Re: [PATCH 31/52] dax: Pass dax_dev to dax_writeback_mapping_range()

From: kbuild test robot
Date: Tue Dec 11 2018 - 12:39:34 EST

Hi Vivek,

I love your patch! Perhaps something to improve:

[auto build test WARNING on fuse/for-next]
[also build test WARNING on v4.20-rc6]
[cannot apply to next-20181211]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

base: for-next
config: arm64-allmodconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
wget -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=7.2.0 make.cross ARCH=arm64

All warnings (new ones prefixed by >>):

fs/ext2/inode.c: In function 'ext2_dax_writepages':
fs/ext2/inode.c:959:33: error: passing argument 3 of 'dax_writeback_mapping_range' from incompatible pointer type [-Werror=incompatible-pointer-types]
mapping->host->i_sb->s_bdev, wbc);
In file included from fs/ext2/inode.c:29:0:
include/linux/dax.h:87:5: note: expected 'struct dax_device *' but argument is of type 'struct writeback_control *'
int dax_writeback_mapping_range(struct address_space *mapping,
fs/ext2/inode.c:958:9: error: too few arguments to function 'dax_writeback_mapping_range'
return dax_writeback_mapping_range(mapping,
In file included from fs/ext2/inode.c:29:0:
include/linux/dax.h:87:5: note: declared here
int dax_writeback_mapping_range(struct address_space *mapping,
>> fs/ext2/inode.c:960:1: warning: control reaches end of non-void function [-Wreturn-type]
cc1: some warnings being treated as errors

vim +960 fs/ext2/inode.c

7f6d5b52 Ross Zwisler 2016-02-26 954
fb094c90 Dan Williams 2017-12-21 955 static int
fb094c90 Dan Williams 2017-12-21 956 ext2_dax_writepages(struct address_space *mapping, struct writeback_control *wbc)
fb094c90 Dan Williams 2017-12-21 957 {
fb094c90 Dan Williams 2017-12-21 @958 return dax_writeback_mapping_range(mapping,
fb094c90 Dan Williams 2017-12-21 959 mapping->host->i_sb->s_bdev, wbc);
^1da177e Linus Torvalds 2005-04-16 @960 }
^1da177e Linus Torvalds 2005-04-16 961

:::::: The code at line 960 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>

0-DAY kernel test infrastructure Open Source Technology Center Intel Corporation

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