linux-kernel - [PATCH 5.15 020/172] thermal: int340x: Limit Kconfig to 64-bit

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Message-Id: <20220214092507.089918741@linuxfoundation.org>
Date:   Mon, 14 Feb 2022 10:24:38 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Sumeet Pawnikar <sumeet.r.pawnikar@...el.com>
Subject: [PATCH 5.15 020/172] thermal: int340x: Limit Kconfig to 64-bit

From: Arnd Bergmann <arnd@...db.de>

commit 994a04a20b03128838ec0250a0e266aab24d23f1 upstream.

32-bit processors cannot generally access 64-bit MMIO registers
atomically, and it is unknown in which order the two halves of
this registers would need to be read:

drivers/thermal/intel/int340x_thermal/processor_thermal_mbox.c: In function 'send_mbox_cmd':
drivers/thermal/intel/int340x_thermal/processor_thermal_mbox.c:79:37: error: implicit declaration of function 'readq'; did you mean 'readl'? [-Werror=implicit-function-declaration]
   79 |                         *cmd_resp = readq((void __iomem *) (proc_priv->mmio_base + MBOX_OFFSET_DATA));
      |                                     ^~~~~
      |                                     readl

The driver already does not build for anything other than x86,
so limit it further to x86-64.

Fixes: aeb58c860dc5 ("thermal/drivers/int340x: processor_thermal: Suppot 64 bit RFIM responses")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Reviewed-by: Randy Dunlap <rdunlap@...radead.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/thermal/intel/int340x_thermal/Kconfig |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/thermal/intel/int340x_thermal/Kconfig
+++ b/drivers/thermal/intel/int340x_thermal/Kconfig
@@ -5,12 +5,12 @@
 
 config INT340X_THERMAL
 	tristate "ACPI INT340X thermal drivers"
-	depends on X86 && ACPI && PCI
+	depends on X86_64 && ACPI && PCI
 	select THERMAL_GOV_USER_SPACE
 	select ACPI_THERMAL_REL
 	select ACPI_FAN
 	select INTEL_SOC_DTS_IOSF_CORE
-	select PROC_THERMAL_MMIO_RAPL if X86_64 && POWERCAP
+	select PROC_THERMAL_MMIO_RAPL if POWERCAP
 	help
 	  Newer laptops and tablets that use ACPI may have thermal sensors and
 	  other devices with thermal control capabilities outside the core