kfifo: move out spinlock

Move the pointer to the spinlock out of struct kfifo.  Most users in
tree do not actually use a spinlock, so the few exceptions now have to
call kfifo_{get,put}_locked, which takes an extra argument to a
spinlock.

Signed-off-by: Stefani Seibold <stefani@seibold.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 12 insertions, 10 deletions

diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 04625a048e74..1538a0a3c0af 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -300,8 +300,9 @@ static void do_sony_laptop_release_key(struct work_struct *work)
 {
         struct sony_laptop_keypress kp;
 
-        while (kfifo_get(&sony_laptop_input.fifo, (unsigned char *)&kp,
-                         sizeof(kp)) == sizeof(kp)) {
+        while (kfifo_get_locked(&sony_laptop_input.fifo, (unsigned char *)&kp,
+                        sizeof(kp), &sony_laptop_input.fifo_lock)
+                        == sizeof(kp)) {
                 msleep(10);
                 input_report_key(kp.dev, kp.key, 0);
                 input_sync(kp.dev);
@@ -362,8 +363,9 @@ static void sony_laptop_report_input_event(u8 event)
                 /* we emit the scancode so we can always remap the key */
                 input_event(kp.dev, EV_MSC, MSC_SCAN, event);
                 input_sync(kp.dev);
-                kfifo_put(&sony_laptop_input.fifo,
-                          (unsigned char *)&kp, sizeof(kp));
+                kfifo_put_locked(&sony_laptop_input.fifo,
+                          (unsigned char *)&kp, sizeof(kp),
+                          &sony_laptop_input.fifo_lock);
 
                 if (!work_pending(&sony_laptop_release_key_work))
                         queue_work(sony_laptop_input.wq,
@@ -386,8 +388,7 @@ static int sony_laptop_setup_input(struct acpi_device *acpi_device)
         /* kfifo */
         spin_lock_init(&sony_laptop_input.fifo_lock);
         error =
-         kfifo_alloc(&sony_laptop_input.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
-                            &sony_laptop_input.fifo_lock);
+         kfifo_alloc(&sony_laptop_input.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL);
         if (error) {
                 printk(KERN_ERR DRV_PFX "kfifo_alloc failed\n");
                 goto err_dec_users;
@@ -2129,7 +2130,8 @@ static ssize_t sonypi_misc_read(struct file *file, char __user *buf,
                 return ret;
 
         while (ret < count &&
-               (kfifo_get(&sonypi_compat.fifo, &c, sizeof(c)) == sizeof(c))) {
+               (kfifo_get_locked(&sonypi_compat.fifo, &c, sizeof(c),
+                          &sonypi_compat.fifo_lock) == sizeof(c))) {
                 if (put_user(c, buf++))
                         return -EFAULT;
                 ret++;
@@ -2308,7 +2310,8 @@ static struct miscdevice sonypi_misc_device = {
 
 static void sonypi_compat_report_event(u8 event)
 {
-        kfifo_put(&sonypi_compat.fifo, (unsigned char *)&event, sizeof(event));
+        kfifo_put_locked(&sonypi_compat.fifo, (unsigned char *)&event,
+                        sizeof(event), &sonypi_compat.fifo_lock);
         kill_fasync(&sonypi_compat.fifo_async, SIGIO, POLL_IN);
         wake_up_interruptible(&sonypi_compat.fifo_proc_list);
 }
@@ -2319,8 +2322,7 @@ static int sonypi_compat_init(void)
 
         spin_lock_init(&sonypi_compat.fifo_lock);
         error =
-         kfifo_alloc(&sonypi_compat.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL,
-                                         &sonypi_compat.fifo_lock);
+         kfifo_alloc(&sonypi_compat.fifo, SONY_LAPTOP_BUF_SIZE, GFP_KERNEL);
         if (error) {
                 printk(KERN_ERR DRV_PFX "kfifo_alloc failed\n");
                 return error;