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authorJohn Stultz <john.stultz@linaro.org>2017-05-12 10:58:18 -0700
committerJohn Stultz <john.stultz@linaro.org>2017-06-20 22:14:10 -0700
commit369adf04d80a7e179b9ea6d74cc01c233f142f47 (patch)
treedc387d94061dbfdb3a8ef7b442184c2dec9f0370 /kernel/time
parentfc6eead7c1e2e5376c25d2795d4539fdacbc0648 (diff)
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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@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Miroslav Lichvar <mlichvar@redhat.com> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/timekeeping.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 0454bfa24353..cedafa008de5 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)
{