[PATCH 60/69] clocksource/drivers/dw_apb_timer: Inline apbt_readl and apbt_writel

Daniel Lezcano
2015-12-18T14:24:37Z

From: Jisheng Zhang <jszhang@marvell.com>

It seems gcc can automatically inline apbt_writel() for us, but
apbt_real isn't inlined. This patch makes them inline to get a trivial
performance improvement: 4096 rounds of __apbt_read_clocksource() call
spend time on Marvell BG4CT platform:

before the patch 1275240ns on average
after the patch 1263240ns on average

so we get 1% performance improvement.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/dw_apb_timer.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clocksource/dw_apb_timer.c b/drivers/clocksource/dw_apb_timer.c
index 7f95b53..6334526 100644
--- a/drivers/clocksource/dw_apb_timer.c
+++ b/drivers/clocksource/dw_apb_timer.c
@@ -49,13 +49,13 @@ clocksource_to_dw_apb_clocksource(struct clocksource *cs)
return container_of(cs, struct dw_apb_clocksource, cs);
}

-static u32 apbt_readl(struct dw_apb_timer *timer, unsigned long offs)
+static inline u32 apbt_readl(struct dw_apb_timer *timer, unsigned long offs)
{
return readl(timer->base + offs);
}

-static void apbt_writel(struct dw_apb_timer *timer, u32 val,
- unsigned long offs)
+static inline void apbt_writel(struct dw_apb_timer *timer, u32 val,
+ unsigned long offs)
{
writel(val, timer->base + offs);
}
--
1.9.1