staging/lustre: use 64-bit times in ptlrpc_enc_page_pool

ptlrpc_enc_page_pool computes time deltas using 'long' values from
get_seconds(). This is probably safe beyond y2038, but it's better
to go use monotonic times and 64-bit here for consistency.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
index 2ee3e8b2e879eac164aa73e7454fd5393d89c416..56dab9db4157264da606d9c1bb5adc5798f0d43f 100644 (file)
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
@@ -92,8 +92,8 @@ static struct ptlrpc_enc_page_pool {
        unsigned long    epp_idle_idx;
 
        /* last shrink time due to mem tight */
-       long         epp_last_shrink;
-       long         epp_last_access;
+       time64_t         epp_last_shrink;
+       time64_t         epp_last_access;
 
        /*
         * in-pool pages bookkeeping
@@ -153,8 +153,8 @@ int sptlrpc_proc_enc_pool_seq_show(struct seq_file *m, void *v)
                   page_pools.epp_total_pages,
                   page_pools.epp_free_pages,
                   page_pools.epp_idle_idx,
-                  get_seconds() - page_pools.epp_last_shrink,
-                  get_seconds() - page_pools.epp_last_access,
+                  (long)(ktime_get_seconds() - page_pools.epp_last_shrink),
+                  (long)(ktime_get_seconds() - page_pools.epp_last_access),
                   page_pools.epp_st_max_pages,
                   page_pools.epp_st_grows,
                   page_pools.epp_st_grow_fails,
@@ -226,7 +226,7 @@ static unsigned long enc_pools_shrink_count(struct shrinker *s,
         * if no pool access for a long time, we consider it's fully idle.
         * a little race here is fine.
         */
-       if (unlikely(get_seconds() - page_pools.epp_last_access >
+       if (unlikely(ktime_get_seconds() - page_pools.epp_last_access >
                     CACHE_QUIESCENT_PERIOD)) {
                spin_lock(&page_pools.epp_lock);
                page_pools.epp_idle_idx = IDLE_IDX_MAX;
@@ -253,7 +253,7 @@ static unsigned long enc_pools_shrink_scan(struct shrinker *s,
                       (long)sc->nr_to_scan, page_pools.epp_free_pages);
 
                page_pools.epp_st_shrinks++;
-               page_pools.epp_last_shrink = get_seconds();
+               page_pools.epp_last_shrink = ktime_get_seconds();
        }
        spin_unlock(&page_pools.epp_lock);
 
@@ -261,7 +261,7 @@ static unsigned long enc_pools_shrink_scan(struct shrinker *s,
         * if no pool access for a long time, we consider it's fully idle.
         * a little race here is fine.
         */
-       if (unlikely(get_seconds() - page_pools.epp_last_access >
+       if (unlikely(ktime_get_seconds() - page_pools.epp_last_access >
                     CACHE_QUIESCENT_PERIOD)) {
                spin_lock(&page_pools.epp_lock);
                page_pools.epp_idle_idx = IDLE_IDX_MAX;
@@ -457,7 +457,7 @@ static inline void enc_pools_wakeup(void)
        }
 }
 
-static int enc_pools_should_grow(int page_needed, long now)
+static int enc_pools_should_grow(int page_needed, time64_t now)
 {
        /* don't grow if someone else is growing the pools right now,
         * or the pools has reached its full capacity
@@ -521,7 +521,7 @@ again:
                if (tick == 0)
                        tick = cfs_time_current();
 
-               now = get_seconds();
+               now = ktime_get_seconds();
 
                page_pools.epp_st_missings++;
                page_pools.epp_pages_short += desc->bd_iov_count;
@@ -600,7 +600,7 @@ again:
                                   this_idle) /
                                  (IDLE_IDX_WEIGHT + 1);
 
-       page_pools.epp_last_access = get_seconds();
+       page_pools.epp_last_access = ktime_get_seconds();
 
        spin_unlock(&page_pools.epp_lock);
        return 0;
@@ -725,8 +725,8 @@ int sptlrpc_enc_pool_init(void)
        page_pools.epp_growing = 0;
 
        page_pools.epp_idle_idx = 0;
-       page_pools.epp_last_shrink = get_seconds();
-       page_pools.epp_last_access = get_seconds();
+       page_pools.epp_last_shrink = ktime_get_seconds();
+       page_pools.epp_last_access = ktime_get_seconds();
 
        spin_lock_init(&page_pools.epp_lock);
        page_pools.epp_total_pages = 0;