Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / asm-generic / bitops / builtin-__ffs.h

diff --git a/kernel/include/asm-generic/bitops/builtin-__ffs.h b/kernel/include/asm-generic/bitops/builtin-__ffs.h
new file mode 100644 (file)
index 0000000..90041e3
--- /dev/null
+++ b/kernel/include/asm-generic/bitops/builtin-__ffs.h
@@ -0,0 +1,15 @@
+#ifndef _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
+#define _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
+
+/**
+ * __ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ */
+static __always_inline unsigned long __ffs(unsigned long word)
+{
+       return __builtin_ctzl(word);
+}
+
+#endif