The patch titled
Subject: fs: btrfs: use ktime_get_real_ts for root ctime
has been added to the -mm tree. Its filename is
fs-btrfs-use-ktime_get_real_ts-for-root-ctime.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fs-btrfs-use-ktime_get_real_ts-for-root-ctime.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fs-btrfs-use-ktime_get_real_ts-for-root-ctime.patch
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------------------------------------------------------
From: Deepa Dinamani <deepa.kernel@xxxxxxxxx>
Subject: fs: btrfs: use ktime_get_real_ts for root ctime
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.
Link: http://lkml.kernel.org/r/1491613030-11599-8-git-send-email-deepa.kernel@xxxxxxxxx
Signed-off-by: Deepa Dinamani <deepa.kernel@xxxxxxxxx>
Acked-by: David Sterba <dsterba@xxxxxxxx>
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Chris Mason <clm@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/root-tree.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN fs/btrfs/root-tree.c~fs-btrfs-use-ktime_get_real_ts-for-root-ctime fs/btrfs/root-tree.c
--- a/fs/btrfs/root-tree.c~fs-btrfs-use-ktime_get_real_ts-for-root-ctime
+++ a/fs/btrfs/root-tree.c
@@ -501,8 +501,9 @@ void btrfs_update_root_times(struct btrf
struct btrfs_root *root)
{
struct btrfs_root_item *item = &root->root_item;
- struct timespec ct = current_fs_time(root->fs_info->sb);
+ struct timespec ct;
+ ktime_get_real_ts(&ct);
spin_lock(&root->root_item_lock);
btrfs_set_root_ctransid(item, trans->transid);
btrfs_set_stack_timespec_sec(&item->ctime, ct.tv_sec);
_
Patches currently in -mm which might be from deepa.kernel@xxxxxxxxx are
fs-f2fs-use-ktime_get_real_seconds-for-sit_info-times.patch
trace-make-trace_hwlat-timestamp-y2038-safe.patch
fs-cifs-replace-current_time-by-other-appropriate-apis.patch
fs-ceph-current_time-with-ktime_get_real_ts.patch
fs-ufs-use-ktime_get_real_ts64-for-birthtime.patch
audit-use-timespec64-to-represent-audit-timestamps.patch
fs-btrfs-use-ktime_get_real_ts-for-root-ctime.patch
fs-ubifs-replace-current_time_sec-with-current_time.patch
lustre-replace-current_time-macro.patch
apparmorfs-replace-current_time-with-current_time.patch
time-delete-current_time_sec-and-current_time.patch
time-delete-current_fs_time-function.patch
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