[ALSA] sparse address space annotations

ALSA Core,RawMidi Midlevel,ALSA<-OSS emulation,ALSA sequencer
RME32 driver,RME96 driver,EMU10K1/EMU10K2 driver,NM256 driver
Add sparse annotations where we do strange this with __iomem/__user
pointers.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

8 files changed, 33 insertions, 19 deletions

diff --git a/sound/core/memory.c b/sound/core/memory.c
index 291b476..8fa888f 100644
--- a/sound/core/memory.c
+++ b/sound/core/memory.c
@@ -249,7 +249,7 @@ int __exit snd_memory_info_done(void)
 int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count)
 {
 #if defined(__i386__) || defined(CONFIG_SPARC32)
-	return copy_to_user(dst, (const void*)src, count) ? -EFAULT : 0;
+	return copy_to_user(dst, (const void __force*)src, count) ? -EFAULT : 0;
 #else
 	char buf[256];
 	while (count) {
@@ -280,7 +280,7 @@ int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size
 int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count)
 {
 #if defined(__i386__) || defined(CONFIG_SPARC32)
-	return copy_from_user((void*)dst, src, count) ? -EFAULT : 0;
+	return copy_from_user((void __force *)dst, src, count) ? -EFAULT : 0;
 #else
 	char buf[256];
 	while (count) {
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index a13bd7b..1e60639 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -850,7 +850,9 @@ static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __u
 					return xfer > 0 ? xfer : -EAGAIN;
 			}
 		} else {
-			tmp = snd_pcm_oss_write2(substream, (const char *)buf, runtime->oss.period_bytes, 0);
+			tmp = snd_pcm_oss_write2(substream,
+						 (const char __force *)buf,
+						 runtime->oss.period_bytes, 0);
 			if (tmp <= 0)
 				return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 			runtime->oss.bytes += tmp;
@@ -926,7 +928,8 @@ static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *bu
 			xfer += tmp;
 			runtime->oss.buffer_used -= tmp;
 		} else {
-			tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
+			tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
+						runtime->oss.period_bytes, 0);
 			if (tmp <= 0)
 				return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 			runtime->oss.bytes += tmp;
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index edba411..d705ec7 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -984,7 +984,9 @@ static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t coun
 			spin_lock_irq(&runtime->lock);
 		}
 		spin_unlock_irq(&runtime->lock);
-		count1 = snd_rawmidi_kernel_read1(substream, (unsigned char *)buf, count, 0);
+		count1 = snd_rawmidi_kernel_read1(substream,
+						  (unsigned char __force *)buf,
+						  count, 0);
 		if (count1 < 0)
 			return result > 0 ? result : count1;
 		result += count1;
@@ -1213,7 +1215,9 @@ static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, size
 			spin_lock_irq(&runtime->lock);
 		}
 		spin_unlock_irq(&runtime->lock);
-		count1 = snd_rawmidi_kernel_write1(substream, (unsigned char *)buf, count, 0);
+		count1 = snd_rawmidi_kernel_write1(substream,
+						   (unsigned char __force *)buf,
+						   count, 0);
 		if (count1 < 0)
 			return result > 0 ? result : count1;
 		result += count1;
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index d8f76af..bd10662 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -413,7 +413,9 @@ static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count, l
 			}
 			count -= sizeof(snd_seq_event_t);
 			buf += sizeof(snd_seq_event_t);
-			err = snd_seq_expand_var_event(&cell->event, count, (char *)buf, 0, sizeof(snd_seq_event_t));
+			err = snd_seq_expand_var_event(&cell->event, count,
+						       (char __force *)buf, 0,
+						       sizeof(snd_seq_event_t));
 			if (err < 0)
 				break;
 			result += err;
@@ -1009,7 +1011,8 @@ static ssize_t snd_seq_write(struct file *file, const char __user *buf, size_t c
 			}
 			/* set user space pointer */
 			event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR;
-			event.data.ext.ptr = (char*)buf + sizeof(snd_seq_event_t);
+			event.data.ext.ptr = (char __force *)buf
+						+ sizeof(snd_seq_event_t);
 			len += extlen; /* increment data length */
 		} else {
 #ifdef CONFIG_COMPAT
diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c
index 637c555..2f7a031 100644
--- a/sound/pci/emu10k1/emufx.c
+++ b/sound/pci/emu10k1/emufx.c
@@ -470,7 +470,7 @@ static void snd_emu10k1_write_op(emu10k1_fx8010_code_t *icode, unsigned int *ptr
 {
 	u_int32_t *code;
 	snd_assert(*ptr < 512, return);
-	code = (u_int32_t *)icode->code + (*ptr) * 2;
+	code = (u_int32_t __force *)icode->code + (*ptr) * 2;
 	set_bit(*ptr, icode->code_valid);
 	code[0] = ((x & 0x3ff) << 10) | (y & 0x3ff);
 	code[1] = ((op & 0x0f) << 20) | ((r & 0x3ff) << 10) | (a & 0x3ff);
@@ -485,7 +485,7 @@ static void snd_emu10k1_audigy_write_op(emu10k1_fx8010_code_t *icode, unsigned i
 {
 	u_int32_t *code;
 	snd_assert(*ptr < 1024, return);
-	code = (u_int32_t *)icode->code + (*ptr) * 2;
+	code = (u_int32_t __force *)icode->code + (*ptr) * 2;
 	set_bit(*ptr, icode->code_valid);
 	code[0] = ((x & 0x7ff) << 12) | (y & 0x7ff);
 	code[1] = ((op & 0x0f) << 24) | ((r & 0x7ff) << 12) | (a & 0x7ff);
@@ -1042,7 +1042,7 @@ static int __devinit _snd_emu10k1_audigy_init_efx(emu10k1_t *emu)
 		err = -ENOMEM;
 		goto __err;
 	}
-	gpr_map = (u32 *)icode->gpr_map;
+	gpr_map = (u32 __force *)icode->gpr_map;
 
