[PATCH] ALSA: core: Fix build error due to missing PAGE_SIZE

[Takashi Iwai]

The recent refactoring of memalloc stuff removed the inclusion of
asm/page.h for simplicity, but it turned out this caused a compile
error due the lack of PAGE_SIZE definition on some architectures.
Do a partial revert for recovering from that.

Fixes: 37af81c5998f ("ALSA: core: Abstract memory alloc helpers")
Reported-by: kernel test robot <lkp at intel.com>
Link: https://lore.kernel.org/r/202106101858.PfXMMuAa-lkp@intel.com
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 include/sound/memalloc.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h
index 1918c60f1f35..44d87775b352 100644
--- a/include/sound/memalloc.h
+++ b/include/sound/memalloc.h
@@ -9,8 +9,9 @@
 #ifndef __SOUND_MEMALLOC_H
 #define __SOUND_MEMALLOC_H
 
+#include <asm/page.h>
+
 struct device;
-struct page;
 struct vm_area_struct;
 
 /*
-- 
2.26.2