+#ifndef _ASM_GENERIC_BITOPS_FFZ_H_
+#define _ASM_GENERIC_BITOPS_FFZ_H_
+
+/*
+ * ffz - find first zero in word.
+ * @word: The word to search
+ *
+ * Undefined if no zero exists, so code should check against ~0UL first.
+ */
+#define ffz(x) __ffs(~(x))
+
+#endif /* _ASM_GENERIC_BITOPS_FFZ_H_ */
--