linux-kernel - [PATCH net-next 2/3] ipv6: xfrm: use 64-bit timestamps

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Message-Id: <20180618152242.1566661-2-arnd@arndb.de>
Date:   Mon, 18 Jun 2018 17:22:14 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Steffen Klassert <steffen.klassert@...unet.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Cc:     y2038@...ts.linaro.org, Arnd Bergmann <arnd@...db.de>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Hans Liljestrand <ishkamiel@...il.com>,
        Kees Cook <keescook@...omium.org>,
        "Reshetova, Elena" <elena.reshetova@...el.com>,
        Florian Westphal <fw@...len.de>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 2/3] ipv6: xfrm: use 64-bit timestamps

get_seconds() is deprecated because it can overflow on 32-bit
architectures.  For the xfrm_state->lastused member, we treat the data
as a 64-bit number already, so we just need to use the right accessor
that works on both 32-bit and 64-bit machines.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 include/net/xfrm.h       | 2 +-
 net/ipv6/xfrm6_mode_ro.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 557122846e0e..d9031415402f 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -225,7 +225,7 @@ struct xfrm_state {
 	long		saved_tmo;
 
 	/* Last used time */
-	unsigned long		lastused;
+	time64_t		lastused;
 
 	struct page_frag xfrag;
 
diff --git a/net/ipv6/xfrm6_mode_ro.c b/net/ipv6/xfrm6_mode_ro.c
index 07d36573f50b..da28e4407b8f 100644
--- a/net/ipv6/xfrm6_mode_ro.c
+++ b/net/ipv6/xfrm6_mode_ro.c
@@ -55,7 +55,7 @@ static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb)
 	__skb_pull(skb, hdr_len);
 	memmove(ipv6_hdr(skb), iph, hdr_len);
 
-	x->lastused = get_seconds();
+	x->lastused = ktime_get_real_seconds();
 
 	return 0;
 }
-- 
2.9.0