ACPI: Introduce acpi_os_get_iomem()
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>hifive-unleashed-5.1
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@ -285,6 +285,22 @@ acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
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return NULL;
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return NULL;
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}
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}
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void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
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{
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struct acpi_ioremap *map;
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void __iomem *virt = NULL;
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mutex_lock(&acpi_ioremap_lock);
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map = acpi_map_lookup(phys, size);
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if (map) {
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virt = map->virt + (phys - map->phys);
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map->refcount++;
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}
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mutex_unlock(&acpi_ioremap_lock);
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return virt;
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}
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EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static struct acpi_ioremap *
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static struct acpi_ioremap *
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acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
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acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
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@ -10,4 +10,6 @@ static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
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return ioremap_cache(phys, size);
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return ioremap_cache(phys, size);
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}
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}
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void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size);
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#endif
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#endif
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