[ARM] Convert some arm semaphores to mutexes

The arm clock semaphores are strict mutexes, convert them to the new
mutex implementation

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

9 files changed, 67 insertions, 58 deletions

diff --git a/arch/arm/common/rtctime.c b/arch/arm/common/rtctime.c
index 72b03f201eb9..00f6278f42b8 100644
--- a/arch/arm/common/rtctime.c
+++ b/arch/arm/common/rtctime.c
@@ -18,6 +18,7 @@
 #include <linux/miscdevice.h>
 #include <linux/spinlock.h>
 #include <linux/device.h>
+#include <linux/mutex.h>
 
 #include <asm/rtc.h>
 #include <asm/semaphore.h>
@@ -34,7 +35,7 @@ static unsigned long rtc_irq_data;
 /*
  * rtc_sem protects rtc_inuse and rtc_ops
  */
-static DECLARE_MUTEX(rtc_sem);
+static DEFINE_MUTEX(rtc_mutex);
 static unsigned long rtc_inuse;
 static struct rtc_ops *rtc_ops;
 
@@ -355,7 +356,7 @@ static int rtc_open(struct inode *inode, struct file *file)
 {
         int ret;
 
-        down(&rtc_sem);
+        mutex_lock(&rtc_mutex);
 
         if (rtc_inuse) {
                 ret = -EBUSY;
@@ -373,7 +374,7 @@ static int rtc_open(struct inode *inode, struct file *file)
                         rtc_inuse = 1;
                 }
         }
-        up(&rtc_sem);
+        mutex_unlock(&rtc_mutex);
 
         return ret;
 }
@@ -479,7 +480,7 @@ int register_rtc(struct rtc_ops *ops)
 {
         int ret = -EBUSY;
 
-        down(&rtc_sem);
+        mutex_lock(&rtc_mutex);
         if (rtc_ops == NULL) {
                 rtc_ops = ops;
 
@@ -488,7 +489,7 @@ int register_rtc(struct rtc_ops *ops)
                         create_proc_read_entry("driver/rtc", 0, NULL,
                                                rtc_read_proc, ops);
         }
-        up(&rtc_sem);
+        mutex_unlock(&rtc_mutex);
 
         return ret;
 }
@@ -496,12 +497,12 @@ EXPORT_SYMBOL(register_rtc);
 
 void unregister_rtc(struct rtc_ops *rtc)
 {
-        down(&rtc_sem);
+        mutex_lock(&rtc_mutex);
         if (rtc == rtc_ops) {
                 remove_proc_entry("driver/rtc", NULL);
                 misc_deregister(&rtc_miscdev);
                 rtc_ops = NULL;
         }
-        up(&rtc_sem);
+        mutex_unlock(&rtc_mutex);
 }
 EXPORT_SYMBOL(unregister_rtc);
diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
index dceb826bd216..96fd91926c9b 100644
--- a/arch/arm/kernel/ecard.c
+++ b/arch/arm/kernel/ecard.c
@@ -40,6 +40,7 @@
 #include <linux/proc_fs.h>
 #include <linux/device.h>
 #include <linux/init.h>
+#include <linux/mutex.h>
 
 #include <asm/dma.h>
 #include <asm/ecard.h>
@@ -206,7 +207,7 @@ static void ecard_task_readbytes(struct ecard_request *req)
 
 static DECLARE_WAIT_QUEUE_HEAD(ecard_wait);
 static struct ecard_request *ecard_req;
-static DECLARE_MUTEX(ecard_sem);
+static DEFINE_MUTEX(ecard_mutex);
 
 /*
  * Set up the expansion card daemon's page tables.
@@ -299,7 +300,7 @@ static void ecard_call(struct ecard_request *req)
 
         req->complete = &completion;
 
-        down(&ecard_sem);
+        mutex_lock(&ecard_mutex);
         ecard_req = req;
         wake_up(&ecard_wait);
 
@@ -307,7 +308,7 @@ static void ecard_call(struct ecard_request *req)
          * Now wait for kecardd to run.
          */
         wait_for_completion(&completion);
-        up(&ecard_sem);
+        mutex_unlock(&ecard_mutex);
 }
 
 /* ======================= Mid-level card control ===================== */
diff --git a/arch/arm/mach-aaec2000/clock.c b/arch/arm/mach-aaec2000/clock.c
index 1c84c60941e1..74aa7a39bb68 100644
--- a/arch/arm/mach-aaec2000/clock.c
+++ b/arch/arm/mach-aaec2000/clock.c
@@ -16,26 +16,27 @@
 #include <linux/err.h>
 #include <linux/string.h>
 #include <linux/clk.h>
+#include <linux/mutex.h>
 
 #include <asm/semaphore.h>
 
 #include "clock.h"
 
 static LIST_HEAD(clocks);
-static DECLARE_MUTEX(clocks_sem);
+static DEFINE_MUTEX(clocks_mutex);
 
 struct clk *clk_get(struct device *dev, const char *id)
 {
         struct clk *p, *clk = ERR_PTR(-ENOENT);
 
