Re: "read_current_timer" undefined!

From: Alexander Holler
Date: Fri Oct 19 2012 - 02:20:00 EST


Am 18.10.2012 14:16, schrieb Thomas Meyer:

ERROR: "read_current_timer" [drivers/gpu/drm/udl/udl.ko] undefined!
ERROR: "read_current_timer" [crypto/tcrypt.ko] undefined!

There is already a long thread about that, along with patches:

If you need a patch for 3.6, here is what I did before I found the above thread:

From a026451fdc98a5981e10a18ffa394e53a40b0691 Mon Sep 17 00:00:00 2001
From: Alexander Holler <holler@xxxxxxxxxxxxx>
Date: Thu, 18 Oct 2012 07:29:39 +0200
Subject: [PATCH] arm: arch timer: export read_current_timer()

Exporting read_current_timmer is needed e.g. for users of get_cycles()
like udlfb which otherwise can't be build as a module.

This seems to have been forgotten in
commit 923df96b9f31b7d08d8438ff9677326d9537accf.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Alexander Holler <holler@xxxxxxxxxxxxx>
arch/arm/kernel/arch_timer.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/arm/kernel/arch_timer.c b/arch/arm/kernel/arch_timer.c
index cf25880..7f24d1f 100644
--- a/arch/arm/kernel/arch_timer.c
+++ b/arch/arm/kernel/arch_timer.c
@@ -19,6 +19,7 @@
#include <linux/interrupt.h>
#include <linux/of_irq.h>
#include <linux/io.h>
+#include <linux/export.h>

#include <asm/cputype.h>
#include <asm/localtimer.h>
@@ -232,6 +233,7 @@ int read_current_timer(unsigned long *timer_val)
*timer_val = arch_counter_get_cntpct();
return 0;

static struct clocksource clocksource_counter = {
.name = "arch_sys_counter",


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