From: Arnd Bergmann <arnd@arndb.de>
To: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: linux-nilfs@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Jeff Layton <jlayton@redhat.com>,
y2038@lists.linaro.org, linux-kernel@vger.kernel.org,
David Howells <dhowells@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH] nilfs2: use 64-bit superblock timstamps
Date: Wed, 20 Jun 2018 09:50:26 +0200 [thread overview]
Message-ID: <20180620075041.4154396-1-arnd@arndb.de> (raw)
The mount time field in the superblock uses a 64-bit timestamp, but
calling get_seconds() may truncate the current time to 32 bits.
This changes it to ktime_get_real_seconds() to avoid the potential
overflow.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
fs/nilfs2/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 6ffeca84d7c3..1b9067cf4511 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -834,7 +834,7 @@ static int nilfs_setup_super(struct super_block *sb, int is_mount)
sbp[0]->s_max_mnt_count = cpu_to_le16(NILFS_DFL_MAX_MNT_COUNT);
sbp[0]->s_mnt_count = cpu_to_le16(mnt_count + 1);
- sbp[0]->s_mtime = cpu_to_le64(get_seconds());
+ sbp[0]->s_mtime = cpu_to_le64(ktime_get_real_seconds());
skip_mount_setup:
sbp[0]->s_state =
--
2.9.0
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next reply other threads:[~2018-06-20 7:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-20 7:50 Arnd Bergmann [this message]
2018-06-21 2:41 ` [PATCH] nilfs2: use 64-bit superblock timstamps Ryusuke Konishi
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