[PATCH 3.10 35/65] arm64: kernel: compiling issue, need delete read_current_timer()

Greg Kroah-Hartman
2015-05-02T19:50:11Z

From: Chen Gang <gang.chen@asianux.com>

commit 6916b14ea140ff5c915895eefe9431888a39a84d upstream.

Under arm64, we will calibrate the delay loop statically using a known
timer frequency, so delete read_current_timer(), or it will cause
compiling issue with allmodconfig.

The related error:
ERROR: "read_current_timer" [lib/rbtree_test.ko] undefined!
ERROR: "read_current_timer" [lib/interval_tree_test.ko] undefined!
ERROR: "read_current_timer" [fs/ext4/ext4.ko] undefined!
ERROR: "read_current_timer" [crypto/tcrypt.ko] undefined!

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/arm64/include/asm/timex.h | 6 +++---
arch/arm64/kernel/time.c | 6 ------
2 files changed, 3 insertions(+), 9 deletions(-)

--- a/arch/arm64/include/asm/timex.h
+++ b/arch/arm64/include/asm/timex.h
@@ -16,14 +16,14 @@
#ifndef __ASM_TIMEX_H
#define __ASM_TIMEX_H

+#include <asm/arch_timer.h>
+
/*
* Use the current timer as a cycle counter since this is what we use for
* the delay loop.
*/
-#define get_cycles() ({ cycles_t c; read_current_timer(&c); c; })
+#define get_cycles() arch_counter_get_cntvct()

#include <asm-generic/timex.h>

-#define ARCH_HAS_READ_CURRENT_TIMER
-
#endif
--- a/arch/arm64/kernel/time.c
+++ b/arch/arm64/kernel/time.c
@@ -68,12 +68,6 @@ unsigned long long notrace sched_clock(v
return arch_timer_read_counter() * sched_clock_mult;
}

-int read_current_timer(unsigned long *timer_value)
-{
- *timer_value = arch_timer_read_counter();
- return 0;
-}
-
void __init time_init(void)
{
u32 arch_timer_rate;