[AUTOSEL,4.14,06/67] ALSA: pcm: Add __force to cast in snd_pcm_lib_read/write()
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Message ID 20180907003716.57737-6-alexander.levin@microsoft.com
State New, archived
Headers show
Series
  • [AUTOSEL,4.14,01/67] usb: dwc3: change stream event enable bit back to 13
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Commit Message

Sasha Levin Sept. 7, 2018, 12:37 a.m. UTC
From: Takashi Iwai <tiwai@suse.de>

[ Upstream commit 95a48b7d4459948b6bacf809809cf01a7dc06d1d ]

The snd_pcm_lib_read() and snd_pcm_lib_write() inline functions have
the explicit cast from a user pointer to a kernel pointer, but they
lacks of __force prefix.

This fixes sparse warnings like:
  ./include/sound/pcm.h:1093:47: warning: cast removes address space of expression

Fixes: 68541213720d ("ALSA: pcm: Direct in-kernel read/write support")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 include/sound/pcm.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch
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diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 24febf9e177c..5087200599f1 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -1081,14 +1081,14 @@  static inline snd_pcm_sframes_t
 snd_pcm_lib_write(struct snd_pcm_substream *substream,
 		  const void __user *buf, snd_pcm_uframes_t frames)
 {
-	return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, false);
+	return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false);
 }
 
 static inline snd_pcm_sframes_t
 snd_pcm_lib_read(struct snd_pcm_substream *substream,
 		 void __user *buf, snd_pcm_uframes_t frames)
 {
-	return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, false);
+	return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false);
 }
 
 static inline snd_pcm_sframes_t