9 files changed, 90 insertions, 54 deletions

diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 4bb023f4c869..f1d2cdc5331b 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -23,3 +23,4 @@ obj-$(CONFIG_SMP)	+= locks.o
 endif
 
 obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o
+obj-$(CONFIG_HAS_IOMEM) += devres.o
diff --git a/arch/powerpc/lib/devres.c b/arch/powerpc/lib/devres.c
new file mode 100644
index 000000000000..292115d98ea9
--- /dev/null
+++ b/arch/powerpc/lib/devres.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/device.h>       /* devres_*(), devm_ioremap_release() */
+#include <linux/io.h>           /* ioremap_flags() */
+#include <linux/module.h>       /* EXPORT_SYMBOL() */
+
+/**
+ * devm_ioremap_prot - Managed ioremap_flags()
+ * @dev: Generic device to remap IO address for
+ * @offset: BUS offset to map
+ * @size: Size of map
+ * @flags: Page flags
+ *
+ * Managed ioremap_prot().  Map is automatically unmapped on driver
+ * detach.
+ */
+void __iomem *devm_ioremap_prot(struct device *dev, resource_size_t offset,
+                                 size_t size, unsigned long flags)
+{
+        void __iomem **ptr, *addr;
+
+        ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
+        if (!ptr)
+                return NULL;
+
+        addr = ioremap_flags(offset, size, flags);
+        if (addr) {
+                *ptr = addr;
+                devres_add(dev, ptr);
+        } else
+                devres_free(ptr);
+
+        return addr;
+}
+EXPORT_SYMBOL(devm_ioremap_prot);
diff --git a/arch/powerpc/platforms/pseries/scanlog.c b/arch/powerpc/platforms/pseries/scanlog.c
index bec3803f0618..417eca79df69 100644
--- a/arch/powerpc/platforms/pseries/scanlog.c
+++ b/arch/powerpc/platforms/pseries/scanlog.c
@@ -55,11 +55,6 @@ static ssize_t scanlog_read(struct file *file, char __user *buf,
         dp = PDE(inode);
         data = (unsigned int *)dp->data;
 
-        if (!data) {
-                printk(KERN_ERR "scanlog: read failed no data\n");
-                return -EIO;
-        }
-
         if (count > RTAS_DATA_BUF_SIZE)
                 count = RTAS_DATA_BUF_SIZE;
 
@@ -146,11 +141,6 @@ static int scanlog_open(struct inode * inode, struct file * file)
         struct proc_dir_entry *dp = PDE(inode);
         unsigned int *data = (unsigned int *)dp->data;
 
-        if (!data) {
-                printk(KERN_ERR "scanlog: open failed no data\n");
-                return -EIO;
-        }
-
         if (data[0] != 0) {
                 /* This imperfect test stops a second copy of the
                  * data (or a reset while data is being copied)
@@ -168,10 +158,6 @@ static int scanlog_release(struct inode * inode, struct file * file)
         struct proc_dir_entry *dp = PDE(inode);
         unsigned int *data = (unsigned int *)dp->data;
 
-        if (!data) {
-                printk(KERN_ERR "scanlog: release failed no data\n");
-                return -EIO;
-        }
         data[0] = 0;
 
         return 0;
@@ -200,12 +186,11 @@ static int __init scanlog_init(void)
         if (!data)
                 goto err;
 
-        ent = proc_create("ppc64/rtas/scan-log-dump", S_IRUSR, NULL,
-                          &scanlog_fops);
+        ent = proc_create_data("ppc64/rtas/scan-log-dump", S_IRUSR, NULL,
+                               &scanlog_fops, data);
         if (!ent)
                 goto err;
 
-        ent->data = data;
         proc_ppc64_scan_log_dump = ent;
 
         return 0;
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 20978205cd02..b8b9e44f7f4e 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -37,7 +37,7 @@
 #include <linux/device.h>
 #include <linux/kthread.h>
 #include <linux/platform_device.h>
-#include <linux/semaphore.h>
+#include <linux/mutex.h>
 
 #include <asm/uaccess.h>
 #ifdef CONFIG_PPC
@@ -102,7 +102,7 @@ static struct adb_handler {
 } adb_handler[16];
 
