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dma-debug: make dma_debug_add_bus take a const pointer

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The driver core now can handle a const struct bus_type pointer, and the
dma_debug_add_bus() call just passes on the pointer give to it to the
driver core, so make this pointer const as well to allow everyone to use
read-only struct bus_type pointers going forward.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc:  <iommu@lists.linux.dev>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/2023121941-dejected-nugget-681e@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-12-19 14:41:42 +01:00
parent e76933a9bf
commit 86438841e4
2 changed files with 3 additions and 3 deletions
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4
include/linux/dma-map-ops.h
View File

@ -443,10 +443,10 @@ static inline void arch_teardown_dma_ops(struct device *dev)
#endif /* CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS */
#ifdef CONFIG_DMA_API_DEBUG
void dma_debug_add_bus(struct bus_type *bus);
void dma_debug_add_bus(const struct bus_type *bus);
void debug_dma_dump_mappings(struct device *dev);
#else
static inline void dma_debug_add_bus(struct bus_type *bus)
static inline void dma_debug_add_bus(const struct bus_type *bus)
{
}
static inline void debug_dma_dump_mappings(struct device *dev)

2
kernel/dma/debug.c
View File

@ -876,7 +876,7 @@ static int dma_debug_device_change(struct notifier_block *nb, unsigned long acti
return 0;
}
void dma_debug_add_bus(struct bus_type *bus)
void dma_debug_add_bus(const struct bus_type *bus)
{
struct notifier_block *nb;