Update SPLAT to use kmutex_t for portability

For consistency throughout the code update the SPLAT infrastructure
to use the wrapped mutex interfaces.

Signed-off-by: Brian Behlendorf <[email protected]>

3 files changed, 26 insertions, 21 deletions

diff --git a/module/splat/splat-atomic.c b/module/splat/splat-atomic.c
index f702196be..7a1bd859d 100644
--- a/module/splat/splat-atomic.c
+++ b/module/splat/splat-atomic.c
@@ -26,6 +26,7 @@
 
 #include <sys/atomic.h>
 #include <sys/thread.h>
+#include <sys/mutex.h>
 #include <linux/slab.h>
 #include "splat-internal.h"
 
@@ -52,7 +53,7 @@ typedef enum {
 typedef struct atomic_priv {
         unsigned long ap_magic;
         struct file *ap_file;
-	struct mutex ap_lock;
+	kmutex_t ap_lock;
         wait_queue_head_t ap_waitq;
 	volatile uint64_t ap_atomic;
 	volatile uint64_t ap_atomic_exited;
@@ -70,10 +71,10 @@ splat_atomic_work(void *priv)
 	ap = (atomic_priv_t *)priv;
 	ASSERT(ap->ap_magic == SPLAT_ATOMIC_TEST_MAGIC);
 
-	mutex_lock(&ap->ap_lock);
+	mutex_enter(&ap->ap_lock);
 	op = ap->ap_op;
 	wake_up(&ap->ap_waitq);
-	mutex_unlock(&ap->ap_lock);
+	mutex_exit(&ap->ap_lock);
 
         splat_vprint(ap->ap_file, SPLAT_ATOMIC_TEST1_NAME,
 	             "Thread %d successfully started: %lu/%lu\n", op,
@@ -143,13 +144,13 @@ splat_atomic_test1(struct file *file, void *arg)
 
 	ap.ap_magic = SPLAT_ATOMIC_TEST_MAGIC;
 	ap.ap_file = file;
-	mutex_init(&ap.ap_lock);
+	mutex_init(&ap.ap_lock, SPLAT_ATOMIC_TEST1_NAME, NULL, NULL);
 	init_waitqueue_head(&ap.ap_waitq);
 	ap.ap_atomic = SPLAT_ATOMIC_INIT_VALUE;
 	ap.ap_atomic_exited = 0;
 
 	for (i = 0; i < SPLAT_ATOMIC_COUNT_64; i++) {
-		mutex_lock(&ap.ap_lock);
+		mutex_enter(&ap.ap_lock);
 		ap.ap_op = i;
 
 		thr = (kthread_t *)thread_create(NULL, 0, splat_atomic_work,
@@ -157,14 +158,14 @@ splat_atomic_test1(struct file *file, void *arg)
 						 minclsyspri);
 		if (thr == NULL) {
 			rc = -ESRCH;
-			mutex_unlock(&ap.ap_lock);
+			mutex_exit(&ap.ap_lock);
 			break;
 		}
 
 		/* Prepare to wait, the new thread will wake us once it
 		 * has made a copy of the unique private passed data */
                 prepare_to_wait(&ap.ap_waitq, &wait, TASK_UNINTERRUPTIBLE);
-		mutex_unlock(&ap.ap_lock);
+		mutex_exit(&ap.ap_lock);
 		schedule();
 	}
 
@@ -187,6 +188,8 @@ splat_atomic_test1(struct file *file, void *arg)
 	           "Success initial and final values match, %lu == %lu\n",
 	           (long unsigned)ap.ap_atomic, SPLAT_ATOMIC_INIT_VALUE);
 
+	mutex_destroy(&ap.ap_lock);
+
 	return 0;
 }
 
diff --git a/module/splat/splat-ctl.c b/module/splat/splat-ctl.c
index c4337a9f5..4048e0817 100644
--- a/module/splat/splat-ctl.c
+++ b/module/splat/splat-ctl.c
@@ -51,6 +51,7 @@
 #include <linux/uaccess.h>
 #include <sys/types.h>
 #include <sys/debug.h>
+#include <sys/mutex.h>
 #include "splat-internal.h"
 
 static spl_class *splat_class;
@@ -71,7 +72,7 @@ splat_open(struct inode *inode, struct file *file)
 	if (info == NULL)
 		return -ENOMEM;
 
-	mutex_init(&info->info_lock);
+	mutex_init(&info->info_lock, SPLAT_NAME, MUTEX_DEFAULT, NULL);
 	info->info_size = SPLAT_INFO_BUFFER_SIZE;
 	info->info_buffer = (char *)vmalloc(SPLAT_INFO_BUFFER_SIZE);
 	if (info->info_buffer == NULL) {
@@ -115,10 +116,10 @@ splat_buffer_clear(struct file *file, splat_cfg_t *kcfg, unsigned long arg)
 	ASSERT(info);
 	ASSERT(info->info_buffer);
 
