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 <lkp@xxxxxxxxx> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx> Cc: linux-snps-arc@xxxxxxxxxxxxxxxxxxx Cc: Dan Williams <dan.j.williams@xxxxxxxxx> #Acked-by: Vineet Gupta <vgupta@xxxxxxxxxxxx> # v1 Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> Cc: Jan Kara <jack@xxxxxxx> Cc: linux-fsdevel@xxxxxxxxxxxxxxx Cc: linux-nvdimm@xxxxxxxxxxxx #Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx> # 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;
