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Date: Thu, 31 Dec 2020 20:29:14 -0800 From: Randy Dunlap <rdunlap@...radead.org> To: linux-kernel@...r.kernel.org Cc: Randy Dunlap <rdunlap@...radead.org>, kernel test robot <lkp@...el.com>, Vineet Gupta <vgupta@...opsys.com>, linux-snps-arc@...ts.infradead.org, Dan Williams <dan.j.williams@...el.com>, Vineet Gupta <vgupts@...opsys.com>, Andrew Morton <akpm@...ux-foundation.org>, Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.cz>, linux-fsdevel@...r.kernel.org, linux-nvdimm@...ts.01.org Subject: [PATCH v2] fs/dax: include <asm/page.h> to fix build error on ARC 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> (beside copy_page()) and add <asm/page.h> to fs/dax.c to fix the build error. ../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] Fixes: cccbce671582 ("filesystem-dax: convert to dax_direct_access()") Reported-by: kernel test robot <lkp@...el.com> Signed-off-by: Randy Dunlap <rdunlap@...radead.org> Cc: Vineet Gupta <vgupta@...opsys.com> Cc: linux-snps-arc@...ts.infradead.org Cc: Dan Williams <dan.j.williams@...el.com> Acked-by: Vineet Gupta <vgupts@...opsys.com> Cc: Andrew Morton <akpm@...ux-foundation.org> Cc: Matthew Wilcox <willy@...radead.org> Cc: Jan Kara <jack@...e.cz> Cc: linux-fsdevel@...r.kernel.org Cc: linux-nvdimm@...ts.01.org --- v2: rebase, add more Cc: arch/arc/include/asm/page.h | 1 + fs/dax.c | 1 + 2 files changed, 2 insertions(+) --- lnx-511-rc1.orig/fs/dax.c +++ lnx-511-rc1/fs/dax.c @@ -25,6 +25,7 @@ #include <linux/sizes.h> #include <linux/mmu_notifier.h> #include <linux/iomap.h> +#include <asm/page.h> #include <asm/pgalloc.h> #define CREATE_TRACE_POINTS --- 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;
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