On 2/2/2018 10:18 AM, Pravin Shelar wrote:
On Tue, Jan 30, 2018 at 4:40 PM, Gregory Rose <gvrose8...@gmail.com> wrote:
On 1/30/2018 3:40 PM, Greg Rose wrote:
From: Arnd Bergmann <a...@arndb.de>

Upstream commit:
      commit 311af51dcb5629f04976a8e451673f77e3301041
      Author: Arnd Bergmann <a...@arndb.de>
      Date:   Mon Nov 27 12:41:38 2017 +0100

      openvswitch: use ktime_get_ts64() instead of ktime_get_ts()

      timespec is deprecated because of the y2038 overflow, so let's
convert
      this one to ktime_get_ts64(). The code is already safe even on 32-bit
      architectures, since it uses monotonic times. On 64-bit
architectures,
      nothing changes, while on 32-bit architectures this avoids one
      type conversion.

      Signed-off-by: Arnd Bergmann <a...@arndb.de>
      Signed-off-by: David S. Miller <da...@davemloft.net>

Additional compatability check for ktime_get_ts64() exists or not.
If not, then just continue using ktime_get_ts().

Cc: Arnd Bergmann <a...@arndb.de>
Signed-off-by: Greg Rose <gvrose8...@gmail.com>

Oops, I screwed this up.  ktime_get_ts64 isn't a macro.  We'll need this
incremental...

diff --git a/acinclude.m4 b/acinclude.m4
index bc1ec72..5c63222 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -807,6 +807,9 @@ AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
    OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
                    [ktime_get_ns],
                    [OVS_DEFINE([HAVE_KTIME_GET_NS])])
+  OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
+                  [ktime_get_ts64],
+                  [OVS_DEFINE([HAVE_KTIME_GET_TS64])])

    if cmp -s datapath/linux/kcompat.h.new \
              datapath/linux/kcompat.h >/dev/null 2>&1; then
diff --git a/datapath/flow.c b/datapath/flow.c
index 385e481..cd8d422 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -52,7 +52,7 @@
  #include "flow_netlink.h"
  #include "vport.h"

-#ifndef ktime_get_ts64
+#ifndef HAVE_KTIME_GET_TS64
  #define ktime_get_ts64 ktime_get_ts
  #define timespec64 timespec
  #endif



---
   datapath/flow.c | 11 ++++++++---
   1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/datapath/flow.c b/datapath/flow.c
index 5da7e3e..385e481 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -52,14 +52,19 @@
   #include "flow_netlink.h"
   #include "vport.h"
   +#ifndef ktime_get_ts64
+#define ktime_get_ts64 ktime_get_ts
+#define timespec64 timespec
+#endif
+
This is done in compat code, can you move it to respective header file?

Yes - my own preference is to keep these sorts of things close to where they're used but I suppose there is a good chance we'll use ktime_get_ts64 elsewhere in the future.  So
that's fine by me.

Thanks,

- Greg

   u64 ovs_flow_used_time(unsigned long flow_jiffies)
   {
-       struct timespec cur_ts;
+       struct timespec64 cur_ts;
         u64 cur_ms, idle_ms;
   -     ktime_get_ts(&cur_ts);
+       ktime_get_ts64(&cur_ts);
         idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
-       cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
+       cur_ms = (u64)(u32)cur_ts.tv_sec * MSEC_PER_SEC +
                  cur_ts.tv_nsec / NSEC_PER_MSEC;
         return cur_ms - idle_ms;

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