[PATCH] PCI: Annotate pci_cache_line_size variables as __ro_after_init

[Heiner Kallweit <hkallweit1@gmail.com>]

Annotate both variables as __ro_after_init, enforcing that they can't
be changed after the init phase.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 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