[01/10] fs: Add current_fs_time_sec() function
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Message ID 1454479670-8204-2-git-send-email-deepa.kernel@gmail.com
State New
Headers show

Commit Message

Deepa Dinamani Feb. 3, 2016, 6:07 a.m. UTC
This is in preparation for the series that transitions
filesystem timestamps to use 64 bit time and hence make
them y2038 safe.

The function is meant to replace CURRENT_TIME_SEC macro.
The macro CURRENT_TIME_SEC does not represent filesystem times
correctly as it cannot perform range checks.
current_fs_time_sec() will be extended to include these.

CURRENT_TIME_SEC is also not y2038 safe. current_fs_time_sec()
will be transitioned to use 64 bit time along with vfs in a
separate series.

The function is inline for now to maintain similar performance
to that of the macro.

The function takes super block as a parameter to allow for
future range checking of filesystem timestamps.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
 include/linux/fs.h | 5 +++++
 1 file changed, 5 insertions(+)

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diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6a75571..4af612f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1407,6 +1407,11 @@  struct super_block {
 extern struct timespec current_fs_time(struct super_block *sb);
+static inline struct timespec current_fs_time_sec(struct super_block *sb)
+	return (struct timespec) { get_seconds(), 0 };
  * Snapshotting support.