@@ -157,7 +157,6 @@ size_t u_audio_playback(struct gaudio *card, void *buf, size_t count)
struct gaudio_snd_dev *snd = &card->playback;
struct snd_pcm_substream *substream = snd->substream;
struct snd_pcm_runtime *runtime = substream->runtime;
- mm_segment_t old_fs;
ssize_t result;
snd_pcm_sframes_t frames;
@@ -174,15 +173,12 @@ size_t u_audio_playback(struct gaudio *card, void *buf, size_t count)
}
frames = bytes_to_frames(runtime, count);
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- result = snd_pcm_lib_write(snd->substream, (void __user *)buf, frames);
+ result = snd_pcm_lib_write(snd->substream, (void __user *)buf, frames,
+ true);
if (result != frames) {
ERROR(card, "Playback error: %d\n", (int)result);
- set_fs(old_fs);
goto try_again;
}
- set_fs(old_fs);
return 0;
}
@@ -1085,13 +1085,16 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
const void __user *buf,
- snd_pcm_uframes_t frames);
+ snd_pcm_uframes_t frames, bool in_kernel);
snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
- void __user *buf, snd_pcm_uframes_t frames);
+ void __user *buf, snd_pcm_uframes_t frames,
+ bool in_kernel);
snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
- void __user **bufs, snd_pcm_uframes_t frames);
+ void __user **bufs, snd_pcm_uframes_t frames,
+ bool in_kernel);
snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
- void __user **bufs, snd_pcm_uframes_t frames);
+ void __user **bufs, snd_pcm_uframes_t frames,
+ bool in_kernel);
extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
@@ -67,18 +67,6 @@ static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
-static inline mm_segment_t snd_enter_user(void)
-{
- mm_segment_t fs = get_fs();
- set_fs(get_ds());
- return fs;
-}
-
-static inline void snd_leave_user(mm_segment_t fs)
-{
- set_fs(fs);
-}
-
/*
* helper functions to process hw_params
*/
@@ -1191,14 +1179,8 @@ snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const
if (ret < 0)
break;
}
- if (in_kernel) {
- mm_segment_t fs;
- fs = snd_enter_user();
- ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
- snd_leave_user(fs);
- } else {
- ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
- }
+ ret = snd_pcm_lib_write(substream, (void __force __user *)ptr,
+ frames, in_kernel);
if (ret != -EPIPE && ret != -ESTRPIPE)
break;
/* test, if we can't store new data, because the stream */
@@ -1234,14 +1216,8 @@ snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *p
ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
if (ret < 0)
break;
- if (in_kernel) {
- mm_segment_t fs;
- fs = snd_enter_user();
- ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
- snd_leave_user(fs);
- } else {
- ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
- }
+ ret = snd_pcm_lib_read(substream, (void __force __user *)ptr,
+ frames, in_kernel);
if (ret == -EPIPE) {
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
@@ -1273,14 +1249,8 @@ snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void
if (ret < 0)
break;
}
- if (in_kernel) {
- mm_segment_t fs;
- fs = snd_enter_user();
- ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
- snd_leave_user(fs);
- } else {
- ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
- }
+ ret = snd_pcm_lib_writev(substream, (void __user **)bufs,
+ frames, in_kernel);
if (ret != -EPIPE && ret != -ESTRPIPE)
break;
@@ -1313,14 +1283,8 @@ snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void *
if (ret < 0)
break;
}
- if (in_kernel) {
- mm_segment_t fs;
- fs = snd_enter_user();
- ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
- snd_leave_user(fs);
- } else {
- ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
- }
+ ret = snd_pcm_lib_readv(substream, (void __user **)bufs,
+ frames, in_kernel);
if (ret != -EPIPE && ret != -ESTRPIPE)
break;
}
@@ -1653,7 +1617,6 @@ static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
size = (runtime->frame_bits * size) / 8;
while (size > 0) {
- mm_segment_t fs;
size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
size -= size1;
size1 *= 8;
@@ -1662,14 +1625,15 @@ static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
runtime->oss.buffer,
size1);
size1 /= runtime->channels; /* frames */
- fs = snd_enter_user();
- snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
- snd_leave_user(fs);
+ snd_pcm_lib_write(substream,
+ (void __force __user *)runtime->oss.buffer,
+ size1, true);
}
} else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
