Why? Because:
A) It's not modified and so it can be made const. const is good.
B) If one has a function that was given a const pci_bus pointer and you
want to get a pointer to its pci_controller, you'll get a warning from gcc
when you use pci_bus_to_host(). This is the right way to stop that
warning.
Signed-off-by: Trent Piepho <[EMAIL PROTECTED]>
---
include/asm-powerpc/pci-bridge.h | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h
index e5802c6..b95d033 100644
--- a/include/asm-powerpc/pci-bridge.h
+++ b/include/asm-powerpc/pci-bridge.h
@@ -117,7 +117,7 @@ struct pci_controller {
#ifndef CONFIG_PPC64
-static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
+static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
{
return bus->sysdata;
}
@@ -235,7 +235,7 @@ extern void pcibios_fixup_new_pci_devices(struct pci_bus
*bus);
extern int pcibios_remove_root_bus(struct pci_controller *phb);
-static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
+static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
{
struct device_node *busdn = bus->sysdata;
--
1.5.4.1
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