linux-kernel - [PATCH v3] misc: ibmasm: Replace timeval with timespec64

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20151023150749.GA13762@amitoj-Inspiron-3542>
Date:	Fri, 23 Oct 2015 20:37:49 +0530
From:	Amitoj Kaur Chawla <amitoj1606@...il.com>
To:	outreachy-kernel@...glegroups.com
Cc:	arnd@...db.de, gregkh@...uxfoundation.org, y2038@...ts.linaro.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3] misc: ibmasm: Replace timeval with timespec64

This patch replaces timeval with timespec64 as 32 bit 'struct timeval'
will not give current time beyond 2038.

The patch changes the code to use ktime_get_real_ts64() which returns
a 'struct timespec64' instead of do_gettimeofday() which returns a
'struct timeval'

This patch also alters the format strings in sprintf() for now.tv_sec
and now.tv_nsec to incorporate 'long long' on 32 bit architectures and
leading zeroes respectively.

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@...il.com>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
---
Changes in v2:
        -change format string of now.tv_sec to '%llu'
        -change format string of now.tv_nsec to '%.08lu'
Changes in v3:
        -Replace tv_usec with tv_nsec, error made in v2
        -Build tested

 drivers/misc/ibmasm/ibmasm.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h
index 9b08344..82380ae 100644
--- a/drivers/misc/ibmasm/ibmasm.h
+++ b/drivers/misc/ibmasm/ibmasm.h
@@ -34,6 +34,7 @@
 #include <linux/kref.h>
 #include <linux/device.h>
 #include <linux/input.h>
+#include <linux/time64.h>
 
 /* Driver identification */
 #define DRIVER_NAME	"ibmasm"
@@ -53,9 +54,10 @@ extern int ibmasm_debug;
 
 static inline char *get_timestamp(char *buf)
 {
-	struct timeval now;
-	do_gettimeofday(&now);
-	sprintf(buf, "%lu.%lu", now.tv_sec, now.tv_usec);
+	struct timespec64 now;
+	ktime_get_real_ts64(&now);
+	sprintf(buf, "%llu.%.08lu", (long long)now.tv_sec, 
+					now.tv_nsec / NSEC_PER_USEC);
 	return buf;
 }
 
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/