void __user *buffers[runtime->channels];
memset(buffers, 0, runtime->channels * sizeof(void *));
- snd_pcm_lib_writev(substream, buffers, size);
+ snd_pcm_lib_writev(substream, buffers, size,
+ false);
}
}
mutex_unlock(&runtime->oss.params_lock);
@@ -384,9 +384,11 @@ static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
return -EFAULT;
if (dir == SNDRV_PCM_STREAM_PLAYBACK)
- err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
+ err = snd_pcm_lib_write(substream, compat_ptr(buf), frames,
+ false);
else
- err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
+ err = snd_pcm_lib_read(substream, compat_ptr(buf), frames,
+ false);
if (err < 0)
return err;
/* copy the result */
@@ -442,9 +444,9 @@ static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
bufptr++;
}
if (dir == SNDRV_PCM_STREAM_PLAYBACK)
- err = snd_pcm_lib_writev(substream, bufs, frames);
+ err = snd_pcm_lib_writev(substream, bufs, frames, false);
else
- err = snd_pcm_lib_readv(substream, bufs, frames);
+ err = snd_pcm_lib_readv(substream, bufs, frames, false);
if (err >= 0) {
if (put_user(err, &data32->result))
err = -EFAULT;
@@ -1990,19 +1990,26 @@ static int wait_for_avail(struct snd_pcm_substream *substream,
static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream,
unsigned int hwoff,
unsigned long data, unsigned int off,
- snd_pcm_uframes_t frames)
+ snd_pcm_uframes_t frames,
+ bool in_kernel)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
char __user *buf = (char __user *) data + frames_to_bytes(runtime, off);
if (substream->ops->copy_silence) {
err = substream->ops->copy_silence(substream, -1, hwoff, buf,
- frames, false);
+ frames, in_kernel);
if (err < 0)
return err;
} else {
- char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
- if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames)))
+ char *hwbuf = runtime->dma_area +
+ frames_to_bytes(runtime, hwoff);
+
+ if (in_kernel)
+ memcpy(hwbuf, (void *)buf,
+ frames_to_bytes(runtime, frames));
+ else if (copy_from_user(hwbuf, buf,
+ frames_to_bytes(runtime, frames)))
return -EFAULT;
}
return 0;
@@ -2010,13 +2017,14 @@ static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream,
typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff,
unsigned long data, unsigned int off,
- snd_pcm_uframes_t size);
+ snd_pcm_uframes_t size, bool in_kernel);
static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
unsigned long data,
snd_pcm_uframes_t size,
int nonblock,
- transfer_f transfer)
+ transfer_f transfer,
+ bool in_kernel)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t xfer = 0;
@@ -2074,7 +2082,8 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream,
appl_ptr = runtime->control->appl_ptr;
appl_ofs = appl_ptr % runtime->buffer_size;
snd_pcm_stream_unlock_irq(substream);
- err = transfer(substream, appl_ofs, data, offset, frames);
+ err = transfer(substream, appl_ofs, data, offset, frames,
+ in_kernel);
snd_pcm_stream_lock_irq(substream);
if (err < 0)
goto _end_unlock;
@@ -2128,7 +2137,9 @@ static int pcm_sanity_check(struct snd_pcm_substream *substream)
return 0;
}
-snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size)
+snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
+ const void __user *buf,
+ snd_pcm_uframes_t size, bool in_kernel)
{
struct snd_pcm_runtime *runtime;
int nonblock;
@@ -2144,15 +2155,15 @@ snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const v
runtime->channels > 1)
return -EINVAL;
return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock,
- snd_pcm_lib_write_transfer);
+ snd_pcm_lib_write_transfer, in_kernel);
}
-
EXPORT_SYMBOL(snd_pcm_lib_write);
static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
unsigned int hwoff,
unsigned long data, unsigned int off,
- snd_pcm_uframes_t frames)
+ snd_pcm_uframes_t frames,
+ bool in_kernel)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
@@ -2168,7 +2179,8 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
else
buf = *bufs + samples_to_bytes(runtime, off);
err = substream->ops->copy_silence(substream, c, hwoff,
- buf, frames, false);
+ buf, frames,
+ in_kernel);
if (err < 0)
return err;
}
@@ -2176,12 +2188,21 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
/* default transfer behaviour */
size_t dma_csize = runtime->dma_bytes / channels;
for (c = 0; c < channels; ++c, ++bufs) {
- char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
- if (*bufs == NULL) {
- snd_pcm_format_set_silence(runtime->format, hwbuf, frames);
