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SubjectRe: [PATCH v6 11/15] mm, fs, dax: handle layout changes to pinned dax mappings
Hi Dan,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.16-rc5 next-20180316]
[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/Dan-Williams/dax-fix-dma-vs-truncate-hole-punch/20180318-050250
config: x86_64-randconfig-x010-201811 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

drivers/dax/super.c: In function 'generic_dax_pagefree':
>> drivers/dax/super.c:170:2: error: implicit declaration of function 'wake_up_var'; did you mean 'wake_up_nr'? [-Werror=implicit-function-declaration]
wake_up_var(&page->_refcount);
^~~~~~~~~~~
wake_up_nr
cc1: some warnings being treated as errors

vim +170 drivers/dax/super.c

166
167 #if IS_ENABLED(CONFIG_FS_DAX)
168 static void generic_dax_pagefree(struct page *page, void *data)
169 {
> 170 wake_up_var(&page->_refcount);
171 }
172

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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