Messages in this thread Patch in this message | | | From | "Rafael J. Wysocki" <> | Subject | [PATCH 9/11] ACPI: Introduce acpi_os_get_iomem() | Date | Thu, 20 Jan 2011 12:35:46 +0100 |
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From: Rafael J. Wysocki <rjw@sisk.pl>
Introduce function acpi_os_get_iomem() that may be used by its callers to get a reference to an ACPI iomap.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> --- drivers/acpi/osl.c | 16 ++++++++++++++++ include/linux/acpi_io.h | 2 ++ 2 files changed, 18 insertions(+)
Index: linux-2.6/drivers/acpi/osl.c =================================================================== --- linux-2.6.orig/drivers/acpi/osl.c +++ linux-2.6/drivers/acpi/osl.c @@ -285,6 +285,22 @@ acpi_map_vaddr_lookup(acpi_physical_addr 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) Index: linux-2.6/include/linux/acpi_io.h =================================================================== --- linux-2.6.orig/include/linux/acpi_io.h +++ linux-2.6/include/linux/acpi_io.h @@ -10,4 +10,6 @@ static inline void __iomem *acpi_os_iore return ioremap_cache(phys, size); } +void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size); + #endif
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