On Tue, Nov 08, 2016 at 11:05:52AM +0800, kbuild test robot wrote:
> Hi Naoya,
>
> [auto build test ERROR on mmotm/master]
> [also build test ERROR on v4.9-rc4 next-20161028]
> [if your patch is applied to the wrong git tree, please drop us a note to
> help improve the system]
>
> url:
> https://github.com/0day-ci/linux/commits/Naoya-Horiguchi/mm-x86-move-_PAGE_SWP_SOFT_DIRTY-from-bit-7-to-bit-6/20161108-080615
> base: git://git.cmpxchg.org/linux-mmotm.git master
> config: arm-at91_dt_defconfig (attached as .config)
> compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
> wget
> https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
> -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> make.cross ARCH=arm
>
> All errors (new ones prefixed by >>):
>
> In file included from fs/proc/task_mmu.c:14:0:
> include/linux/swapops.h: In function 'swp_entry_to_pmd':
> >> include/linux/swapops.h:216:14: error: empty scalar initializer
> pmd_t pmd = {};
> ^
> include/linux/swapops.h:216:14: note: (near initialization for 'pmd')
>
> vim +216 include/linux/swapops.h
>
> 210 {
> 211 return swp_entry(0, 0);
> 212 }
> 213
> 214 static inline pmd_t swp_entry_to_pmd(swp_entry_t entry)
> 215 {
> > 216 pmd_t pmd = {};
> 217
> 218 return pmd;
> 219 }
Here is an alternative:
diff --git a/include/linux/swapops.h b/include/linux/swapops.h
index db8a858cc6ff..748c9233b3a5 100644
--- a/include/linux/swapops.h
+++ b/include/linux/swapops.h
@@ -215,9 +215,7 @@ static inline swp_entry_t pmd_to_swp_entry(pmd_t pmd)
static inline pmd_t swp_entry_to_pmd(swp_entry_t entry)
{
- pmd_t pmd = {};
-
- return pmd;
+ return (pmd_t) { 0 };
}
static inline int is_pmd_migration_entry(pmd_t pmd)
Thanks,
Naoya Horiguchi
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
