[PATCH tip/x86/entry] Fix user return notifier build

[Avi Kivity]

When CONFIG_USER_RETURN_NOTIFIER is set, we need to link
kernel/user-return-notifier.o.

Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
 kernel/Makefile |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/Makefile b/kernel/Makefile
index b8d4cd8..0ae57a8 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_RING_BUFFER) += trace/
 obj-$(CONFIG_SMP) += sched_cpupri.o
 obj-$(CONFIG_SLOW_WORK) += slow-work.o
 obj-$(CONFIG_PERF_EVENTS) += perf_event.o
+obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
 
 ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
 # According to Alan Modra <alan@xxxxxxxxxxxxxxxx>, the -fno-omit-frame-pointer is
-- 
1.6.4.1

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