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From: Randy Dunlap <>
Cc: Randy Dunlap <>,
	kernel test robot <>,
	Vineet Gupta <>,,
	Dan Williams <>,
	Andrew Morton <>,
	Matthew Wilcox <>, Jan Kara <>,,
Subject: [PATCH v3] arch/arc: add copy_user_page() to <asm/page.h> to fix build error on ARC
Date: Mon,  4 Jan 2021 19:44:53 -0800	[thread overview]
Message-ID: <> (raw)

fs/dax.c uses copy_user_page() but ARC does not provide that interface,
resulting in a build error.

Provide copy_user_page() in <asm/page.h>.

../fs/dax.c: In function 'copy_cow_page_dax':
../fs/dax.c:702:2: error: implicit declaration of function 'copy_user_page'; did you mean 'copy_to_user_page'? [-Werror=implicit-function-declaration]

Reported-by: kernel test robot <>
Signed-off-by: Randy Dunlap <>
Cc: Vineet Gupta <>
Cc: Dan Williams <>
#Acked-by: Vineet Gupta <> # v1
Cc: Andrew Morton <>
Cc: Matthew Wilcox <>
Cc: Jan Kara <>
#Reviewed-by: Ira Weiny <> # v2
v2: rebase, add more Cc:
v3: add copy_user_page() to arch/arc/include/asm/page.h

 arch/arc/include/asm/page.h |    1 +

--- lnx-511-rc1.orig/arch/arc/include/asm/page.h
+++ lnx-511-rc1/arch/arc/include/asm/page.h
@@ -10,6 +10,7 @@
 #ifndef __ASSEMBLY__
 #define clear_page(paddr)		memset((paddr), 0, PAGE_SIZE)
+#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
 #define copy_page(to, from)		memcpy((to), (from), PAGE_SIZE)
 struct vm_area_struct;

             reply	other threads:[~2021-01-05  3:48 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-05  3:44 Randy Dunlap [this message]
2021-01-05  5:07 ` Vineet Gupta

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