[ALSA] Fix compilation on 32bit arch

ALSA<-OSS emulation
Fix the division with int64 for 32bit architectures.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 10 insertions, 1 deletions

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 131522ea4b93..468fca8894d9 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -129,7 +129,16 @@ static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames)
         long bytes = frames_to_bytes(runtime, frames);
         if (buffer_size == runtime->oss.buffer_bytes)
                 return bytes;
-        return (long)(((int64_t)runtime->oss.buffer_bytes * (int64_t)bytes) / (int64_t)buffer_size);
+#if BITS_PER_LONG >= 64
+        return runtime->oss.buffer_bytes * bytes / buffer_size;
+#else
+        {
+                u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
+                u32 rem;
+                div64_32(&bsize, buffer_size, &rem);
+                return (long)bsize;
+        }
+#endif
 }
 
 static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes)