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-rw-r--r--fs/namespace.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index dd9c93b5a9d5..7886176232c1 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2473,6 +2473,14 @@ long do_mount(const char *dev_name, const char *dir_name,
if (flags & MS_RDONLY)
mnt_flags |= MNT_READONLY;
+ /* The default atime for remount is preservation */
+ if ((flags & MS_REMOUNT) &&
+ ((flags & (MS_NOATIME | MS_NODIRATIME | MS_RELATIME |
+ MS_STRICTATIME)) == 0)) {
+ mnt_flags &= ~MNT_ATIME_MASK;
+ mnt_flags |= path.mnt->mnt_flags & MNT_ATIME_MASK;
+ }
+
flags &= ~(MS_NOSUID | MS_NOEXEC | MS_NODEV | MS_ACTIVE | MS_BORN |
MS_NOATIME | MS_NODIRATIME | MS_RELATIME| MS_KERNMOUNT |
MS_STRICTATIME);