 	icode->tram_data_map = icode->gpr_map + 512;
 	icode->tram_addr_map = icode->tram_data_map + 256;
@@ -1431,7 +1431,7 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
  __err:
 	kfree(controls);
 	if (icode != NULL) {
-		kfree((void *)icode->gpr_map);
+		kfree((void __force *)icode->gpr_map);
 		kfree(icode);
 	}
 	return err;
@@ -1511,7 +1511,7 @@ static int __devinit _snd_emu10k1_init_efx(emu10k1_t *emu)
 		err = -ENOMEM;
 		goto __err;
 	}
-	gpr_map = (u32 *)icode->gpr_map;
+	gpr_map = (u32 __force *)icode->gpr_map;
 
 	icode->tram_data_map = icode->gpr_map + 256;
 	icode->tram_addr_map = icode->tram_data_map + 160;
@@ -2032,7 +2032,7 @@ static int __devinit _snd_emu10k1_init_efx(emu10k1_t *emu)
 	kfree(ipcm);
 	kfree(controls);
 	if (icode != NULL) {
-		kfree((void *)icode->gpr_map);
+		kfree((void __force *)icode->gpr_map);
 		kfree(icode);
 	}
 	return err;
diff --git a/sound/pci/nm256/nm256.c b/sound/pci/nm256/nm256.c
index 2bbeb10..24f146b 100644
--- a/sound/pci/nm256/nm256.c
+++ b/sound/pci/nm256/nm256.c
@@ -840,7 +840,7 @@ static void snd_nm256_setup_stream(nm256_t *chip, nm256_stream_t *s,
 	runtime->hw = *hw_ptr;
 	runtime->hw.buffer_bytes_max = s->bufsize;
 	runtime->hw.period_bytes_max = s->bufsize / 2;
-	runtime->dma_area = (void*) s->bufptr;
+	runtime->dma_area = (void __force *) s->bufptr;
 	runtime->dma_addr = s->bufptr_addr;
 	runtime->dma_bytes = s->bufsize;
 	runtime->private_data = s;
diff --git a/sound/pci/rme32.c b/sound/pci/rme32.c
index 456be39..cfb5f44 100644
--- a/sound/pci/rme32.c
+++ b/sound/pci/rme32.c
@@ -692,7 +692,8 @@ snd_rme32_playback_hw_params(snd_pcm_substream_t * substream,
 		if (err < 0)
 			return err;
 	} else {
-		runtime->dma_area = (void *)(rme32->iobase + RME32_IO_DATA_BUFFER);
+		runtime->dma_area = (void __force *)(rme32->iobase +
+						     RME32_IO_DATA_BUFFER);
 		runtime->dma_addr = rme32->port + RME32_IO_DATA_BUFFER;
 		runtime->dma_bytes = RME32_BUFFER_SIZE;
 	}
@@ -746,7 +747,8 @@ snd_rme32_capture_hw_params(snd_pcm_substream_t * substream,
 		if (err < 0)
 			return err;
 	} else {
-		runtime->dma_area = (void *)rme32->iobase + RME32_IO_DATA_BUFFER;
+		runtime->dma_area = (void __force *)rme32->iobase +
+					RME32_IO_DATA_BUFFER;
 		runtime->dma_addr = rme32->port + RME32_IO_DATA_BUFFER;
 		runtime->dma_bytes = RME32_BUFFER_SIZE;
 	}
diff --git a/sound/pci/rme96.c b/sound/pci/rme96.c
index 9645e90..2da3313 100644
--- a/sound/pci/rme96.c
+++ b/sound/pci/rme96.c
@@ -985,7 +985,8 @@ snd_rme96_playback_hw_params(snd_pcm_substream_t *substream,
 	snd_pcm_runtime_t *runtime = substream->runtime;
 	int err, rate, dummy;
 
-	runtime->dma_area = (void *)(rme96->iobase + RME96_IO_PLAY_BUFFER);
+	runtime->dma_area = (void __force *)(rme96->iobase +
+					     RME96_IO_PLAY_BUFFER);
 	runtime->dma_addr = rme96->port + RME96_IO_PLAY_BUFFER;
 	runtime->dma_bytes = RME96_BUFFER_SIZE;
 
@@ -1037,7 +1038,8 @@ snd_rme96_capture_hw_params(snd_pcm_substream_t *substream,
 	snd_pcm_runtime_t *runtime = substream->runtime;
 	int err, isadat, rate;
 	
-	runtime->dma_area = (void *)(rme96->iobase + RME96_IO_REC_BUFFER);
+	runtime->dma_area = (void __force *)(rme96->iobase +
+					     RME96_IO_REC_BUFFER);
 	runtime->dma_addr = rme96->port + RME96_IO_REC_BUFFER;
 	runtime->dma_bytes = RME96_BUFFER_SIZE;