From: Dan Horák <dan@danny.cz>
Date: Sun, 30 Dec 2012 22:03:36 +0000 (-0500)
Subject: implement get_cpu_clock() for s390/s390x
X-Git-Tag: fio-2.0.13~13
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=15cf40b2844caad4cf8da0cdaeddd132cd6adefc;hp=71339117638469372f703332d8b969382b12c49b

implement get_cpu_clock() for s390/s390x

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/arch/arch-s390.h b/arch/arch-s390.h
index fe517913..bcd91636 100644
--- a/arch/arch-s390.h
+++ b/arch/arch-s390.h
@@ -22,4 +22,22 @@
 #define read_barrier()	asm volatile("bcr 15,0" : : : "memory")
 #define write_barrier()	asm volatile("bcr 15,0" : : : "memory")
 
+static inline unsigned long long get_cpu_clock(void)
+{
+	unsigned long long clk;
+
+	__asm__ __volatile__("stck %0" : "=Q" (clk) : : "cc");
+	return clk;
+}
+
+#define ARCH_HAVE_INIT
+extern int tsc_reliable;
+static inline int arch_init(char *envp[])
+{
+	tsc_reliable = 1;
+	return 0;
+}
+
+#define ARCH_HAVE_CPU_CLOCK
+
 #endif