1 files changed, 27 insertions, 0 deletions

diff --git a/include/asm-x86_64/delay.h b/include/asm-x86_64/delay.h
new file mode 100644
index 000000000000..65f64acc5319
--- /dev/null
+++ b/include/asm-x86_64/delay.h
@@ -0,0 +1,27 @@
+#ifndef _X8664_DELAY_H
+#define _X8664_DELAY_H
+
+/*
+ * Copyright (C) 1993 Linus Torvalds
+ *
+ * Delay routines calling functions in arch/x86_64/lib/delay.c
+ */
+ 
+extern void __bad_udelay(void);
+extern void __bad_ndelay(void);
+
+extern void __udelay(unsigned long usecs);
+extern void __ndelay(unsigned long usecs);
+extern void __const_udelay(unsigned long usecs);
+extern void __delay(unsigned long loops);
+
+#define udelay(n) (__builtin_constant_p(n) ? \
+        ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c6ul)) : \
+        __udelay(n))
+
+#define ndelay(n) (__builtin_constant_p(n) ? \
+       ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
+       __ndelay(n))
+
+
+#endif /* defined(_X8664_DELAY_H) */