linux-kernel - [PATCH v2 01/12] nfsd: use ktime_get

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Message-Id: <20191213141046.1770441-2-arnd@arndb.de>
Date:   Fri, 13 Dec 2019 15:10:35 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     "J. Bruce Fields" <bfields@...ldses.org>,
        Chuck Lever <chuck.lever@...cle.com>
Cc:     linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        y2038@...ts.linaro.org, Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v2 01/12] nfsd: use ktime_get_seconds() for timestamps

The delegation logic in nfsd uses the somewhat inefficient
seconds_since_boot() function to record time intervals.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 fs/nfsd/nfs4state.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 369e574c5092..bfdb3366239c 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -806,7 +806,7 @@ static void nfs4_free_deleg(struct nfs4_stid *stid)
 static DEFINE_SPINLOCK(blocked_delegations_lock);
 static struct bloom_pair {
 	int	entries, old_entries;
-	time_t	swap_time;
+	time64_t swap_time;
 	int	new; /* index into 'set' */
 	DECLARE_BITMAP(set[2], 256);
 } blocked_delegations;
@@ -818,15 +818,15 @@ static int delegation_blocked(struct knfsd_fh *fh)
 
 	if (bd->entries == 0)
 		return 0;
-	if (seconds_since_boot() - bd->swap_time > 30) {
+	if (ktime_get_seconds() - bd->swap_time > 30) {
 		spin_lock(&blocked_delegations_lock);
-		if (seconds_since_boot() - bd->swap_time > 30) {
+		if (ktime_get_seconds() - bd->swap_time > 30) {
 			bd->entries -= bd->old_entries;
 			bd->old_entries = bd->entries;
 			memset(bd->set[bd->new], 0,
 			       sizeof(bd->set[0]));
 			bd->new = 1-bd->new;
-			bd->swap_time = seconds_since_boot();
+			bd->swap_time = ktime_get_seconds();
 		}
 		spin_unlock(&blocked_delegations_lock);
 	}
@@ -856,7 +856,7 @@ static void block_delegations(struct knfsd_fh *fh)
 	__set_bit((hash>>8)&255, bd->set[bd->new]);
 	__set_bit((hash>>16)&255, bd->set[bd->new]);
 	if (bd->entries == 0)
-		bd->swap_time = seconds_since_boot();
+		bd->swap_time = ktime_get_seconds();
 	bd->entries += 1;
 	spin_unlock(&blocked_delegations_lock);
 }
-- 
2.20.0