Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/include/asm-generic/bitops/sched.h b/kernel/include/asm-generic/bitops/sched.h
new file mode 100644 (file)
index 0000000..604fab7
--- /dev/null
+++ b/kernel/include/asm-generic/bitops/sched.h
@@ -0,0 +1,31 @@
+#ifndef _ASM_GENERIC_BITOPS_SCHED_H_
+#define _ASM_GENERIC_BITOPS_SCHED_H_
+
+#include <linux/compiler.h>    /* unlikely() */
+#include <asm/types.h>
+
+/*
+ * Every architecture must define this function. It's the fastest
+ * way of searching a 100-bit bitmap.  It's guaranteed that at least
+ * one of the 100 bits is cleared.
+ */
+static inline int sched_find_first_bit(const unsigned long *b)
+{
+#if BITS_PER_LONG == 64
+       if (b[0])
+               return __ffs(b[0]);
+       return __ffs(b[1]) + 64;
+#elif BITS_PER_LONG == 32
+       if (b[0])
+               return __ffs(b[0]);
+       if (b[1])
+               return __ffs(b[1]) + 32;
+       if (b[2])
+               return __ffs(b[2]) + 64;
+       return __ffs(b[3]) + 96;
+#else
+#error BITS_PER_LONG not defined
+#endif
+}
+
+#endif /* _ASM_GENERIC_BITOPS_SCHED_H_ */