| From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
| From: Lina Iyer <ilina@codeaurora.org> |
| Date: Thu, 5 Nov 2020 13:41:07 -0700 |
| Subject: NOUPSTREAM: ANDROID: arm: allow hooks into ipi |
| |
| Allow drivers to register hooks when IPIs are sent and handled. The |
| statistics of these IPIs are helpful in predicting CPU idle states. |
| |
| [CPNOTE: 03/06/21] Lee: Still exported in `aosp/android13-5.10` |
| |
| Bug: 172588415 |
| Signed-off-by: Lina Iyer <ilina@codeaurora.org> |
| Change-Id: I3706743ee4077157f8205870cecfff92841f40ce |
| --- |
| arch/arm/kernel/smp.c | 4 ++++ |
| 1 file changed, 4 insertions(+) |
| |
| diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c |
| --- a/arch/arm/kernel/smp.c |
| +++ b/arch/arm/kernel/smp.c |
| @@ -51,6 +51,10 @@ |
| #define CREATE_TRACE_POINTS |
| #include <trace/events/ipi.h> |
| |
| +EXPORT_TRACEPOINT_SYMBOL_GPL(ipi_raise); |
| +EXPORT_TRACEPOINT_SYMBOL_GPL(ipi_entry); |
| +EXPORT_TRACEPOINT_SYMBOL_GPL(ipi_exit); |
| + |
| /* |
| * as from 2.5, kernels no longer have an init_tasks structure |
| * so we need some other way of telling a new secondary core |
