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spi: make spi_bus_type const

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Now that the driver core can properly handle constant struct bus_type,
move the spi_bus_type variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Cc: Mark Brown <broonie@kernel.org>
Cc:  <linux-spi@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://msgid.link/r/2024010549-erasure-swoop-1cc6@gregkh
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Greg Kroah-Hartman 2024-01-05 11:32:50 +01:00 committed by Mark Brown
parent 4247d7f2ca
commit 6df534cc71
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2 changed files with 2 additions and 2 deletions
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2
drivers/spi/spi.c
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@ -459,7 +459,7 @@ static void spi_shutdown(struct device *dev)
}
}
struct bus_type spi_bus_type = {
const struct bus_type spi_bus_type = {
.name = "spi",
.dev_groups = spi_dev_groups,
.match = spi_match_device,

2
include/linux/spi/spi.h
View file

@ -36,7 +36,7 @@ struct spi_message;
* INTERFACES between SPI master-side drivers and SPI slave protocol handlers,
* and SPI infrastructure.
*/
extern struct bus_type spi_bus_type;
extern const struct bus_type spi_bus_type;
/**
* struct spi_statistics - statistics for spi transfers