Annotate both variables as __ro_after_init, enforcing that they can't be changed after the init phase. Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx> --- drivers/pci/pci.c | 4 ++-- include/linux/pci.h | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 5f8edba78..e7ac4474b 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -142,8 +142,8 @@ enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_DEFAULT; * the dfl or actual value as it sees fit. Don't forget this is * measured in 32-bit words, not bytes. */ -u8 pci_dfl_cache_line_size = L1_CACHE_BYTES >> 2; -u8 pci_cache_line_size; +u8 pci_dfl_cache_line_size __ro_after_init = L1_CACHE_BYTES >> 2; +u8 pci_cache_line_size __ro_after_init; /* * If we set up a device for bus mastering, we need to check the latency diff --git a/include/linux/pci.h b/include/linux/pci.h index 69b10f2fb..cf63be0c9 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2334,8 +2334,8 @@ extern int pci_pci_problems; extern unsigned long pci_cardbus_io_size; extern unsigned long pci_cardbus_mem_size; -extern u8 pci_dfl_cache_line_size; -extern u8 pci_cache_line_size; +extern u8 pci_dfl_cache_line_size __ro_after_init; +extern u8 pci_cache_line_size __ro_after_init; /* Architecture-specific versions may override these (weak) */ void pcibios_disable_device(struct pci_dev *dev); -- 2.44.0
