[PATCH v1 1/7] ACPI: sysfs: Make sparse happy about address space in use

From: Andy Shevchenko
Date: Wed Jun 16 2021 - 13:03:40 EST

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@xxxxxxxxxxxxxxx>
drivers/acpi/sysfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 88629d26bd48..767aa65e4bdd 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -419,7 +419,7 @@ static ssize_t acpi_data_show(struct file *filp, struct kobject *kobj,
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);