* [PATCH v3] arch/arc: add copy_user_page() to <asm/page.h> to fix build error on ARC
@ 2021-01-05 3:44 Randy Dunlap
2021-01-05 5:07 ` Vineet Gupta
0 siblings, 1 reply; 2+ messages in thread
From: Randy Dunlap @ 2021-01-05 3:44 UTC (permalink / raw)
To: linux-kernel
Cc: Randy Dunlap, kernel test robot, Vineet Gupta, linux-snps-arc,
Andrew Morton, Matthew Wilcox, Jan Kara, linux-fsdevel,
linux-nvdimm
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@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: Dan Williams <dan.j.williams@intel.com>
#Acked-by: Vineet Gupta <vgupta@synopsys.com> # v1
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Jan Kara <jack@suse.cz>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-nvdimm@lists.01.org
#Reviewed-by: Ira Weiny <ira.weiny@intel.com> # 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;
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* Re: [PATCH v3] arch/arc: add copy_user_page() to <asm/page.h> to fix build error on ARC
2021-01-05 3:44 [PATCH v3] arch/arc: add copy_user_page() to <asm/page.h> to fix build error on ARC Randy Dunlap
@ 2021-01-05 5:07 ` Vineet Gupta
0 siblings, 0 replies; 2+ messages in thread
From: Vineet Gupta @ 2021-01-05 5:07 UTC (permalink / raw)
To: Randy Dunlap, linux-kernel
Cc: kernel test robot, linux-snps-arc, Andrew Morton, Matthew Wilcox,
Jan Kara, linux-fsdevel, linux-nvdimm
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@intel.com>
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: Vineet Gupta <vgupta@synopsys.com>
> Cc: linux-snps-arc@lists.infradead.org
> Cc: Dan Williams <dan.j.williams@intel.com>
> #Acked-by: Vineet Gupta <vgupta@synopsys.com> # v1
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Matthew Wilcox <willy@infradead.org>
> Cc: Jan Kara <jack@suse.cz>
> Cc: linux-fsdevel@vger.kernel.org
> Cc: linux-nvdimm@lists.01.org
> #Reviewed-by: Ira Weiny <ira.weiny@intel.com> # 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;
>
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