On 1/4/21 7:44 PM, Randy Dunlap wrote: > 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 Added to arc #for-curr. Thx, -Vineet > --- > 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; >
