The patch titled
Subject: fs/sysv/inode.c: use ktime_get_real_seconds() for superblock stamp
has been added to the -mm tree. Its filename is
sysvfs-use-ktime_get_real_seconds-for-superblock-stamp.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/sysvfs-use-ktime_get_real_seconds-for-superblock-stamp.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/sysvfs-use-ktime_get_real_seconds-for-superblock-stamp.patch
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------------------------------------------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: fs/sysv/inode.c: use ktime_get_real_seconds() for superblock stamp
get_seconds() is deprecated in favor of ktime_get_real_seconds(), which
returns a 64-bit timestamp.
In the SYSV file system, the superblock timestamp is only 32 bits wide,
and it is used to check whether a file system is clean, so the best
solution seems to be to force a wraparound and explicitly convert it to an
unsigned 32-bit value.
This is independent of the inode timestamps that are also 32-bit wide on
disk and that come from current_time().
Link: http://lkml.kernel.org/r/20180713145236.3152513-1-arnd@xxxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/sysv/inode.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff -puN fs/sysv/inode.c~sysvfs-use-ktime_get_real_seconds-for-superblock-stamp fs/sysv/inode.c
--- a/fs/sysv/inode.c~sysvfs-use-ktime_get_real_seconds-for-superblock-stamp
+++ a/fs/sysv/inode.c
@@ -35,7 +35,7 @@
static int sysv_sync_fs(struct super_block *sb, int wait)
{
struct sysv_sb_info *sbi = SYSV_SB(sb);
- unsigned long time = get_seconds(), old_time;
+ u32 time = (u32)ktime_get_real_seconds(), old_time;
mutex_lock(&sbi->s_lock);
@@ -46,8 +46,8 @@ static int sysv_sync_fs(struct super_blo
*/
old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
if (sbi->s_type == FSTYPE_SYSV4) {
- if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38 - old_time))
- *sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38 - time);
+ if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38u - old_time))
+ *sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38u - time);
*sbi->s_sb_time = cpu_to_fs32(sbi, time);
mark_buffer_dirty(sbi->s_bh2);
}
_
Patches currently in -mm which might be from arnd@xxxxxxxx are
kasan-only-select-slub_debug-with-sysfs=y.patch
firewire-use-64-bit-time_t-based-interfaces.patch
ocfs2-dlmglue-clean-up-timestamp-handling.patch
shmem-use-monotonic-time-for-i_generation.patch
mm-zsmalloc-make-several-functions-and-a-struct-static-fix.patch
procfs-uptime-use-ktime_get_boottime_ts64.patch
crash-print-timestamp-using-time64_t.patch
nilfs2-use-64-bit-superblock-timstamps.patch
hfs-hfsplus-follow-macos-time-behavior.patch
hfs-hfsplus-stop-using-timespec-based-interfaces.patch
reiserfs-use-monotonic-time-for-j_trans_start_time.patch
reiserfs-remove-obsolete-print_time-function.patch
reiserfs-change-j_timestamp-type-to-time64_t.patch
fat-propagate-64-bit-inode-timestamps.patch
adfs-use-timespec64-for-time-conversion.patch
sysvfs-use-ktime_get_real_seconds-for-superblock-stamp.patch
vmcore-hide-vmcoredd_mmap_dumps-for-nommu-builds.patch
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