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authorDave Martin <Dave.Martin@arm.com>2019-07-02 14:07:28 +0100
committerWill Deacon <will@kernel.org>2019-07-22 11:44:08 +0100
commitf3dcbe67ed424f1cf92065f9ad0cc647f2b44eac (patch)
tree6838d2a529abca0a3286e442e4b316605fc84f03 /arch/arm64/include/asm
parent8caa6e2be72313c170f2b30e8475323526dd7ed1 (diff)
downloadlinux-f3dcbe67ed424f1cf92065f9ad0cc647f2b44eac.tar.gz
arm64: stacktrace: Factor out backtrace initialisation
Some common code is required by each stacktrace user to initialise struct stackframe before the first call to unwind_frame(). In preparation for adding to the common code, this patch factors it out into a separate function start_backtrace(), and modifies the stacktrace callers appropriately. No functional change. Signed-off-by: Dave Martin <dave.martin@arm.com> [Mark: drop tsk argument, update more callsites] Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: James Morse <james.morse@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm')
-rw-r--r--arch/arm64/include/asm/stacktrace.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/stacktrace.h b/arch/arm64/include/asm/stacktrace.h
index 1e0c5a7cdce5..7fa0dfedb8e9 100644
--- a/arch/arm64/include/asm/stacktrace.h
+++ b/arch/arm64/include/asm/stacktrace.h
@@ -131,4 +131,14 @@ static inline bool on_accessible_stack(const struct task_struct *tsk,
return false;
}
+static inline void start_backtrace(struct stackframe *frame,
+ unsigned long fp, unsigned long pc)
+{
+ frame->fp = fp;
+ frame->pc = pc;
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ frame->graph = 0;
+#endif
+}
+
#endif /* __ASM_STACKTRACE_H */