ARM: pmu: remove unused reservation mechanism

The PMU reservation mechanism was originally intended to allow OProfile
and perf-events to co-ordinate over access to the CPU PMU. Since then,
OProfile for ARM has moved to using perf as its backend, so the
reservation code is no longer used.

This patch removes the reservation code for the CPU PMU on ARM.

Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 0 insertions, 36 deletions

diff --git a/arch/arm/kernel/pmu.c b/arch/arm/kernel/pmu.c
deleted file mode 100644
index 2334bf8a650a..000000000000
--- a/arch/arm/kernel/pmu.c
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- *  linux/arch/arm/kernel/pmu.c
- *
- *  Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles
- *  Copyright (C) 2010 ARM Ltd, Will Deacon
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-
-#include <asm/pmu.h>
-
-/*
- * PMU locking to ensure mutual exclusion between different subsystems.
- */
-static unsigned long pmu_lock[BITS_TO_LONGS(ARM_NUM_PMU_DEVICES)];
-
-int
-reserve_pmu(enum arm_pmu_type type)
-{
-	return test_and_set_bit_lock(type, pmu_lock) ? -EBUSY : 0;
-}
-EXPORT_SYMBOL_GPL(reserve_pmu);
-
-void
-release_pmu(enum arm_pmu_type type)
-{
-	clear_bit_unlock(type, pmu_lock);
-}
-EXPORT_SYMBOL_GPL(release_pmu);