linux-kernel - [PATCH 4.14 05/23] ACPI: sysfs: Make sparse happy about address space in use

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Date:   Fri,  3 Jun 2022 19:39:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        dann frazier <dann.frazier@...onical.com>
Subject: [PATCH 4.14 05/23] ACPI: sysfs: Make sparse happy about address space in use

From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

commit bdd56d7d8931e842775d2e5b93d426a8d1940e33 upstream.

Sparse is not happy about address space in use in acpi_data_show():

drivers/acpi/sysfs.c:428:14: warning: incorrect type in assignment (different address spaces)
drivers/acpi/sysfs.c:428:14:    expected void [noderef] __iomem *base
drivers/acpi/sysfs.c:428:14:    got void *
drivers/acpi/sysfs.c:431:59: warning: incorrect type in argument 4 (different address spaces)
drivers/acpi/sysfs.c:431:59:    expected void const *from
drivers/acpi/sysfs.c:431:59:    got void [noderef] __iomem *base
drivers/acpi/sysfs.c:433:30: warning: incorrect type in argument 1 (different address spaces)
drivers/acpi/sysfs.c:433:30:    expected void *logical_address
drivers/acpi/sysfs.c:433:30:    got void [noderef] __iomem *base

Indeed, acpi_os_map_memory() returns a void pointer with dropped specific
address space. Hence, we don't need to carry out __iomem in acpi_data_show().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Cc: dann frazier <dann.frazier@...onical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/acpi/sysfs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -435,7 +435,7 @@ static ssize_t acpi_data_show(struct fil
 			      loff_t offset, size_t count)
 {
 	struct acpi_data_attr *data_attr;
-	void __iomem *base;
+	void *base;
 	ssize_t rc;
 
 	data_attr = container_of(bin_attr, struct acpi_data_attr, attr);