 /*
- * The adb_handler_sem mutex protects all accesses to the original_address
+ * The adb_handler_mutex mutex protects all accesses to the original_address
  * and handler_id fields of adb_handler[i] for all i, and changes to the
  * handler field.
  * Accesses to the handler field are protected by the adb_handler_lock
@@ -110,7 +110,7 @@ static struct adb_handler {
  * time adb_unregister returns, we know that the old handler isn't being
  * called.
  */
-static DECLARE_MUTEX(adb_handler_sem);
+static DEFINE_MUTEX(adb_handler_mutex);
 static DEFINE_RWLOCK(adb_handler_lock);
 
 #if 0
@@ -355,7 +355,7 @@ do_adb_reset_bus(void)
                 msleep(500);
         }
 
-        down(&adb_handler_sem);
+        mutex_lock(&adb_handler_mutex);
         write_lock_irq(&adb_handler_lock);
         memset(adb_handler, 0, sizeof(adb_handler));
         write_unlock_irq(&adb_handler_lock);
@@ -376,7 +376,7 @@ do_adb_reset_bus(void)
                 if (adb_controller->autopoll)
                         adb_controller->autopoll(autopoll_devs);
         }
-        up(&adb_handler_sem);
+        mutex_unlock(&adb_handler_mutex);
 
         blocking_notifier_call_chain(&adb_client_list,
                 ADB_MSG_POST_RESET, NULL);
@@ -454,7 +454,7 @@ adb_register(int default_id, int handler_id, struct adb_ids *ids,
 {
         int i;
 
-        down(&adb_handler_sem);
+        mutex_lock(&adb_handler_mutex);
         ids->nids = 0;
         for (i = 1; i < 16; i++) {
                 if ((adb_handler[i].original_address == default_id) &&
@@ -472,7 +472,7 @@ adb_register(int default_id, int handler_id, struct adb_ids *ids,
                         ids->id[ids->nids++] = i;
                 }
         }
-        up(&adb_handler_sem);
+        mutex_unlock(&adb_handler_mutex);
         return ids->nids;
 }
 
@@ -481,7 +481,7 @@ adb_unregister(int index)
 {
         int ret = -ENODEV;
 
-        down(&adb_handler_sem);
+        mutex_lock(&adb_handler_mutex);
         write_lock_irq(&adb_handler_lock);
         if (adb_handler[index].handler) {
                 while(adb_handler[index].busy) {
@@ -493,7 +493,7 @@ adb_unregister(int index)
                 adb_handler[index].handler = NULL;
         }
         write_unlock_irq(&adb_handler_lock);
-        up(&adb_handler_sem);
+        mutex_unlock(&adb_handler_mutex);
         return ret;
 }
 
@@ -557,19 +557,19 @@ adb_try_handler_change(int address, int new_id)
 {
         int ret;
 
-        down(&adb_handler_sem);
+        mutex_lock(&adb_handler_mutex);
         ret = try_handler_change(address, new_id);
-        up(&adb_handler_sem);
+        mutex_unlock(&adb_handler_mutex);
         return ret;
 }
 
 int
 adb_get_infos(int address, int *original_address, int *handler_id)
 {
-        down(&adb_handler_sem);
+        mutex_lock(&adb_handler_mutex);
         *original_address = adb_handler[address].original_address;
         *handler_id = adb_handler[address].handler_id;
-        up(&adb_handler_sem);
+        mutex_unlock(&adb_handler_mutex);
 
         return (*original_address != 0);
 }
@@ -628,10 +628,10 @@ do_adb_query(struct adb_request *req)
         case ADB_QUERY_GETDEVINFO:
                 if (req->nbytes < 3)
                         break;
-                down(&adb_handler_sem);
+                mutex_lock(&adb_handler_mutex);
                 req->reply[0] = adb_handler[req->data[2]].original_address;
                 req->reply[1] = adb_handler[req->data[2]].handler_id;
-                up(&adb_handler_sem);
+                mutex_unlock(&adb_handler_mutex);
                 req->complete = 1;
                 req->reply_len = 2;
                 adb_write_done(req);
diff --git a/drivers/macintosh/therm_pm72.c b/drivers/macintosh/therm_pm72.c
index 1e0a69a5e815..ddfb426a9abd 100644
--- a/drivers/macintosh/therm_pm72.c
+++ b/drivers/macintosh/therm_pm72.c
@@ -122,6 +122,7 @@
 #include <linux/kmod.h>
 #include <linux/i2c.h>
 #include <linux/kthread.h>
+#include <linux/mutex.h>
 #include <asm/prom.h>
 #include <asm/machdep.h>
 #include <asm/io.h>
@@ -169,7 +170,7 @@ static int				rackmac;
 static s32                              dimm_output_clamp;
 static int                              fcu_rpm_shift;
 static int                              fcu_tickle_ticks;
-static DECLARE_MUTEX(driver_lock);
+static DEFINE_MUTEX(driver_lock);
 