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_for_each_entry(p, &clocks, node) {
                 if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
                         clk = p;
                         break;
                 }
         }
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 
         return clk;
 }
@@ -78,18 +79,18 @@ EXPORT_SYMBOL(clk_set_rate);
 
 int clk_register(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_add(&clk->node, &clocks);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
         return 0;
 }
 EXPORT_SYMBOL(clk_register);
 
 void clk_unregister(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_del(&clk->node);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 }
 EXPORT_SYMBOL(clk_unregister);
 
diff --git a/arch/arm/mach-integrator/clock.c b/arch/arm/mach-integrator/clock.c
index 40684e01e865..95a1e263f7fa 100644
--- a/arch/arm/mach-integrator/clock.c
+++ b/arch/arm/mach-integrator/clock.c
@@ -15,6 +15,7 @@
 #include <linux/err.h>
 #include <linux/string.h>
 #include <linux/clk.h>
+#include <linux/mutex.h>
 
 #include <asm/semaphore.h>
 #include <asm/hardware/icst525.h>
@@ -22,20 +23,20 @@
 #include "clock.h"
 
 static LIST_HEAD(clocks);
-static DECLARE_MUTEX(clocks_sem);
+static DEFINE_MUTEX(clocks_mutex);
 
 struct clk *clk_get(struct device *dev, const char *id)
 {
         struct clk *p, *clk = ERR_PTR(-ENOENT);
 
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_for_each_entry(p, &clocks, node) {
                 if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
                         clk = p;
                         break;
                 }
         }
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 
         return clk;
 }
@@ -107,18 +108,18 @@ static struct clk uart_clk = {
 
 int clk_register(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_add(&clk->node, &clocks);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
         return 0;
 }
 EXPORT_SYMBOL(clk_register);
 
 void clk_unregister(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_del(&clk->node);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 }
 EXPORT_SYMBOL(clk_unregister);
 
diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c
index a68b30eff4d2..93096befd017 100644
--- a/arch/arm/mach-pxa/ssp.c
+++ b/arch/arm/mach-pxa/ssp.c
@@ -31,6 +31,7 @@
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
+#include <linux/mutex.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/hardware.h>
@@ -59,7 +60,7 @@ static const struct ssp_info_ ssp_info[PXA_SSP_PORTS] = {
 #endif
 };
 
-static DECLARE_MUTEX(sem);
+static DEFINE_MUTEX(mutex);
 static int use_count[PXA_SSP_PORTS] = {0, 0, 0};
 
 static irqreturn_t ssp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
@@ -239,16 +240,16 @@ int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags)
         if (port > PXA_SSP_PORTS || port == 0)
                 return -ENODEV;
 
-        down(&sem);
+        mutex_lock(&mutex);
         if (use_count[port - 1]) {
-                up(&sem);
+                mutex_unlock(&mutex);
                 return -EBUSY;
         }
         use_count[port - 1]++;
 
         if (!request_mem_region(__PREG(SSCR0_P(port)), 0x2c, "SSP")) {
                 use_count[port - 1]--;
-                up(&sem);
+                mutex_unlock(&mutex);
                 return -EBUSY;
         }
         dev->port = port;
@@ -265,13 +266,13 @@ int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags)
 
         /* turn on SSP port clock */
         pxa_set_cken(ssp_info[port-1].clock, 1);
-        up(&sem);
+        mutex_unlock(&mutex);
         return 0;
 
 out_region:
         release_mem_region(__PREG(SSCR0_P(port)), 0x2c);
         use_count[port - 1]--;
-        up(&sem);
+        mutex_unlock(&mutex);
         return ret;
 }
 
@@ -282,7 +283,7 @@ out_region:
  */
 void ssp_exit(struct ssp_dev *dev)
 {
-        down(&sem);
+        mutex_lock(&mutex);
         SSCR0_P(dev->port) &= ~SSCR0_SSE;
 
         if (dev->port > PXA_SSP_PORTS || dev->port == 0) {
@@ -295,7 +296,7 @@ void ssp_exit(struct ssp_dev *dev)
                 free_irq(dev->irq, dev);
         release_mem_region(__PREG(SSCR0_P(dev->port)), 0x2c);
         use_count[dev->port - 1]--;
-        up(&sem);
+        mutex_unlock(&mutex);
 }
 
 EXPORT_SYMBOL(ssp_write_word);
diff --git a/arch/arm/mach-realview/clock.c b/arch/arm/mach-realview/clock.c
index ec3f7e798623..21325a4da9da 100644
--- a/arch/arm/mach-realview/clock.c
+++ b/arch/arm/mach-realview/clock.c
@@ -14,6 +14,7 @@
 #include <linux/errno.h>
 #include <linux/err.h>
 #include <linux/clk.h>
+#include <linux/mutex.h>
 
