diff options
| -rw-r--r-- | drivers/acpi/osl.c | 16 | ||||
| -rw-r--r-- | include/linux/acpi_io.h | 2 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 5389f9f2e2ff..52ca8721bc9c 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -285,6 +285,22 @@ acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) return NULL; } +void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) +{ + struct acpi_ioremap *map; + void __iomem *virt = NULL; + + mutex_lock(&acpi_ioremap_lock); + map = acpi_map_lookup(phys, size); + if (map) { + virt = map->virt + (phys - map->phys); + map->refcount++; + } + mutex_unlock(&acpi_ioremap_lock); + return virt; +} +EXPORT_SYMBOL_GPL(acpi_os_get_iomem); + /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ static struct acpi_ioremap * acpi_map_lookup_virt(void __iomem *virt, acpi_size size) diff --git a/include/linux/acpi_io.h b/include/linux/acpi_io.h index 28a3ae279d7a..4afd7102459d 100644 --- a/include/linux/acpi_io.h +++ b/include/linux/acpi_io.h @@ -10,4 +10,6 @@ static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, return ioremap_cache(phys, size); } +void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size); + #endif |