mmtimer: Remove the SGI SN2 mmtimer driver
This driver supports direct system clock access on the ancient SGI SN2
IA64 systems, and implement the only non-builtin k_clock instance.
Remove it as any remaining IA64 altix user will be running just as old
distros anyway.
Dimitri Sivanich stated: "Since this is SN2 specific, this can be removed."
Note that this does not affect the never uv_mmtimer driver for x86-based
Altix systems.
[ tglx: Added comment to CLOCK_SGI_CYCLE ]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Travis <mike.travis@hpe.com>
Cc: Dimitri Sivanich <sivanich@hpe.com>
Link: http://lkml.kernel.org/r/20170526090311.3377-2-hch@lst.de
diff --git a/include/uapi/linux/time.h b/include/uapi/linux/time.h
index e75e1b6..09299fc 100644
--- a/include/uapi/linux/time.h
+++ b/include/uapi/linux/time.h
@@ -54,7 +54,11 @@ struct itimerval {
#define CLOCK_BOOTTIME 7
#define CLOCK_REALTIME_ALARM 8
#define CLOCK_BOOTTIME_ALARM 9
-#define CLOCK_SGI_CYCLE 10 /* Hardware specific */
+/*
+ * The driver implementing this got removed. The clock ID is kept as a
+ * place holder. Do not reuse!
+ */
+#define CLOCK_SGI_CYCLE 10
#define CLOCK_TAI 11
#define MAX_CLOCKS 16