 /*
  * We have 3 types of CPU PID control. One is "split" old style control
@@ -729,9 +730,9 @@ static void fetch_cpu_pumps_minmax(void)
 static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf)        \
 {                                                               \
         ssize_t r;                                              \
-        down(&driver_lock);                                     \
+        mutex_lock(&driver_lock);                                       \
         r = sprintf(buf, "%d.%03d", FIX32TOPRINT(data));        \
-        up(&driver_lock);                                       \
+        mutex_unlock(&driver_lock);                                     \
         return r;                                               \
 }
 #define BUILD_SHOW_FUNC_INT(name, data)                         \
@@ -1803,11 +1804,11 @@ static int main_control_loop(void *x)
 {
         DBG("main_control_loop started\n");
 
-        down(&driver_lock);
+        mutex_lock(&driver_lock);
 
         if (start_fcu() < 0) {
                 printk(KERN_ERR "kfand: failed to start FCU\n");
-                up(&driver_lock);
+                mutex_unlock(&driver_lock);
                 goto out;
         }
 
@@ -1822,14 +1823,14 @@ static int main_control_loop(void *x)
 
         fcu_tickle_ticks = FCU_TICKLE_TICKS;
 
-        up(&driver_lock);
+        mutex_unlock(&driver_lock);
 
         while (state == state_attached) {
                 unsigned long elapsed, start;
 
                 start = jiffies;
 
-                down(&driver_lock);
+                mutex_lock(&driver_lock);
 
                 /* Tickle the FCU just in case */
                 if (--fcu_tickle_ticks < 0) {
@@ -1861,7 +1862,7 @@ static int main_control_loop(void *x)
                         do_monitor_slots(&slots_state);
                 else
                         do_monitor_drives(&drives_state);
-                up(&driver_lock);
+                mutex_unlock(&driver_lock);
 
                 if (critical_state == 1) {
                         printk(KERN_WARNING "Temperature control detected a critical condition\n");
@@ -2019,13 +2020,13 @@ static void detach_fcu(void)
  */
 static int therm_pm72_attach(struct i2c_adapter *adapter)
 {
-        down(&driver_lock);
+        mutex_lock(&driver_lock);
 
         /* Check state */
         if (state == state_detached)
                 state = state_attaching;
         if (state != state_attaching) {
-                up(&driver_lock);
+                mutex_unlock(&driver_lock);
                 return 0;
         }
 
@@ -2054,7 +2055,7 @@ static int therm_pm72_attach(struct i2c_adapter *adapter)
                 state = state_attached;
                 start_control_loops();
         }
-        up(&driver_lock);
+        mutex_unlock(&driver_lock);
 
         return 0;
 }
@@ -2065,16 +2066,16 @@ static int therm_pm72_attach(struct i2c_adapter *adapter)
  */
 static int therm_pm72_detach(struct i2c_adapter *adapter)
 {
-        down(&driver_lock);
+        mutex_lock(&driver_lock);
 
         if (state != state_detached)
                 state = state_detaching;
 
         /* Stop control loops if any */
         DBG("stopping control loops\n");
-        up(&driver_lock);
+        mutex_unlock(&driver_lock);
         stop_control_loops();
-        down(&driver_lock);
+        mutex_lock(&driver_lock);
 
         if (u3_0 != NULL && !strcmp(adapter->name, "u3 0")) {
                 DBG("lost U3-0, disposing control loops\n");
@@ -2090,7 +2091,7 @@ static int therm_pm72_detach(struct i2c_adapter *adapter)
         if (u3_0 == NULL && u3_1 == NULL)
                 state = state_detached;
 
