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..0648258
--- /dev/null
+++ b/kernel/include/asm-generic/bitops/builtin-ffs.h
@@ -0,0 +1,17 @@
+#ifndef _ASM_GENERIC_BITOPS_BUILTIN_FFS_H_
+#define _ASM_GENERIC_BITOPS_BUILTIN_FFS_H_
+
+/**
+ * ffs - find first bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+static __always_inline int ffs(int x)
+{
+       return __builtin_ffs(x);
+}
+
+#endif