ia64: Remove perfmon

perfmon has been marked broken and thus been disabled for all builds
for more than two years.  Remove it entirely.

Cc: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Enthusiastically-ACKed-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20200911094920.1173631-1-hch@lst.de

3 files changed, 1 insertions, 111 deletions

diff --git a/arch/ia64/oprofile/Makefile b/arch/ia64/oprofile/Makefile
index cd134d6643bf..fc7944d462f4 100644
--- a/arch/ia64/oprofile/Makefile
+++ b/arch/ia64/oprofile/Makefile
@@ -8,4 +8,3 @@ DRIVER_OBJS := $(addprefix ../../../drivers/oprofile/, \
 		timer_int.o )
 
 oprofile-y := $(DRIVER_OBJS) init.o backtrace.o
-oprofile-$(CONFIG_PERFMON) += perfmon.o
diff --git a/arch/ia64/oprofile/init.c b/arch/ia64/oprofile/init.c
index 31b545c35460..a692ba16a07b 100644
--- a/arch/ia64/oprofile/init.c
+++ b/arch/ia64/oprofile/init.c
@@ -18,21 +18,11 @@ extern void ia64_backtrace(struct pt_regs * const regs, unsigned int depth);
 
 int __init oprofile_arch_init(struct oprofile_operations *ops)
 {
-	int ret = -ENODEV;
-
-#ifdef CONFIG_PERFMON
-	/* perfmon_init() can fail, but we have no way to report it */
-	ret = perfmon_init(ops);
-#endif
 	ops->backtrace = ia64_backtrace;
-
-	return ret;
+	return -ENODEV;
 }
 
 
 void oprofile_arch_exit(void)
 {
-#ifdef CONFIG_PERFMON
-	perfmon_exit();
-#endif
 }
diff --git a/arch/ia64/oprofile/perfmon.c b/arch/ia64/oprofile/perfmon.c
deleted file mode 100644
index 192d3e8e1f65..000000000000
--- a/arch/ia64/oprofile/perfmon.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/**
- * @file perfmon.c
- *
- * @remark Copyright 2003 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/oprofile.h>
-#include <linux/sched.h>
-#include <asm/perfmon.h>
-#include <asm/ptrace.h>
-#include <asm/errno.h>
-
-static int allow_ints;
-
-static int
-perfmon_handler(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg,
-                struct pt_regs *regs, unsigned long stamp)
-{
-	int event = arg->pmd_eventid;
- 
-	arg->ovfl_ctrl.bits.reset_ovfl_pmds = 1;
-
-	/* the owner of the oprofile event buffer may have exited
-	 * without perfmon being shutdown (e.g. SIGSEGV)
-	 */
-	if (allow_ints)
-		oprofile_add_sample(regs, event);
-	return 0;
-}
-
-
-static int perfmon_start(void)
-{
-	allow_ints = 1;
-	return 0;
-}
-
-
-static void perfmon_stop(void)
-{
-	allow_ints = 0;
-}
-
-
-#define OPROFILE_FMT_UUID { \
-	0x77, 0x7a, 0x6e, 0x61, 0x20, 0x65, 0x73, 0x69, 0x74, 0x6e, 0x72, 0x20, 0x61, 0x65, 0x0a, 0x6c }
-
-static pfm_buffer_fmt_t oprofile_fmt = {
- 	.fmt_name 	    = "oprofile_format",
- 	.fmt_uuid	    = OPROFILE_FMT_UUID,
- 	.fmt_handler	    = perfmon_handler,
-};
-
-
-static char *get_cpu_type(void)
-{
-	__u8 family = local_cpu_data->family;
-
-	switch (family) {
-		case 0x07:
-			return "ia64/itanium";
-		case 0x1f:
-			return "ia64/itanium2";
-		default:
-			return "ia64/ia64";
-	}
-}
-
-
-/* all the ops are handled via userspace for IA64 perfmon */
-
-static int using_perfmon;
-
-int perfmon_init(struct oprofile_operations *ops)
-{
-	int ret = pfm_register_buffer_fmt(&oprofile_fmt);
-	if (ret)
-		return -ENODEV;
-
-	ops->cpu_type = get_cpu_type();
-	ops->start = perfmon_start;
-	ops->stop = perfmon_stop;
-	using_perfmon = 1;
-	printk(KERN_INFO "oprofile: using perfmon.\n");
-	return 0;
-}
-
-
-void perfmon_exit(void)
-{
-	if (!using_perfmon)
-		return;
-
-	pfm_unregister_buffer_fmt(oprofile_fmt.fmt_uuid);
-}