linux-kernel - [PATCH 1/2] ARM: 9258/1: Fix callchain

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Date: Tue, 18 Jun 2024 11:26:19 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <linux@...linux.org.uk>, <will@...nel.org>, <mark.rutland@....com>,
	<peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
	<namhyung@...nel.org>, <alexander.shishkin@...ux.intel.com>,
	<jolsa@...nel.org>, <irogers@...gle.com>, <adrian.hunter@...el.com>,
	<kan.liang@...ux.intel.com>, <arnd@...db.de>, <afd@...com>,
	<akpm@...ux-foundation.org>, <rmk+kernel@...linux.org.uk>,
	<linus.walleij@...aro.org>, <eric.devolder@...cle.com>, <robh@...nel.org>,
	<ardb@...nel.org>, <broonie@...nel.org>, <lihuafei1@...wei.com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<linux-perf-users@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH 1/2] ARM: 9258/1: Fix callchain_trace() return value

perf_callchain_store() return 0 on success, -1 otherwise, fix
callchain_trace() to return correct bool value. So walk_stackframe() can
have a chance to stop walking the stack ahead.

Fixes: 70ccc7c0667b ("ARM: 9258/1: stacktrace: Make stack walk callback consistent with generic code")
Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 arch/arm/kernel/perf_callchain.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/kernel/perf_callchain.c b/arch/arm/kernel/perf_callchain.c
index 7147edbe56c6..1d230ac9d0eb 100644
--- a/arch/arm/kernel/perf_callchain.c
+++ b/arch/arm/kernel/perf_callchain.c
@@ -85,8 +85,7 @@ static bool
 callchain_trace(void *data, unsigned long pc)
 {
 	struct perf_callchain_entry_ctx *entry = data;
-	perf_callchain_store(entry, pc);
-	return true;
+	return perf_callchain_store(entry, pc) == 0;
 }
 
 void
-- 
2.34.1