ARM/dma-mapping: const a pointer to bus_type in arm_iommu_create_mapping()
Change the function arm_iommu_create_mapping() to take a pointer to a const bus_type as the function does not modify the variable the pointer points to at all, and the driver core bus functions it calls all expect a const * type. Cc: Russell King <linux@armlinux.org.uk> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Kees Cook <keescook@chromium.org> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230313182918.1312597-33-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -24,7 +24,7 @@ struct dma_iommu_mapping {
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};
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};
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struct dma_iommu_mapping *
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struct dma_iommu_mapping *
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arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size);
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arm_iommu_create_mapping(const struct bus_type *bus, dma_addr_t base, u64 size);
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void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
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void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
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@ -1543,7 +1543,7 @@ static const struct dma_map_ops iommu_ops = {
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* arm_iommu_attach_device function.
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* arm_iommu_attach_device function.
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*/
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*/
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struct dma_iommu_mapping *
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struct dma_iommu_mapping *
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arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size)
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arm_iommu_create_mapping(const struct bus_type *bus, dma_addr_t base, u64 size)
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{
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{
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unsigned int bits = size >> PAGE_SHIFT;
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unsigned int bits = size >> PAGE_SHIFT;
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unsigned int bitmap_size = BITS_TO_LONGS(bits) * sizeof(long);
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unsigned int bitmap_size = BITS_TO_LONGS(bits) * sizeof(long);
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