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authorArnd Bergmann <arnd@arndb.de>2010-09-14 21:53:41 +0200
committerTakashi Iwai <tiwai@suse.de>2010-09-14 23:14:50 +0200
commit645ef9ef1fc0ff70456495b1e21d3420b7b08541 (patch)
treef5e5df85076f397690437f09cb56688b06a03dbf /sound/oss/soundcard.c
parent7b6c3a34e93aafc5dd9adc7dee87c7fa61d8bdbb (diff)
sound: autoconvert trivial BKL users to private mutex
The usage of the BKL in the OSS sound drivers is trivial, and each of them only locks against itself, so it can be turned into per-driver mutexes. This is the script that was used for the conversion: file=$1 name=$2 if grep -q lock_kernel ${file} ; then if grep -q 'include.*linux.mutex.h' ${file} ; then sed -i '/include.*<linux\/smp_lock.h>/d' ${file} else sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file} fi sed -i ${file} \ -e "/^#include.*linux.mutex.h/,$ { 1,/^\(static\|int\|long\)/ { /^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex); } }" \ -e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \ -e '/[ ]*cycle_kernel_lock();/d' else sed -i -e '/include.*\<smp_lock.h\>/d' ${file} \ -e '/cycle_kernel_lock()/d' fi Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/oss/soundcard.c')
-rw-r--r--sound/oss/soundcard.c41
1 files changed, 21 insertions, 20 deletions
diff --git a/sound/oss/soundcard.c b/sound/oss/soundcard.c
index 92aa762ffb7e..938ed94f904f 100644
--- a/sound/oss/soundcard.c
+++ b/sound/oss/soundcard.c
@@ -40,7 +40,7 @@
#include <linux/major.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/device.h>
@@ -56,6 +56,7 @@
* Table for permanently allocated memory (used when unloading the module)
*/
void * sound_mem_blocks[MAX_MEM_BLOCKS];
+static DEFINE_MUTEX(soundcard_mutex);
int sound_nblocks = 0;
/* Persistent DMA buffers */
@@ -151,7 +152,7 @@ static ssize_t sound_read(struct file *file, char __user *buf, size_t count, lof
* big one anyway, we might as well bandage here..
*/
- lock_kernel();
+ mutex_lock(&soundcard_mutex);
DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
switch (dev & 0x0f) {
@@ -169,7 +170,7 @@ static ssize_t sound_read(struct file *file, char __user *buf, size_t count, lof
case SND_DEV_MIDIN:
ret = MIDIbuf_read(dev, file, buf, count);
}
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return ret;
}
@@ -178,7 +179,7 @@ static ssize_t sound_write(struct file *file, const char __user *buf, size_t cou
int dev = iminor(file->f_path.dentry->d_inode);
int ret = -EINVAL;
- lock_kernel();
+ mutex_lock(&soundcard_mutex);
DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
switch (dev & 0x0f) {
case SND_DEV_SEQ:
@@ -196,7 +197,7 @@ static ssize_t sound_write(struct file *file, const char __user *buf, size_t cou
ret = MIDIbuf_write(dev, file, buf, count);
break;
}
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return ret;
}
@@ -210,7 +211,7 @@ static int sound_open(struct inode *inode, struct file *file)
printk(KERN_ERR "Invalid minor device %d\n", dev);
return -ENXIO;
}
- lock_kernel();
+ mutex_lock(&soundcard_mutex);
switch (dev & 0x0f) {
case SND_DEV_CTL:
dev >>= 4;
@@ -247,7 +248,7 @@ static int sound_open(struct inode *inode, struct file *file)
retval = -ENXIO;
}
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return 0;
}
@@ -255,7 +256,7 @@ static int sound_release(struct inode *inode, struct file *file)
{
int dev = iminor(inode);
- lock_kernel();
+ mutex_lock(&soundcard_mutex);
DEB(printk("sound_release(dev=%d)\n", dev));
switch (dev & 0x0f) {
case SND_DEV_CTL:
@@ -280,7 +281,7 @@ static int sound_release(struct inode *inode, struct file *file)
default:
printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
}
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return 0;
}
@@ -354,7 +355,7 @@ static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
if (cmd == OSS_GETVERSION)
return __put_user(SOUND_VERSION, (int __user *)p);
- lock_kernel();
+ mutex_lock(&soundcard_mutex);
if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 && /* Mixer ioctl */
(dev & 0x0f) != SND_DEV_CTL) {
dtype = dev & 0x0f;
@@ -369,7 +370,7 @@ static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
ret = sound_mixer_ioctl(dev >> 4, cmd, p);
break;
}
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return ret;
}
@@ -399,7 +400,7 @@ static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
break;
}
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return ret;
}
@@ -439,35 +440,35 @@ static int sound_mmap(struct file *file, struct vm_area_struct *vma)
printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
return -EINVAL;
}
- lock_kernel();
+ mutex_lock(&soundcard_mutex);
if (vma->vm_flags & VM_WRITE) /* Map write and read/write to the output buf */
dmap = audio_devs[dev]->dmap_out;
else if (vma->vm_flags & VM_READ)
dmap = audio_devs[dev]->dmap_in;
else {
printk(KERN_ERR "Sound: Undefined mmap() access\n");
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return -EINVAL;
}
if (dmap == NULL) {
printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return -EIO;
}
if (dmap->raw_buf == NULL) {
printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return -EIO;
}
if (dmap->mapping_flags) {
printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return -EIO;
}
if (vma->vm_pgoff != 0) {
printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return -EINVAL;
}
size = vma->vm_end - vma->vm_start;
@@ -478,7 +479,7 @@ static int sound_mmap(struct file *file, struct vm_area_struct *vma)
if (remap_pfn_range(vma, vma->vm_start,
virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return -EAGAIN;
}
@@ -490,7 +491,7 @@ static int sound_mmap(struct file *file, struct vm_area_struct *vma)
memset(dmap->raw_buf,
dmap->neutral_byte,
dmap->bytes_in_use);
- unlock_kernel();
+ mutex_unlock(&soundcard_mutex);
return 0;
}