[PATCH 1/3] ACPI: OSL: Use deferred unmapping in acpi_os_unmap_generic_address()

From: Rafael J. Wysocki
Date: Thu Jul 02 2020 - 08:17:54 EST


From: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx>

There is no reason (knwon to me) why any of the existing users of
acpi_os_unmap_generic_address() would need to wait for the unused
memory mappings left by it to actually go away, so use the deferred
unmapping of ACPI memory introduced previously in that function.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/acpi/osl.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index abbf8630f774..5c56f084e8b0 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -518,12 +518,9 @@ void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
mutex_unlock(&acpi_ioremap_lock);
return;
}
- if (acpi_os_drop_map_ref(map, false))
- map = NULL;
+ acpi_os_drop_map_ref(map, true);

mutex_unlock(&acpi_ioremap_lock);
-
- acpi_os_map_cleanup(map);
}
EXPORT_SYMBOL(acpi_os_unmap_generic_address);

--
2.26.2