[PATCH 1/2] md: bcache: Replace get_seconds with ktime_get_seconds

[shraddha.6596]

From: Shraddha Barke <shraddha.6...@gmail.com>

32-bit systems using function get_seconds will break in the year 2038,
in order to avoid that replace the code with more appropriate
function ktime_get_seconds which is y2038 safe.
Function ktime_get_seconds is used since it uses monotonic instead of
real time and thus will not cause overflow.

Signed-off-by: Shraddha Barke <shraddha.6...@gmail.com>
---
 drivers/md/bcache/super.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 679a093..f4bd17d 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -188,7 +188,7 @@ static const char *read_super(struct cache_sb *sb, struct 
block_device *bdev,
                goto err;
        }
 
-       sb->last_mount = get_seconds();
+       sb->last_mount = ktime_get_seconds();
        err = NULL;
 
        get_page(bh->b_page);
@@ -696,7 +696,7 @@ static void bcache_device_detach(struct bcache_device *d)
 
                SET_UUID_FLASH_ONLY(u, 0);
                memcpy(u->uuid, invalid_uuid, 16);
-               u->invalidated = cpu_to_le32(get_seconds());
+               u->invalidated = cpu_to_le32(ktime_get_seconds());
                bch_uuid_write(d->c);
        }
 
@@ -927,7 +927,7 @@ void bch_cached_dev_detach(struct cached_dev *dc)
 
 int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c)
 {
-       uint32_t rtime = cpu_to_le32(get_seconds());
+       uint32_t rtime = cpu_to_le32(ktime_get_seconds());
        struct uuid_entry *u;
        char buf[BDEVNAME_SIZE];
 
@@ -959,7 +959,7 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct 
cache_set *c)
            (BDEV_STATE(&dc->sb) == BDEV_STATE_STALE ||
             BDEV_STATE(&dc->sb) == BDEV_STATE_NONE)) {
                memcpy(u->uuid, invalid_uuid, 16);
-               u->invalidated = cpu_to_le32(get_seconds());
+               u->invalidated = cpu_to_le32(ktime_get_seconds());
                u = NULL;
        }
 
@@ -1261,7 +1261,7 @@ int bch_flash_dev_create(struct cache_set *c, uint64_t 
size)
 
        get_random_bytes(u->uuid, 16);
        memset(u->label, 0, 32);
-       u->first_reg = u->last_reg = cpu_to_le32(get_seconds());
+       u->first_reg = u->last_reg = cpu_to_le32(ktime_get_seconds());
 
        SET_UUID_FLASH_ONLY(u, 1);
        u->sectors = size >> 9;
@@ -1670,7 +1670,7 @@ static void run_cache_set(struct cache_set *c)
                goto err;
 
        closure_sync(&cl);
-       c->sb.last_mount = get_seconds();
+       c->sb.last_mount = ktime_get_seconds();
        bcache_write_super(c);
 
        list_for_each_entry_safe(dc, t, &uncached_devices, list)
-- 
2.1.4

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