[RFC PATCH v2 07/13] stacktrace: export stack_trace_save_regs()

The other stack_trace_save_*() flavours are exported, but the regs
variant is not, so no module can capture a stack trace for a given
pt_regs. KWatch, which may be built as a module, uses it to record
who wrote to a watched address from the hardware breakpoint handler.
Export it like its siblings.

Signed-off-by: Jinchao Wang <[email protected]>
---
 kernel/stacktrace.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c
index afb3c116da91..d853c40f916b 100644
--- a/kernel/stacktrace.c
+++ b/kernel/stacktrace.c
@@ -175,6 +175,7 @@ unsigned int stack_trace_save_regs(struct pt_regs *regs, unsigned long *store,
 	arch_stack_walk(consume_entry, &c, current, regs);
 	return c.len;
 }
+EXPORT_SYMBOL_GPL(stack_trace_save_regs);
 
 #ifdef CONFIG_HAVE_RELIABLE_STACKTRACE
 /**
@@ -325,6 +326,7 @@ unsigned int stack_trace_save_regs(struct pt_regs *regs, unsigned long *store,
 	save_stack_trace_regs(regs, &trace);
 	return trace.nr_entries;
 }
+EXPORT_SYMBOL_GPL(stack_trace_save_regs);
 
 #ifdef CONFIG_HAVE_RELIABLE_STACKTRACE
 /**
-- 
2.53.0