 #include <asm/semaphore.h>
 #include <asm/hardware/icst307.h>
@@ -21,20 +22,20 @@
 #include "clock.h"
 
 static LIST_HEAD(clocks);
-static DECLARE_MUTEX(clocks_sem);
+static DEFINE_MUTEX(clocks_mutex);
 
 struct clk *clk_get(struct device *dev, const char *id)
 {
         struct clk *p, *clk = ERR_PTR(-ENOENT);
 
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_for_each_entry(p, &clocks, node) {
                 if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
                         clk = p;
                         break;
                 }
         }
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 
         return clk;
 }
@@ -109,18 +110,18 @@ static struct clk mmci_clk = {
 
 int clk_register(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_add(&clk->node, &clocks);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
         return 0;
 }
 EXPORT_SYMBOL(clk_register);
 
 void clk_unregister(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_del(&clk->node);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 }
 EXPORT_SYMBOL(clk_unregister);
 
diff --git a/arch/arm/mach-s3c2410/clock.c b/arch/arm/mach-s3c2410/clock.c
index fc09ba92d66a..af2f3d52b61b 100644
--- a/arch/arm/mach-s3c2410/clock.c
+++ b/arch/arm/mach-s3c2410/clock.c
@@ -37,6 +37,7 @@
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/clk.h>
+#include <linux/mutex.h>
 
 #include <asm/hardware.h>
 #include <asm/atomic.h>
@@ -51,7 +52,7 @@
 /* clock information */
 
 static LIST_HEAD(clocks);
-static DECLARE_MUTEX(clocks_sem);
+static DEFINE_MUTEX(clocks_mutex);
 
 /* old functions */
 
@@ -102,7 +103,7 @@ struct clk *clk_get(struct device *dev, const char *id)
         else
                 idno = to_platform_device(dev)->id;
 
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
 
         list_for_each_entry(p, &clocks, list) {
                 if (p->id == idno &&
@@ -126,7 +127,7 @@ struct clk *clk_get(struct device *dev, const char *id)
                 }
         }
 
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
         return clk;
 }
 
@@ -362,9 +363,9 @@ int s3c24xx_register_clock(struct clk *clk)
 
         /* add to the list of available clocks */
 
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_add(&clk->list, &clocks);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 
         return 0;
 }
diff --git a/arch/arm/mach-versatile/clock.c b/arch/arm/mach-versatile/clock.c
index dcf10014f5cd..9858c96560e2 100644
--- a/arch/arm/mach-versatile/clock.c
+++ b/arch/arm/mach-versatile/clock.c
@@ -15,6 +15,7 @@
 #include <linux/err.h>
 #include <linux/string.h>
 #include <linux/clk.h>
+#include <linux/mutex.h>
 
 #include <asm/semaphore.h>
 #include <asm/hardware/icst307.h>
@@ -22,20 +23,20 @@
 #include "clock.h"
 
 static LIST_HEAD(clocks);
-static DECLARE_MUTEX(clocks_sem);
+static DEFINE_MUTEX(clocks_mutex);
 
 struct clk *clk_get(struct device *dev, const char *id)
 {
         struct clk *p, *clk = ERR_PTR(-ENOENT);
 
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_for_each_entry(p, &clocks, node) {
                 if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
                         clk = p;
                         break;
                 }
         }
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 
         return clk;
 }
@@ -110,18 +111,18 @@ static struct clk mmci_clk = {
 
 int clk_register(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_add(&clk->node, &clocks);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
         return 0;
 }
 EXPORT_SYMBOL(clk_register);
 
 void clk_unregister(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_del(&clk->node);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 }
 EXPORT_SYMBOL(clk_unregister);
 
diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index 84fd65656fcf..7ebc5a29db8d 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -20,6 +20,7 @@
 #include <linux/err.h>
 #include <linux/string.h>
 #include <linux/clk.h>
+#include <linux/mutex.h>
 
 #include <asm/io.h>
 #include <asm/semaphore.h>
@@ -27,7 +28,7 @@
 #include <asm/arch/clock.h>
 
 LIST_HEAD(clocks);
-static DECLARE_MUTEX(clocks_sem);
+static DEFINE_MUTEX(clocks_mutex);
 DEFINE_SPINLOCK(clockfw_lock);
 
 static struct clk_functions *arch_clock;
@@ -40,14 +41,14 @@ struct clk * clk_get(struct device *dev, const char *id)
 {
         struct clk *p, *clk = ERR_PTR(-ENOENT);
 
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_for_each_entry(p, &clocks, node) {
                 if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
                         clk = p;
                         break;
                 }
         }
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 
         return clk;
 }
@@ -249,11 +250,11 @@ void propagate_rate(struct clk * tclk)
 
 int clk_register(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_add(&clk->node, &clocks);
         if (clk->init)
                 clk->init(clk);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 
         return 0;
 }
@@ -261,9 +262,9 @@ EXPORT_SYMBOL(clk_register);
 
 void clk_unregister(struct clk *clk)
 {
-        down(&clocks_sem);
+        mutex_lock(&clocks_mutex);
         list_del(&clk->node);
-        up(&clocks_sem);
+        mutex_unlock(&clocks_mutex);
 }
 EXPORT_SYMBOL(clk_unregister);