The driver seems to abuse *unsigned long* not only for the (32-bit)
register values but also for the 'sh_cmt_channel::total_cycles' which
needs to always be 64-bit -- as a result, the clocksource's mask is
needlessly clamped down to 32-bits on the 32-bit machines...
Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
---
This patch is against the 'tip.git' repo's 'timers/core' branch plus the fixup
for the 64-bit machines reposted last Saturday...
drivers/clocksource/sh_cmt.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
Index: tip/drivers/clocksource/sh_cmt.c
===================================================================
--- tip.orig/drivers/clocksource/sh_cmt.c
+++ tip/drivers/clocksource/sh_cmt.c
@@ -108,7 +108,7 @@ struct sh_cmt_channel {
raw_spinlock_t lock;
struct clock_event_device ced;
struct clocksource cs;
- unsigned long total_cycles;
+ u64 total_cycles;
bool cs_enabled;
};
@@ -613,8 +613,8 @@ static u64 sh_cmt_clocksource_read(struc
{
struct sh_cmt_channel *ch = cs_to_sh_cmt(cs);
unsigned long flags;
- unsigned long value;
u32 has_wrapped;
+ u64 value;
u32 raw;
raw_spin_lock_irqsave(&ch->lock, flags);
@@ -688,7 +688,7 @@ static int sh_cmt_register_clocksource(s
cs->disable = sh_cmt_clocksource_disable;
cs->suspend = sh_cmt_clocksource_suspend;
cs->resume = sh_cmt_clocksource_resume;
- cs->mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);
+ cs->mask = CLOCKSOURCE_MASK(sizeof(u64) * 8);
cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
dev_info(&ch->cmt->pdev->dev, "ch%u: used as clock source\n",
