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Date: Fri, 5 Mar 2010 16:29:05 -0800
From: Tim Bird <tim.bird@...sony.com>
To: Tony Lindgren <tony@...mide.com>,
Russell King <rmk@....linux.org.uk>,
linux-arm-kernel <linux-arm-kernel@...ts.arm.linux.org.uk>,
linux kernel <linux-kernel@...r.kernel.org>,
Steven Rostedt <srostedt@...hat.com>,
Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH 1/2] ftrace - add notrace to sched_clock on various arm platforms
Add notrace attribute to sched_clock, and
subsidiary clock routines, to avoid
recursion within ftrace.
Signed-off-by: Tim Bird <tim.bird@...sony.com>
---
arch/arm/mach-mmp/time.c | 2 +-
arch/arm/mach-pxa/time.c | 2 +-
arch/arm/mach-realview/core.c | 2 +-
arch/arm/mach-sa1100/generic.c | 2 +-
arch/arm/mach-versatile/core.c | 2 +-
arch/arm/plat-omap/common.c | 14 +++++++-------
arch/arm/plat-omap/io.c | 2 +-
7 files changed, 13 insertions(+), 13 deletions(-)
--- a/arch/arm/mach-mmp/time.c
+++ b/arch/arm/mach-mmp/time.c
@@ -72,7 +72,7 @@ static inline uint32_t timer_read(void)
return __raw_readl(TIMERS_VIRT_BASE + TMR_CVWR(0));
}
-unsigned long long sched_clock(void)
+unsigned long long notrace sched_clock(void)
{
unsigned long long v = cnt32_to_63(timer_read());
return (v * tcr2ns_scale) >> TCR2NS_SCALE_FACTOR;
--- a/arch/arm/mach-pxa/time.c
+++ b/arch/arm/mach-pxa/time.c
@@ -51,7 +51,7 @@ static void __init set_oscr2ns_scale(uns
oscr2ns_scale++;
}
-unsigned long long sched_clock(void)
+unsigned long long notrace sched_clock(void)
{
unsigned long long v = cnt32_to_63(OSCR);
return (v * oscr2ns_scale) >> OSCR2NS_SCALE_FACTOR;
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -82,7 +82,7 @@ void __init realview_adjust_zones(int no
* This is the RealView sched_clock implementation. This has
* a resolution of 41.7ns, and a maximum value of about 179s.
*/
-unsigned long long sched_clock(void)
+unsigned long long notrace sched_clock(void)
{
unsigned long long v;
--- a/arch/arm/mach-sa1100/generic.c
+++ b/arch/arm/mach-sa1100/generic.c
@@ -119,7 +119,7 @@ unsigned int sa11x0_getspeed(unsigned in
*
* ( * 1E9 / 3686400 => * 78125 / 288)
*/
-unsigned long long sched_clock(void)
+unsigned long long notrace sched_clock(void)
{
unsigned long long v = cnt32_to_63(OSCR);
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -238,7 +238,7 @@ void __init versatile_map_io(void)
* long as there is always less than 89 seconds between successive
* calls to this function.
*/
-unsigned long long sched_clock(void)
+unsigned long long notrace sched_clock(void)
{
unsigned long long v = cnt32_to_63(readl(VERSATILE_REFCOUNTER));
--- a/arch/arm/plat-omap/common.c
+++ b/arch/arm/plat-omap/common.c
@@ -101,7 +101,7 @@ EXPORT_SYMBOL(omap_get_var_config);
#include <linux/clocksource.h>
#ifdef CONFIG_ARCH_OMAP16XX
-static cycle_t omap16xx_32k_read(struct clocksource *cs)
+static cycle_t notrace omap16xx_32k_read(struct clocksource *cs)
{
return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED);
}
@@ -110,7 +110,7 @@ static cycle_t omap16xx_32k_read(struct
#endif
#ifdef CONFIG_ARCH_OMAP2420
-static cycle_t omap2420_32k_read(struct clocksource *cs)
+static cycle_t notrace omap2420_32k_read(struct clocksource *cs)
{
return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10);
}
@@ -119,7 +119,7 @@ static cycle_t omap2420_32k_read(struct
#endif
#ifdef CONFIG_ARCH_OMAP2430
-static cycle_t omap2430_32k_read(struct clocksource *cs)
+static cycle_t notrace omap2430_32k_read(struct clocksource *cs)
{
return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10);
}
@@ -128,7 +128,7 @@ static cycle_t omap2430_32k_read(struct
#endif
#ifdef CONFIG_ARCH_OMAP3
-static cycle_t omap34xx_32k_read(struct clocksource *cs)
+static cycle_t notrace omap34xx_32k_read(struct clocksource *cs)
{
return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10);
}
@@ -137,7 +137,7 @@ static cycle_t omap34xx_32k_read(struct
#endif
#ifdef CONFIG_ARCH_OMAP4
-static cycle_t omap44xx_32k_read(struct clocksource *cs)
+static cycle_t notrace omap44xx_32k_read(struct clocksource *cs)
{
return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10);
}
@@ -149,7 +149,7 @@ static cycle_t omap44xx_32k_read(struct
* Kernel assumes that sched_clock can be called early but may not have
* things ready yet.
*/
-static cycle_t omap_32k_read_dummy(struct clocksource *cs)
+static cycle_t notrace omap_32k_read_dummy(struct clocksource *cs)
{
return 0;
}
@@ -167,7 +167,7 @@ static struct clocksource clocksource_32
* Returns current time from boot in nsecs. It's OK for this to wrap
* around for now, as it's just a relative time stamp.
*/
-unsigned long long sched_clock(void)
+unsigned long long notrace sched_clock(void)
{
return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k),
clocksource_32k.mult, clocksource_32k.shift);
--- a/arch/arm/plat-omap/io.c
+++ b/arch/arm/plat-omap/io.c
@@ -159,7 +159,7 @@ u16 omap_readw(u32 pa)
}
EXPORT_SYMBOL(omap_readw);
-u32 omap_readl(u32 pa)
+u32 notrace omap_readl(u32 pa)
{
if (cpu_class_is_omap1())
return __raw_readl(OMAP1_IO_ADDRESS(pa));
--
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