ALSA: core: sparse cleanups

Change the core code where sparse complains.  In most cases, this means
just adding annotations to confirm that we indeed want to do the dirty
things we're doing.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 9 insertions, 8 deletions

diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 99a485f1364..f2436d33fbf 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -1052,7 +1052,7 @@ static ssize_t snd_seq_write(struct file *file, const char __user *buf,
                 } else {
 #ifdef CONFIG_COMPAT
                         if (client->convert32 && snd_seq_ev_is_varusr(&event)) {
-                                void *ptr = compat_ptr(event.data.raw32.d[1]);
+                                void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]);
                                 event.data.ext.ptr = ptr;
                         }
 #endif
@@ -2407,7 +2407,7 @@ int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg)
         if (client == NULL)
                 return -ENXIO;
         fs = snd_enter_user();
-        result = snd_seq_do_ioctl(client, cmd, (void __user *)arg);
+        result = snd_seq_do_ioctl(client, cmd, (void __force __user *)arg);
         snd_leave_user(fs);
         return result;
 }
@@ -2497,9 +2497,6 @@ static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer,
 }
 
 
-void snd_seq_info_pool(struct snd_info_buffer *buffer,
-                       struct snd_seq_pool *pool, char *space);
-
 /* exported to seq_info.c */
 void snd_seq_info_clients_read(struct snd_info_entry *entry, 
                                struct snd_info_buffer *buffer)
diff --git a/sound/core/seq/seq_memory.c b/sound/core/seq/seq_memory.c
index 7fb55436287..7f50c143767 100644
--- a/sound/core/seq/seq_memory.c
+++ b/sound/core/seq/seq_memory.c
@@ -86,7 +86,7 @@ int snd_seq_dump_var_event(const struct snd_seq_event *event,
 
         if (event->data.ext.len & SNDRV_SEQ_EXT_USRPTR) {
                 char buf[32];
-                char __user *curptr = (char __user *)event->data.ext.ptr;
+                char __user *curptr = (char __force __user *)event->data.ext.ptr;
                 while (len > 0) {
                         int size = sizeof(buf);
                         if (len < size)
@@ -157,7 +157,7 @@ int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char
         if (event->data.ext.len & SNDRV_SEQ_EXT_USRPTR) {
                 if (! in_kernel)
                         return -EINVAL;
-                if (copy_from_user(buf, (void __user *)event->data.ext.ptr, len))
+                if (copy_from_user(buf, (void __force __user *)event->data.ext.ptr, len))
                         return -EFAULT;
                 return newlen;
         }
@@ -343,7 +343,7 @@ int snd_seq_event_dup(struct snd_seq_pool *pool, struct snd_seq_event *event,
                                 tmp->event = src->event;
                                 src = src->next;
                         } else if (is_usrptr) {
-                                if (copy_from_user(&tmp->event, (char __user *)buf, size)) {
+                                if (copy_from_user(&tmp->event, (char __force __user *)buf, size)) {
                                         err = -EFAULT;
                                         goto __error;
                                 }
diff --git a/sound/core/seq/seq_memory.h b/sound/core/seq/seq_memory.h
index 63e91431a29..4a2ec779b8a 100644
--- a/sound/core/seq/seq_memory.h
+++ b/sound/core/seq/seq_memory.h
@@ -24,6 +24,8 @@
 #include <sound/seq_kernel.h>
 #include <linux/poll.h>
 
+struct snd_info_buffer;
+
 /* container for sequencer event (internal use) */
 struct snd_seq_event_cell {
         struct snd_seq_event event;
@@ -99,5 +101,7 @@ void snd_sequencer_memory_done(void);
 /* polling */
 int snd_seq_pool_poll_wait(struct snd_seq_pool *pool, struct file *file, poll_table *wait);
 
+void snd_seq_info_pool(struct snd_info_buffer *buffer,
+                       struct snd_seq_pool *pool, char *space);
 
 #endif