android-mainline/NOUPSTREAM-ANDROID-arm64-ARM64-Exports.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@google.com>
Date: Tue, 20 Oct 2020 19:46:17 +0200
Subject: NOUPSTREAM: ANDROID: arm64: ARM64 Exports

Export dump_backtrace symbol for modules to reference.

[added again as it moved around in 5.10-rc1]

[CPNOTE: 03/06/21] Lee: Pinged Greg for status
[CPNOTE: 05/08/21] Lee: GKI export

Squash:
  NOUPSTREAM: ANDROID: arm64: debug-monitors: export break hook APIs
  NOUPSTREAM: ANDROID: arm64: allow hooks into ipi
  NOUPSTREAM: ANDROID: arm64: Export show_regs for vendor module usage
  NOUPSTREAM: ANDROID: ipi: Add function to return nr_ipi and ipi_desc

Bug: 169899018
Bug: 172588415
Bug: 177348820
Bug: 177393446
Bug: 169899018
Change-Id: I8448584ed8af204deaa991c5a60b04a39b47ac2f
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm64/include/asm/smp.h       |  2 ++
 arch/arm64/kernel/debug-monitors.c |  4 ++++
 arch/arm64/kernel/process.c        |  1 +
 arch/arm64/kernel/smp.c            | 15 +++++++++++++++
 arch/arm64/kernel/stacktrace.c     |  1 +
 5 files changed, 23 insertions(+)

diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h
--- a/arch/arm64/include/asm/smp.h
+++ b/arch/arm64/include/asm/smp.h
@@ -87,6 +87,8 @@ extern void secondary_entry(void);
 
 extern void arch_send_call_function_single_ipi(int cpu);
 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+extern int nr_ipi_get(void);
+extern struct irq_desc **ipi_desc_get(void);
 
 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -283,21 +283,25 @@ void register_user_break_hook(struct break_hook *hook)
 {
 	register_debug_hook(&hook->node, &user_break_hook);
 }
+EXPORT_SYMBOL_GPL(register_user_break_hook);
 
 void unregister_user_break_hook(struct break_hook *hook)
 {
 	unregister_debug_hook(&hook->node);
 }
+EXPORT_SYMBOL_GPL(unregister_user_break_hook);
 
 void register_kernel_break_hook(struct break_hook *hook)
 {
 	register_debug_hook(&hook->node, &kernel_break_hook);
 }
+EXPORT_SYMBOL_GPL(register_kernel_break_hook);
 
 void unregister_kernel_break_hook(struct break_hook *hook)
 {
 	unregister_debug_hook(&hook->node);
 }
+EXPORT_SYMBOL_GPL(unregister_kernel_break_hook);
 
 static int call_break_hook(struct pt_regs *regs, unsigned int esr)
 {
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -247,6 +247,7 @@ void show_regs(struct pt_regs *regs)
 	__show_regs(regs);
 	dump_backtrace(regs, NULL, KERN_DEFAULT);
 }
+EXPORT_SYMBOL_GPL(show_regs);
 
 static void tls_thread_flush(void)
 {
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -58,6 +58,9 @@
 
 DEFINE_PER_CPU_READ_MOSTLY(int, cpu_number);
 EXPORT_PER_CPU_SYMBOL(cpu_number);
+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
@@ -1107,3 +1110,15 @@ bool cpus_are_stuck_in_kernel(void)
 	return !!cpus_stuck_in_kernel || smp_spin_tables ||
 		is_protected_kvm_enabled();
 }
+
+int nr_ipi_get(void)
+{
+	return nr_ipi;
+}
+EXPORT_SYMBOL_GPL(nr_ipi_get);
+
+struct irq_desc **ipi_desc_get(void)
+{
+	return ipi_desc;
+}
+EXPORT_SYMBOL_GPL(ipi_desc_get);
diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -214,6 +214,7 @@ void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
 
 	put_task_stack(tsk);
 }
+EXPORT_SYMBOL_GPL(dump_backtrace);
 
 void show_stack(struct task_struct *tsk, unsigned long *sp, const char *loglvl)
 {