From: Antonio Ospite <a...@amarulasolutions.com>
Some audio drivers are calling snd_dma_continuous_data(GFP_KERNEL)
which makes "sparse" give a warning:
$ make C=2 M=sound/usb modules
...
sound/usb/6fire/pcm.c:625:25: warning: cast from restricted gfp_t
sound/usb/caiaq/audio.c:845:41: warning: cast from restricted gfp_t
sound/usb/usx2y/usbusx2yaudio.c:997:54: warning: cast from restricted gfp_t
sound/usb/usx2y/usbusx2yaudio.c:1001:54: warning: cast from restricted gfp_t
sound/usb/usx2y/usx2yhwdeppcm.c:774:54: warning: cast from restricted gfp_t
sound/usb/usx2y/usx2yhwdeppcm.c:778:54: warning: cast from restricted gfp_t
Add __force to the cast to silence the warning.
Signed-off-by: Antonio Ospite <a...@amarulasolutions.com>
---
CCing linux-kernel on just this patch of the series as there may be
comments about this practice of forcing casts.
Regards,
Antonio
include/sound/memalloc.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h
index 844af65..cf15b82 100644
--- a/include/sound/memalloc.h
+++ b/include/sound/memalloc.h
@@ -37,7 +37,7 @@ struct snd_dma_device {
#ifndef snd_dma_pci_data
#define snd_dma_pci_data(pci) (&(pci)->dev)
#define snd_dma_isa_data() NULL
-#define snd_dma_continuous_data(x) ((struct device *)(unsigned long)(x))
+#define snd_dma_continuous_data(x) ((struct device *)(__force unsigned
long)(x))
#endif
--
1.7.10.4
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