+ char *hwbuf = runtime->dma_area + (c * dma_csize) +
+ samples_to_bytes(runtime, hwoff);
+
+ if (!*bufs) {
+ snd_pcm_format_set_silence(runtime->format,
+ hwbuf, frames);
} else {
- char __user *buf = *bufs + samples_to_bytes(runtime, off);
- if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames)))
+ char __user *buf = *bufs +
+ samples_to_bytes(runtime, off);
+
+ if (in_kernel)
+ memcpy(hwbuf, (void *)buf,
+ samples_to_bytes(runtime, frames));
+ else if (copy_from_user(hwbuf, buf,
+ samples_to_bytes(runtime, frames)))
return -EFAULT;
}
}
@@ -2191,7 +2212,8 @@ static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
void __user **bufs,
- snd_pcm_uframes_t frames)
+ snd_pcm_uframes_t frames,
+ bool in_kernel)
{
struct snd_pcm_runtime *runtime;
int nonblock;
@@ -2206,27 +2228,34 @@ snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
return -EINVAL;
return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames,
- nonblock, snd_pcm_lib_writev_transfer);
+ nonblock, snd_pcm_lib_writev_transfer,
+ in_kernel);
}
-
EXPORT_SYMBOL(snd_pcm_lib_writev);
static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream,
unsigned int hwoff,
unsigned long data, unsigned int off,
- snd_pcm_uframes_t frames)
+ snd_pcm_uframes_t frames,
+ bool in_kernel)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
char __user *buf = (char __user *) data + frames_to_bytes(runtime, off);
if (substream->ops->copy_silence) {
err = substream->ops->copy_silence(substream, -1, hwoff, buf,
- frames, false);
+ frames, in_kernel);
if (err < 0)
return err;
} else {
- char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff);
- if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames)))
+ char *hwbuf = runtime->dma_area +
+ frames_to_bytes(runtime, hwoff);
+
+ if (in_kernel)
+ memcpy((void *)buf, hwbuf,
+ frames_to_bytes(runtime, frames));
+ else if (copy_to_user(buf, hwbuf,
+ frames_to_bytes(runtime, frames)))
return -EFAULT;
}
return 0;
@@ -2236,7 +2265,8 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
unsigned long data,
snd_pcm_uframes_t size,
int nonblock,
- transfer_f transfer)
+ transfer_f transfer,
+ bool in_kernel)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t xfer = 0;
@@ -2308,7 +2338,8 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
appl_ptr = runtime->control->appl_ptr;
appl_ofs = appl_ptr % runtime->buffer_size;
snd_pcm_stream_unlock_irq(substream);
- err = transfer(substream, appl_ofs, data, offset, frames);
+ err = transfer(substream, appl_ofs, data, offset, frames,
+ in_kernel);
snd_pcm_stream_lock_irq(substream);
if (err < 0)
goto _end_unlock;
@@ -2342,7 +2373,9 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream,
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
}
-snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size)
+snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
+ void __user *buf, snd_pcm_uframes_t size,
+ bool in_kernel)
{
struct snd_pcm_runtime *runtime;
int nonblock;
@@ -2355,7 +2388,8 @@ snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __u
nonblock = !!(substream->f_flags & O_NONBLOCK);
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED)
return -EINVAL;
- return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer);
+ return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock,
+ snd_pcm_lib_read_transfer, in_kernel);
}
EXPORT_SYMBOL(snd_pcm_lib_read);
@@ -2363,7 +2397,8 @@ EXPORT_SYMBOL(snd_pcm_lib_read);
static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream,
unsigned int hwoff,
unsigned long data, unsigned int off,
- snd_pcm_uframes_t frames)
+ snd_pcm_uframes_t frames,
+ bool in_kernel)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
@@ -2379,19 +2414,25 @@ static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream,
continue;
buf = *bufs + samples_to_bytes(runtime, off);
err = substream->ops->copy_silence(substream, c, hwoff,
- buf, frames, false);
+ buf, frames,
+ in_kernel);
if (err < 0)
return err;
}
} else {
snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels;
for (c = 0; c < channels; ++c, ++bufs) {
- if (*bufs == NULL)
+ if (!*bufs)
continue;
- hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff);
+ hwbuf = runtime->dma_area + (c * dma_csize) +
+ samples_to_bytes(runtime, hwoff);
buf = *bufs + samples_to_bytes(runtime, off);
- if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames)))
+ if (in_kernel)
+ memcpy((void *)buf, hwbuf,
+ samples_to_bytes(runtime, frames));
