Commit 07903ada authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Thomas Gleixner
Browse files

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: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarThomas 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
parent 08332893

drivers/char/Kconfig

+0 −9
Original line number Diff line number Diff line
@@ -539,15 +539,6 @@ config HANGCHECK_TIMER 
	  out to lunch past a certain margin.  It can reboot the system

	  or merely print a warning.



config MMTIMER

	tristate "MMTIMER Memory mapped RTC for SGI Altix"

	depends on IA64_GENERIC || IA64_SGI_SN2

	depends on POSIX_TIMERS

	default y

	help

	  The mmtimer device allows direct userspace access to the

	  Altix system timer.



config UV_MMTIMER

	tristate "UV_MMTIMER Memory mapped RTC for SGI UV"

	depends on X86_UV

drivers/char/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -10,7 +10,6 @@ obj-$(CONFIG_VIRTIO_CONSOLE) += virtio_console.o 
obj-$(CONFIG_RAW_DRIVER)	+= raw.o

obj-$(CONFIG_SGI_SNSC)		+= snsc.o snsc_event.o

obj-$(CONFIG_MSPEC)		+= mspec.o

obj-$(CONFIG_MMTIMER)		+= mmtimer.o

obj-$(CONFIG_UV_MMTIMER)	+= uv_mmtimer.o

obj-$(CONFIG_IBM_BSR)		+= bsr.o

obj-$(CONFIG_SGI_MBCS)		+= mbcs.o

drivers/char/mmtimer.c

deleted100644 → 0
+0 −858

File deleted.

Preview size limit exceeded, changes collapsed.

include/uapi/linux/time.h

+5 −1
Original line number Diff line number Diff line
@@ -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

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