Commit-ID: 369adf04d80a7e179b9ea6d74cc01c233f142f47
Gitweb: http://git.kernel.org/tip/369adf04d80a7e179b9ea6d74cc01c233f142f47
Author: John Stultz <john.stultz@xxxxxxxxxx>
AuthorDate: Fri, 12 May 2017 10:58:18 -0700
Committer: John Stultz <john.stultz@xxxxxxxxxx>
CommitDate: Tue, 20 Jun 2017 22:14:10 -0700
time: Add warning about imminent deprecation of CONFIG_GENERIC_TIME_VSYSCALL_OLD
CONFIG_GENERIC_TIME_VSYSCALL_OLD was introduced five years ago
to allow a transition from the old vsyscall implementations to
the new method (which simplified internal accounting and made
timekeeping more precise).
However, PPC and IA64 have yet to make the transition, despite
in some cases me sending test patches to try to help it along.
http://patches.linaro.org/patch/30501/
http://patches.linaro.org/patch/35412/
If its helpful, my last pass at the patches can be found here:
https://git.linaro.org/people/john.stultz/linux.git dev/oldvsyscall-cleanup
So I think its time to set a deadline and make it clear this
is going away. So this patch adds warnings about this
functionality being dropped. Likely to be in v4.15.
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
Cc: Richard Cochran <richardcochran@xxxxxxxxx>
Cc: Prarit Bhargava <prarit@xxxxxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Anton Blanchard <anton@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
kernel/time/timekeeping.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 0454bfa..cedafa0 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -516,6 +516,7 @@ static void halt_fast_timekeeper(struct timekeeper *tk)
}
#ifdef CONFIG_GENERIC_TIME_VSYSCALL_OLD
+#warning Please contact your maintainers, as GENERIC_TIME_VSYSCALL_OLD compatibity will disappear soon.
static inline void update_vsyscall(struct timekeeper *tk)
{
--
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