+ else if (copy_to_user(buf, hwbuf,
+ samples_to_bytes(runtime, frames)))
return -EFAULT;
}
}
@@ -2400,7 +2441,7 @@ static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream,
snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
void __user **bufs,
- snd_pcm_uframes_t frames)
+ snd_pcm_uframes_t frames, bool in_kernel)
{
struct snd_pcm_runtime *runtime;
int nonblock;
@@ -2416,9 +2457,10 @@ snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
nonblock = !!(substream->f_flags & O_NONBLOCK);
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
return -EINVAL;
- return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer);
+ return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames,
+ nonblock, snd_pcm_lib_readv_transfer,
+ in_kernel);
}
-
EXPORT_SYMBOL(snd_pcm_lib_readv);
/*
@@ -2839,7 +2839,8 @@ static int snd_pcm_playback_ioctl1(struct file *file,
return -EFAULT;
if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
return -EFAULT;
- result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
+ result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames,
+ false);
__put_user(result, &_xferi->result);
return result < 0 ? result : 0;
}
@@ -2863,7 +2864,8 @@ static int snd_pcm_playback_ioctl1(struct file *file,
sizeof(void *) * runtime->channels);
if (IS_ERR(bufs))
return PTR_ERR(bufs);
- result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
+ result = snd_pcm_lib_writev(substream, bufs, xfern.frames,
+ false);
kfree(bufs);
__put_user(result, &_xfern->result);
return result < 0 ? result : 0;
@@ -2919,7 +2921,8 @@ static int snd_pcm_capture_ioctl1(struct file *file,
return -EFAULT;
if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
return -EFAULT;
- result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
+ result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames,
+ false);
__put_user(result, &_xferi->result);
return result < 0 ? result : 0;
}
@@ -2943,7 +2946,8 @@ static int snd_pcm_capture_ioctl1(struct file *file,
sizeof(void *) * runtime->channels);
if (IS_ERR(bufs))
return PTR_ERR(bufs);
- result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
+ result = snd_pcm_lib_readv(substream, bufs, xfern.frames,
+ false);
kfree(bufs);
__put_user(result, &_xfern->result);
return result < 0 ? result : 0;
@@ -3075,7 +3079,7 @@ static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
if (!frame_aligned(runtime, count))
return -EINVAL;
count = bytes_to_frames(runtime, count);
- result = snd_pcm_lib_read(substream, buf, count);
+ result = snd_pcm_lib_read(substream, buf, count, false);
if (result > 0)
result = frames_to_bytes(runtime, result);
return result;
@@ -3099,7 +3103,7 @@ static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
if (!frame_aligned(runtime, count))
return -EINVAL;
count = bytes_to_frames(runtime, count);
- result = snd_pcm_lib_write(substream, buf, count);
+ result = snd_pcm_lib_write(substream, buf, count, false);
if (result > 0)
result = frames_to_bytes(runtime, result);
return result;
@@ -3134,7 +3138,7 @@ static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
return -ENOMEM;
for (i = 0; i < to->nr_segs; ++i)
bufs[i] = to->iov[i].iov_base;
- result = snd_pcm_lib_readv(substream, bufs, frames);
+ result = snd_pcm_lib_readv(substream, bufs, frames, false);
if (result > 0)
result = frames_to_bytes(runtime, result);
kfree(bufs);
@@ -3169,7 +3173,7 @@ static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
return -ENOMEM;
for (i = 0; i < from->nr_segs; ++i)
bufs[i] = from->iov[i].iov_base;
- result = snd_pcm_lib_writev(substream, bufs, frames);
+ result = snd_pcm_lib_writev(substream, bufs, frames, false);
if (result > 0)
result = frames_to_bytes(runtime, result);
kfree(bufs);
Along with the conversion to copy_silence PCM ops, the direct call of the callback from/to the kernel-space buffer is supported without set_fs() hack in all places. Now let's kill the last-standing set_fs() usage in the OSS layer and USB gadget driver. This patch adds the in_kernel argument to each read/write PCM helper function, and the flag is passed through to the copy_silence ops. Signed-off-by: Takashi Iwai <tiwai@suse.de> --- drivers/usb/gadget/function/u_uac1.c | 8 +-- include/sound/pcm.h | 11 ++-- sound/core/oss/pcm_oss.c | 62 ++++--------------- sound/core/pcm_compat.c | 10 +-- sound/core/pcm_lib.c | 114 ++++++++++++++++++++++++----------- sound/core/pcm_native.c | 20 +++--- 6 files changed, 118 insertions(+), 107 deletions(-)