linux-kernel - [PATCH RFC 6/8] s390: stacktrace: Make callbacks use new prototype with frame info

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Date:   Mon, 18 Apr 2022 21:22:15 +0800
From:   He Zhe <zhe.he@...driver.com>
To:     catalin.marinas@....com, will@...nel.org, mark.rutland@....com,
        tglx@...utronix.de, bp@...en8.de, dave.hansen@...ux.intel.com,
        keescook@...omium.org, alexander.shishkin@...ux.intel.com,
        jolsa@...nel.org, namhyung@...nel.org, benh@...nel.crashing.org,
        paulus@...ba.org, borntraeger@...ux.ibm.com, svens@...ux.ibm.com,
        hpa@...or.com
Cc:     x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-s390@...r.kernel.org, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, zhe.he@...driver.com
Subject: [PATCH RFC 6/8] s390: stacktrace: Make callbacks use new prototype with frame info

stack_trace_consume_fn has been changed to
bool (*stack_trace_consume_fn)(void *cookie, struct frame_info *fi);
to be able to pass more information.

Turn to use pc in struct frame_info in arch_stack_walk callbacks without
functinoal change.

Signed-off-by: He Zhe <zhe.he@...driver.com>
---
 arch/s390/kernel/stacktrace.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c
index 7ee455e8e3d5..66aa7da0d974 100644
--- a/arch/s390/kernel/stacktrace.c
+++ b/arch/s390/kernel/stacktrace.c
@@ -14,11 +14,11 @@ void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
 		     struct task_struct *task, struct pt_regs *regs)
 {
 	struct unwind_state state;
-	unsigned long addr;
+	struct frame_info fi;
 
 	unwind_for_each_frame(&state, task, regs, 0) {
-		addr = unwind_get_return_address(&state);
-		if (!addr || !consume_entry(cookie, addr))
+		fi.pc = unwind_get_return_address(&state);
+		if (!fi.pc || !consume_entry(cookie, &fi))
 			break;
 	}
 }
@@ -27,7 +27,7 @@ int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry,
 			     void *cookie, struct task_struct *task)
 {
 	struct unwind_state state;
-	unsigned long addr;
+	struct frame_info fi;
 
 	unwind_for_each_frame(&state, task, NULL, 0) {
 		if (state.stack_info.type != STACK_TYPE_TASK)
@@ -36,8 +36,8 @@ int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry,
 		if (state.regs)
 			return -EINVAL;
 
-		addr = unwind_get_return_address(&state);
-		if (!addr)
+		fi.pc = unwind_get_return_address(&state);
+		if (!fi.pc)
 			return -EINVAL;
 
 #ifdef CONFIG_KPROBES
@@ -49,7 +49,7 @@ int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry,
 			return -EINVAL;
 #endif
 
-		if (!consume_entry(cookie, addr))
+		if (!consume_entry(cookie, &fi))
 			return -EINVAL;
 	}
 
-- 
2.25.1