-        up(&driver_lock);
+        mutex_unlock(&driver_lock);
 
         return 0;
 }
diff --git a/drivers/macintosh/windfarm_smu_sat.c b/drivers/macintosh/windfarm_smu_sat.c
index 797918d0e59c..7f2be4baaeda 100644
--- a/drivers/macintosh/windfarm_smu_sat.c
+++ b/drivers/macintosh/windfarm_smu_sat.c
@@ -13,7 +13,7 @@
 #include <linux/init.h>
 #include <linux/wait.h>
 #include <linux/i2c.h>
-#include <linux/semaphore.h>
+#include <linux/mutex.h>
 #include <asm/prom.h>
 #include <asm/smu.h>
 #include <asm/pmac_low_i2c.h>
@@ -36,7 +36,7 @@
 struct wf_sat {
         int                     nr;
         atomic_t                refcnt;
-        struct semaphore        mutex;
+        struct mutex            mutex;
         unsigned long           last_read; /* jiffies when cache last updated */
         u8                      cache[16];
         struct i2c_client       i2c;
@@ -163,7 +163,7 @@ static int wf_sat_get(struct wf_sensor *sr, s32 *value)
         if (sat->i2c.adapter == NULL)
                 return -ENODEV;
 
-        down(&sat->mutex);
+        mutex_lock(&sat->mutex);
         if (time_after(jiffies, (sat->last_read + MAX_AGE))) {
                 err = wf_sat_read_cache(sat);
                 if (err)
@@ -182,7 +182,7 @@ static int wf_sat_get(struct wf_sensor *sr, s32 *value)
         err = 0;
 
  fail:
-        up(&sat->mutex);
+        mutex_unlock(&sat->mutex);
         return err;
 }
 
@@ -233,7 +233,7 @@ static void wf_sat_create(struct i2c_adapter *adapter, struct device_node *dev)
         sat->nr = -1;
         sat->node = of_node_get(dev);
         atomic_set(&sat->refcnt, 0);
-        init_MUTEX(&sat->mutex);
+        mutex_init(&sat->mutex);
         sat->i2c.addr = (addr >> 1) & 0x7f;
         sat->i2c.adapter = adapter;
         sat->i2c.driver = &wf_sat_driver;
diff --git a/include/asm-powerpc/io.h b/include/asm-powerpc/io.h
index afae0697e8ce..e0062d73db1c 100644
--- a/include/asm-powerpc/io.h
+++ b/include/asm-powerpc/io.h
@@ -2,7 +2,7 @@
 #define _ASM_POWERPC_IO_H
 #ifdef __KERNEL__
 
-/* 
+/*
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version
@@ -18,6 +18,9 @@ extern int check_legacy_ioport(unsigned long base_port);
 #define _PNPWRP         0xa79
 #define PNPBIOS_BASE    0xf000
 
+#include <linux/device.h>
+#include <linux/io.h>
+
 #include <linux/compiler.h>
 #include <asm/page.h>
 #include <asm/byteorder.h>
@@ -744,6 +747,9 @@ static inline void * bus_to_virt(unsigned long address)
 
 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
 
+void __iomem *devm_ioremap_prot(struct device *dev, resource_size_t offset,
+                                size_t size, unsigned long flags);
+
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_POWERPC_IO_H */
diff --git a/include/linux/io.h b/include/linux/io.h
index 3a03a3604cce..6c7f0ba0d5fa 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -65,5 +65,6 @@ void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
 void devm_iounmap(struct device *dev, void __iomem *addr);
 int check_signature(const volatile void __iomem *io_addr,
                         const unsigned char *signature, int length);
+void devm_ioremap_release(struct device *dev, void *res);
 
 #endif /* _LINUX_IO_H */
diff --git a/lib/devres.c b/lib/devres.c
index 26c87c49d776..72c8909006da 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -2,7 +2,7 @@
 #include <linux/io.h>
 #include <linux/module.h>
 
-static void devm_ioremap_release(struct device *dev, void *res)
+void devm_ioremap_release(struct device *dev, void *res)
 {
         iounmap(*(void __iomem **)res);
 }