arm64: stacktrace: make struct stackframe private to stacktrace.c

Now that arm64 uses arch_stack_walk() consistently, struct stackframe is
only used within stacktrace.c. To make it easier to read and maintain
this code, it would be nicer if the definition were there too.

Move the definition into stacktrace.c.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Madhavan T. Venkataraman <madvenka@linux.microsoft.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Madhavan T. Venkataraman <madvenka@linux.microsoft.com>
Reviwed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kalesh Singh <kaleshsingh@google.com> for the series.
Link: https://lore.kernel.org/r/20220413145910.3060139-4-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/include/asm/stacktrace.h b/arch/arm64/include/asm/stacktrace.h
index e77cdef9ca29bba1ca37954c6880d2a48354d9cf..aec9315bf15639a7d33c487adbdeb3e3768f8bf2 100644 (file)
--- a/arch/arm64/include/asm/stacktrace.h
+++ b/arch/arm64/include/asm/stacktrace.h
@@ -31,38 +31,6 @@ struct stack_info {
        enum stack_type type;
 };
 
-/*
- * A snapshot of a frame record or fp/lr register values, along with some
- * accounting information necessary for robust unwinding.
- *
- * @fp:          The fp value in the frame record (or the real fp)
- * @pc:          The lr value in the frame record (or the real lr)
- *
- * @stacks_done: Stacks which have been entirely unwound, for which it is no
- *               longer valid to unwind to.
- *
- * @prev_fp:     The fp that pointed to this frame record, or a synthetic value
- *               of 0. This is used to ensure that within a stack, each
- *               subsequent frame record is at an increasing address.
- * @prev_type:   The type of stack this frame record was on, or a synthetic
- *               value of STACK_TYPE_UNKNOWN. This is used to detect a
- *               transition from one stack to another.
- *
- * @kr_cur:      When KRETPROBES is selected, holds the kretprobe instance
- *               associated with the most recently encountered replacement lr
- *               value.
- */
-struct stackframe {
-       unsigned long fp;
-       unsigned long pc;
-       DECLARE_BITMAP(stacks_done, __NR_STACK_TYPES);
-       unsigned long prev_fp;
-       enum stack_type prev_type;
-#ifdef CONFIG_KRETPROBES
-       struct llist_node *kr_cur;
-#endif
-};
-
 extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
                           const char *loglvl);
 

diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
index 08af9ca9a84517b8029e88fe5ed57ffb1161ed94..073d0941a5b681611c24096da3c9453e41da1df4 100644 (file)
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -18,6 +18,38 @@
 #include <asm/stack_pointer.h>
 #include <asm/stacktrace.h>
 
+/*
+ * A snapshot of a frame record or fp/lr register values, along with some
+ * accounting information necessary for robust unwinding.
+ *
+ * @fp:          The fp value in the frame record (or the real fp)
+ * @pc:          The lr value in the frame record (or the real lr)
+ *
+ * @stacks_done: Stacks which have been entirely unwound, for which it is no
+ *               longer valid to unwind to.
+ *
+ * @prev_fp:     The fp that pointed to this frame record, or a synthetic value
+ *               of 0. This is used to ensure that within a stack, each
+ *               subsequent frame record is at an increasing address.
+ * @prev_type:   The type of stack this frame record was on, or a synthetic
+ *               value of STACK_TYPE_UNKNOWN. This is used to detect a
+ *               transition from one stack to another.
+ *
+ * @kr_cur:      When KRETPROBES is selected, holds the kretprobe instance
+ *               associated with the most recently encountered replacement lr
+ *               value.
+ */
+struct stackframe {
+       unsigned long fp;
+       unsigned long pc;
+       DECLARE_BITMAP(stacks_done, __NR_STACK_TYPES);
+       unsigned long prev_fp;
+       enum stack_type prev_type;
+#ifdef CONFIG_KRETPROBES
+       struct llist_node *kr_cur;
+#endif
+};
+
 static notrace void start_backtrace(struct stackframe *frame, unsigned long fp,
                                    unsigned long pc)
 {