On 2018/12/18 10:56, Sinan Kaya wrote: > Remove PCI dependent code out of iort.c when CONFIG_PCI is not defined. > A quick search reveals the following functions: > 1. pci_request_acs() > 2. pci_domain_nr() > 3. pci_is_root_bus() > 4. to_pci_dev() > > Both pci_domain_nr() and pci_is_root_bus() are defined in linux/pci.h. > pci_domain_nr() is a stub function when CONFIG_PCI is not set and > pci_is_root_bus() just returns a reference to a structure member which > is still valid without CONFIG_PCI set. > > to_pci_dev() is a macro that expands to container_of. > > pci_request_acs() is the only code that gets pulled in from drivers/pci/*.c Actually we have pci_for_each_dma_alias() too which is from drivers/pci/search.c without stub function in linux/pci.h, but I didn't get the compile error at link time, I think the compiler just do some optimization to remove the dead code because dev_is_pci() is obvious false. Thanks Hanjun
