linux-kernel - [PATCH] arm64/stacktrace: Export save_stack_trace

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Date:   Fri,  1 Mar 2019 15:00:41 -0500
From:   William Cohen <wcohen@...hat.com>
To:     catalin.marinas@....com, will.deacon@....com,
        linux-kernel@...r.kernel.org
Cc:     William Cohen <wcohen@...hat.com>
Subject: [PATCH] arm64/stacktrace: Export save_stack_trace_regs()

The ARM64 implements the save_stack_trace_regs function, but it is
unusable for any diagnostic tooling compiled as a kernel module due
the missing EXPORT_SYMBOL_GPL for the function.  Export
save_stack_trace_regs() to align with other architectures such as
s390, openrisc, and powerpc. This is similar to the ARM64 export of
save_stack_trace_tsk() added in git commit e27c7fa015d6.

Signed-off-by: William Cohen <wcohen@...hat.com>
---
 arch/arm64/kernel/stacktrace.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
index 1a29f2695ff2..d908b5e9e949 100644
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -143,6 +143,7 @@ void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
 	if (trace->nr_entries < trace->max_entries)
 		trace->entries[trace->nr_entries++] = ULONG_MAX;
 }
+EXPORT_SYMBOL_GPL(save_stack_trace_regs);
 
 static noinline void __save_stack_trace(struct task_struct *tsk,
 	struct stack_trace *trace, unsigned int nosched)
-- 
2.20.1