-	mutex_lock(&info->info_lock);
+	mutex_enter(&info->info_lock);
 	memset(info->info_buffer, 0, info->info_size);
 	info->info_head = info->info_buffer;
-	mutex_unlock(&info->info_lock);
+	mutex_exit(&info->info_lock);
 
 	return 0;
 }
@@ -133,7 +134,7 @@ splat_buffer_size(struct file *file, splat_cfg_t *kcfg, unsigned long arg)
 	ASSERT(info);
 	ASSERT(info->info_buffer);
 
-	mutex_lock(&info->info_lock);
+	mutex_enter(&info->info_lock);
 	if (kcfg->cfg_arg1 > 0) {
 
 		size = kcfg->cfg_arg1;
@@ -158,7 +159,7 @@ splat_buffer_size(struct file *file, splat_cfg_t *kcfg, unsigned long arg)
 	if (copy_to_user((struct splat_cfg_t __user *)arg, kcfg, sizeof(*kcfg)))
 		rc = -EFAULT;
 out:
-	mutex_unlock(&info->info_lock);
+	mutex_exit(&info->info_lock);
 
 	return rc;
 }
@@ -509,7 +510,7 @@ static ssize_t splat_write(struct file *file, const char __user *buf,
 	ASSERT(info);
 	ASSERT(info->info_buffer);
 
-	mutex_lock(&info->info_lock);
+	mutex_enter(&info->info_lock);
 
 	/* Write beyond EOF */
 	if (*ppos >= info->info_size) {
@@ -529,7 +530,7 @@ static ssize_t splat_write(struct file *file, const char __user *buf,
 	*ppos += count;
 	rc = count;
 out:
-	mutex_unlock(&info->info_lock);
+	mutex_exit(&info->info_lock);
 	return rc;
 }
 
@@ -546,7 +547,7 @@ static ssize_t splat_read(struct file *file, char __user *buf,
 	ASSERT(info);
 	ASSERT(info->info_buffer);
 
-	mutex_lock(&info->info_lock);
+	mutex_enter(&info->info_lock);
 
 	/* Read beyond EOF */
 	if (*ppos >= info->info_size)
@@ -564,7 +565,7 @@ static ssize_t splat_read(struct file *file, char __user *buf,
 	*ppos += count;
 	rc = count;
 out:
-	mutex_unlock(&info->info_lock);
+	mutex_exit(&info->info_lock);
 	return rc;
 }
 
@@ -580,7 +581,7 @@ static loff_t splat_seek(struct file *file, loff_t offset, int origin)
 	ASSERT(info);
 	ASSERT(info->info_buffer);
 
-	mutex_lock(&info->info_lock);
+	mutex_enter(&info->info_lock);
 
 	switch (origin) {
 	case 0: /* SEEK_SET - No-op just do it */
@@ -599,7 +600,7 @@ static loff_t splat_seek(struct file *file, loff_t offset, int origin)
 		rc = offset;
 	}
 
-	mutex_unlock(&info->info_lock);
+	mutex_exit(&info->info_lock);
 
 	return rc;
 }
diff --git a/module/splat/splat-internal.h b/module/splat/splat-internal.h
index b138196f5..2ff19541b 100644
--- a/module/splat/splat-internal.h
+++ b/module/splat/splat-internal.h
@@ -28,6 +28,7 @@
 #include "spl-device.h"
 #include "spl-debug.h"
 #include "splat-ctl.h"
+#include <sys/mutex.h>
 
 #define SPLAT_SUBSYSTEM_INIT(type)                                      \
 ({      splat_subsystem_t *_sub_;                                       \
@@ -121,7 +122,7 @@ typedef struct splat_subsystem {
 #define SPLAT_INFO_BUFFER_REDZONE	256
 
 typedef struct splat_info {
-	struct mutex info_lock;
+	kmutex_t info_lock;
 	int info_size;
 	char *info_buffer;
 	char *info_head;	/* Internal kernel use only */
@@ -136,7 +137,7 @@ typedef struct splat_info {
 	ASSERT(_info_);							\
 	ASSERT(_info_->info_buffer);					\
 									\
-	mutex_lock(&_info_->info_lock);					\
+	mutex_enter(&_info_->info_lock);				\
 									\
 	/* Don't allow the kernel to start a write in the red zone */	\
 	if ((int)(_info_->info_head - _info_->info_buffer) >		\
@@ -148,7 +149,7 @@ typedef struct splat_info {
 			_info_->info_head += _rc_;			\
 	}								\
 									\
-	mutex_unlock(&_info_->info_lock);				\
+	mutex_exit(&_info_->info_lock);					\
 	_rc_;								\
 })