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MIPS: Lemote 2F: cs5536: mfgpt: use raw locks

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The lock is taken in the raw irq path and therefore a rawlock should be
used instead of a normal spinlock.
While here I drop the export symbol on that variable since there are no
other users.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: Hua Yan <yanh@lemote.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Hongliang Tao <taohl@lemote.com>
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6936/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Sebastian Andrzej Siewior
2014-05-13 17:07:04 +02:00
committed by Ralf Baechle
parent bb6c0bd3fd
commit f02ffb199d
1 changed files with 5 additions and 6 deletions
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11
arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
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@@ -27,8 +27,7 @@
#include <cs5536/cs5536_mfgpt.h> #include <cs5536/cs5536_mfgpt.h>
DEFINE_SPINLOCK(mfgpt_lock); static DEFINE_RAW_SPINLOCK(mfgpt_lock);
EXPORT_SYMBOL(mfgpt_lock);
static u32 mfgpt_base; static u32 mfgpt_base;
@@ -55,7 +54,7 @@ EXPORT_SYMBOL(enable_mfgpt0_counter);
static void init_mfgpt_timer(enum clock_event_mode mode, static void init_mfgpt_timer(enum clock_event_mode mode,
struct clock_event_device *evt) struct clock_event_device *evt)
{ {
spin_lock(&mfgpt_lock); raw_spin_lock(&mfgpt_lock);
switch (mode) { switch (mode) {
case CLOCK_EVT_MODE_PERIODIC: case CLOCK_EVT_MODE_PERIODIC:
@@ -79,7 +78,7 @@ static void init_mfgpt_timer(enum clock_event_mode mode,
/* Nothing to do here */ /* Nothing to do here */
break; break;
} }
spin_unlock(&mfgpt_lock); raw_spin_unlock(&mfgpt_lock);
} }
static struct clock_event_device mfgpt_clockevent = { static struct clock_event_device mfgpt_clockevent = {
@@ -157,7 +156,7 @@ static cycle_t mfgpt_read(struct clocksource *cs)
static int old_count; static int old_count;
static u32 old_jifs; static u32 old_jifs;
spin_lock_irqsave(&mfgpt_lock, flags); raw_spin_lock_irqsave(&mfgpt_lock, flags);
/* /*
* Although our caller may have the read side of xtime_lock, * Although our caller may have the read side of xtime_lock,
* this is now a seqlock, and we are cheating in this routine * this is now a seqlock, and we are cheating in this routine
@@ -191,7 +190,7 @@ static cycle_t mfgpt_read(struct clocksource *cs)
old_count = count; old_count = count;
old_jifs = jifs; old_jifs = jifs;
spin_unlock_irqrestore(&mfgpt_lock, flags); raw_spin_unlock_irqrestore(&mfgpt_lock, flags);
return (cycle_t) (jifs * COMPARE) + count; return (cycle_t) (jifs * COMPARE) + count;
} }