Use 64-bit timekeeping

This patch changes the use of struct timespec in
dccp_probe to use struct timespec64 instead. timespec uses a 32-bit
seconds field which will overflow in the year 2038 and beyond. timespec64
uses a 64-bit seconds field. Note that the correctness of the code isn't
changed, since the original code only uses the timestamps to compute a
small elapsed interval. This patch is part of a larger attempt to remove
instances of 32-bit timekeeping structures (timespec, timeval, time_t)
from the kernel so it is easier to identify where the real 2038 issues
are.

Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 5 deletions

diff --git a/net/dccp/probe.c b/net/dccp/probe.c
index d8346d0eadeb..3d3fda05b32d 100644
--- a/net/dccp/probe.c
+++ b/net/dccp/probe.c
@@ -30,6 +30,7 @@
 #include <linux/module.h>
 #include <linux/kfifo.h>
 #include <linux/vmalloc.h>
+#include <linux/time64.h>
 #include <linux/gfp.h>
 #include <net/net_namespace.h>
 
@@ -47,20 +48,20 @@ static struct {
         struct kfifo      fifo;
         spinlock_t        lock;
         wait_queue_head_t wait;
-        struct timespec   tstart;
+        struct timespec64 tstart;
 } dccpw;
 
 static void printl(const char *fmt, ...)
 {
         va_list args;
         int len;
-        struct timespec now;
+        struct timespec64 now;
         char tbuf[256];
 
         va_start(args, fmt);
-        getnstimeofday(&now);
+        getnstimeofday64(&now);
 
-        now = timespec_sub(now, dccpw.tstart);
+        now = timespec64_sub(now, dccpw.tstart);
 
         len = sprintf(tbuf, "%lu.%06lu ",
                       (unsigned long) now.tv_sec,
@@ -110,7 +111,7 @@ static struct jprobe dccp_send_probe = {
 static int dccpprobe_open(struct inode *inode, struct file *file)
 {
         kfifo_reset(&dccpw.fifo);
-        getnstimeofday(&dccpw.tstart);
+        getnstimeofday64(&dccpw.tstart);
         return 0;
 }