[patch] sound: remove BKL from sound/core/info.c

[patch] sound: remove BKL from sound/core/info.c

[Ingo Molnar]

remove the final instance of BKL use within the sound code, by converting
snd_info_entry_ioctl to an unlocked ioctl. It is obviously safe, because
the sound code already dropped the BKL in this function.

built and booted on x86.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

----

 sound/core/info.c |   33 +++++++++++----------------------
 1 files changed, 11 insertions(+), 22 deletions(-)

Index: linux/sound/core/info.c
===================================================================
--- linux.orig/sound/core/info.c
+++ linux/sound/core/info.c
@@ -444,8 +444,8 @@ static unsigned int snd_info_entry_poll(
 	return mask;
 }
 
-static inline int _snd_info_entry_ioctl(struct inode *inode, struct file *file,
-					unsigned int cmd, unsigned long arg)
+static long snd_info_entry_ioctl(struct file *file, unsigned int cmd,
+				unsigned long arg)
 {
 	struct snd_info_private_data *data;
 	struct snd_info_entry *entry;
@@ -465,17 +465,6 @@ static inline int _snd_info_entry_ioctl(
 	return -ENOTTY;
 }
 
-/* FIXME: need to unlock BKL to allow preemption */
-static int snd_info_entry_ioctl(struct inode *inode, struct file *file,
-				unsigned int cmd, unsigned long arg)
-{
-	int err;
-	unlock_kernel();
-	err = _snd_info_entry_ioctl(inode, file, cmd, arg);
-	lock_kernel();
-	return err;
-}
-
 static int snd_info_entry_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	struct inode *inode = file->f_dentry->d_inode;
@@ -499,15 +488,15 @@ static int snd_info_entry_mmap(struct fi
 
 static struct file_operations snd_info_entry_operations =
 {
-	.owner =	THIS_MODULE,
-	.llseek =	snd_info_entry_llseek,
-	.read =		snd_info_entry_read,
-	.write =	snd_info_entry_write,
-	.poll =		snd_info_entry_poll,
-	.ioctl =	snd_info_entry_ioctl,
-	.mmap =		snd_info_entry_mmap,
-	.open =		snd_info_entry_open,
-	.release =	snd_info_entry_release,
+	.owner =		THIS_MODULE,
+	.llseek =		snd_info_entry_llseek,
+	.read =			snd_info_entry_read,
+	.write =		snd_info_entry_write,
+	.poll =			snd_info_entry_poll,
+	.unlocked_ioctl =	snd_info_entry_ioctl,
+	.mmap =			snd_info_entry_mmap,
+	.open =			snd_info_entry_open,
+	.release =		snd_info_entry_release,
 };
 
 /**