[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 291b4769bde3..8fa888fc53a0 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 a13bd7bb4c9f..1e606399d74a 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 edba4118271c..d705ec79429b 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 d8f76afd284b..bd106625a783 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 637c555cfdb1..2f7a03103c91 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 2bbeb10ff7c4..24f146b6ebab 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 456be39e8e4a..cfb5f44b2d43 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 9645e9004a48..2da33138fa4b 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;