On Fri, Apr 07, 2017 at 05:57:05PM -0700, Deepa Dinamani wrote:

btrfs_root_item maintains the ctime for root updates.
This is not part of vfs_inode.

Since current_time() uses struct inode* as an argument
as Linus suggested, this cannot be used to update root
times unless, we modify the signature to use inode.

Since btrfs uses nanosecond time granularity, it can also
use ktime_get_real_ts directly to obtain timestamp for
the root. It is necessary to use the timespec time api
here because the same btrfs_set_stack_timespec_*() apis
are used for vfs inode times as well. These can be
transitioned to using timespec64 when btrfs internally
changes to use timespec64 as well.

Signed-off-by: Deepa Dinamani <redacted>
Acked-by: David Sterba <dsterba@suse.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

I'm going to add the patch to my 4.12 queue and will let Andrew know.
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