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authorBenjamin Gray <bgray@linux.ibm.com>2023-08-01 04:17:44 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2023-08-16 16:54:50 +0300
commit53834a0c09252dea7918a9e1788bad880690900b (patch)
tree3fb71f391ecb4e6572e3683154f06b508c1063d7 /kernel/events
parent58709f6fc327a997daeeca77aa5e6bd4d4c238cf (diff)
downloadlinux-53834a0c09252dea7918a9e1788bad880690900b.tar.xz
perf/hw_breakpoint: Remove arch breakpoint hooks
PowerPC was the only user of these hooks, and has been refactored to no longer require them. There is no need to keep them around, so remove them to reduce complexity. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230801011744.153973-8-bgray@linux.ibm.com
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/hw_breakpoint.c28
1 files changed, 0 insertions, 28 deletions
diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index c3797701339c..6c2cb4e4f48d 100644
--- a/kernel/events/hw_breakpoint.c
+++ b/kernel/events/hw_breakpoint.c
@@ -523,26 +523,6 @@ toggle_bp_slot(struct perf_event *bp, bool enable, enum bp_type_idx type, int we
return 0;
}
-__weak int arch_reserve_bp_slot(struct perf_event *bp)
-{
- return 0;
-}
-
-__weak void arch_release_bp_slot(struct perf_event *bp)
-{
-}
-
-/*
- * Function to perform processor-specific cleanup during unregistration
- */
-__weak void arch_unregister_hw_breakpoint(struct perf_event *bp)
-{
- /*
- * A weak stub function here for those archs that don't define
- * it inside arch/.../kernel/hw_breakpoint.c
- */
-}
-
/*
* Constraints to check before allowing this new breakpoint counter.
*
@@ -594,7 +574,6 @@ static int __reserve_bp_slot(struct perf_event *bp, u64 bp_type)
enum bp_type_idx type;
int max_pinned_slots;
int weight;
- int ret;
/* We couldn't initialize breakpoint constraints on boot */
if (!constraints_initialized)
@@ -613,10 +592,6 @@ static int __reserve_bp_slot(struct perf_event *bp, u64 bp_type)
if (max_pinned_slots > hw_breakpoint_slots_cached(type))
return -ENOSPC;
- ret = arch_reserve_bp_slot(bp);
- if (ret)
- return ret;
-
return toggle_bp_slot(bp, true, type, weight);
}
@@ -634,8 +609,6 @@ static void __release_bp_slot(struct perf_event *bp, u64 bp_type)
enum bp_type_idx type;
int weight;
- arch_release_bp_slot(bp);
-
type = find_slot_idx(bp_type);
weight = hw_breakpoint_weight(bp);
WARN_ON(toggle_bp_slot(bp, false, type, weight));
@@ -645,7 +618,6 @@ void release_bp_slot(struct perf_event *bp)
{
struct mutex *mtx = bp_constraints_lock(bp);
- arch_unregister_hw_breakpoint(bp);
__release_bp_slot(bp, bp->attr.bp_type);
bp_constraints_unlock(mtx);
}