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From: Arnd Bergmann <arnd@kernel.org>
To: "Sebastian Reichel" <sre@kernel.org>,
	"Nicolas Ferre" <nicolas.ferre@microchip.com>,
	"Alexandre Belloni" <alexandre.belloni@bootlin.com>,
	"Claudiu Beznea" <claudiu.beznea@tuxon.dev>,
	"Nathan Chancellor" <nathan@kernel.org>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	Yangtao Li <frank.li@vivo.com>,
	linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: [PATCH] power: reset: at91: mark at91_wakeup_status non-__init
Date: Tue, 12 Dec 2023 22:46:49 +0100	[thread overview]
Message-ID: <20231212214658.213510-1-arnd@kernel.org> (raw)

From: Arnd Bergmann <arnd@arndb.de>

Two copies of the at91_wakeup_status() function are called by the
respective probe() callbacks and are marked __init, but the probe
functions are no longer annotated that way. This works with gcc because
the functions always get inlined, but clang keeps them separate, which
can lead to executing freed memory:

WARNING: modpost: vmlinux: section mismatch in reference: at91_poweroff_probe+0x80 (section: .text) -> at91_wakeup_status (section: .init.text)
WARNING: modpost: vmlinux: section mismatch in reference: at91_shdwc_probe+0xcc (section: .text) -> at91_wakeup_status (section: .init.text)

Drop the incorrect annotation on these.

Fixes: 099806de68b7 ("power: reset: at91-poweroff: Stop using module_platform_driver_probe()")
Fixes: dde74a5de817 ("power: reset: at91-sama5d2_shdwc: Stop using module_platform_driver_probe()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/power/reset/at91-poweroff.c      | 2 +-
 drivers/power/reset/at91-sama5d2_shdwc.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/power/reset/at91-poweroff.c b/drivers/power/reset/at91-poweroff.c
index 126e774e210c..93eece027865 100644
--- a/drivers/power/reset/at91-poweroff.c
+++ b/drivers/power/reset/at91-poweroff.c
@@ -57,7 +57,7 @@ static struct shdwc {
 	void __iomem *mpddrc_base;
 } at91_shdwc;
 
-static void __init at91_wakeup_status(struct platform_device *pdev)
+static void at91_wakeup_status(struct platform_device *pdev)
 {
 	const char *reason;
 	u32 reg = readl(at91_shdwc.shdwc_base + AT91_SHDW_SR);
diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c
index af95c7b39cb3..959ce0dbe91d 100644
--- a/drivers/power/reset/at91-sama5d2_shdwc.c
+++ b/drivers/power/reset/at91-sama5d2_shdwc.c
@@ -107,7 +107,7 @@ static const unsigned long long sdwc_dbc_period[] = {
 	0, 3, 32, 512, 4096, 32768,
 };
 
-static void __init at91_wakeup_status(struct platform_device *pdev)
+static void at91_wakeup_status(struct platform_device *pdev)
 {
 	struct shdwc *shdw = platform_get_drvdata(pdev);
 	const struct reg_config *rcfg = shdw->rcfg;
-- 
2.39.2


WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@kernel.org>
To: "Sebastian Reichel" <sre@kernel.org>,
	"Nicolas Ferre" <nicolas.ferre@microchip.com>,
	"Alexandre Belloni" <alexandre.belloni@bootlin.com>,
	"Claudiu Beznea" <claudiu.beznea@tuxon.dev>,
	"Nathan Chancellor" <nathan@kernel.org>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	Yangtao Li <frank.li@vivo.com>,
	linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: [PATCH] power: reset: at91: mark at91_wakeup_status non-__init
Date: Tue, 12 Dec 2023 22:46:49 +0100	[thread overview]
Message-ID: <20231212214658.213510-1-arnd@kernel.org> (raw)

From: Arnd Bergmann <arnd@arndb.de>

Two copies of the at91_wakeup_status() function are called by the
respective probe() callbacks and are marked __init, but the probe
functions are no longer annotated that way. This works with gcc because
the functions always get inlined, but clang keeps them separate, which
can lead to executing freed memory:

WARNING: modpost: vmlinux: section mismatch in reference: at91_poweroff_probe+0x80 (section: .text) -> at91_wakeup_status (section: .init.text)
WARNING: modpost: vmlinux: section mismatch in reference: at91_shdwc_probe+0xcc (section: .text) -> at91_wakeup_status (section: .init.text)

Drop the incorrect annotation on these.

Fixes: 099806de68b7 ("power: reset: at91-poweroff: Stop using module_platform_driver_probe()")
Fixes: dde74a5de817 ("power: reset: at91-sama5d2_shdwc: Stop using module_platform_driver_probe()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/power/reset/at91-poweroff.c      | 2 +-
 drivers/power/reset/at91-sama5d2_shdwc.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/power/reset/at91-poweroff.c b/drivers/power/reset/at91-poweroff.c
index 126e774e210c..93eece027865 100644
--- a/drivers/power/reset/at91-poweroff.c
+++ b/drivers/power/reset/at91-poweroff.c
@@ -57,7 +57,7 @@ static struct shdwc {
 	void __iomem *mpddrc_base;
 } at91_shdwc;
 
-static void __init at91_wakeup_status(struct platform_device *pdev)
+static void at91_wakeup_status(struct platform_device *pdev)
 {
 	const char *reason;
 	u32 reg = readl(at91_shdwc.shdwc_base + AT91_SHDW_SR);
diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c
index af95c7b39cb3..959ce0dbe91d 100644
--- a/drivers/power/reset/at91-sama5d2_shdwc.c
+++ b/drivers/power/reset/at91-sama5d2_shdwc.c
@@ -107,7 +107,7 @@ static const unsigned long long sdwc_dbc_period[] = {
 	0, 3, 32, 512, 4096, 32768,
 };
 
-static void __init at91_wakeup_status(struct platform_device *pdev)
+static void at91_wakeup_status(struct platform_device *pdev)
 {
 	struct shdwc *shdw = platform_get_drvdata(pdev);
 	const struct reg_config *rcfg = shdw->rcfg;
-- 
2.39.2


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             reply	other threads:[~2023-12-12 21:47 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-12 21:46 Arnd Bergmann [this message]
2023-12-12 21:46 ` [PATCH] power: reset: at91: mark at91_wakeup_status non-__init Arnd Bergmann
2023-12-12 21:50 ` Nathan Chancellor
2023-12-12 21:50   ` Nathan Chancellor
2023-12-13  7:25   ` Uwe Kleine-König
2023-12-13  7:25     ` Uwe Kleine-König
2023-12-13 13:01     ` Nicolas Ferre
2023-12-13 13:01       ` Nicolas Ferre

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