On s390 systems (aka mainframes), it has classic channel devices for networking and permanent storage that are currently even more common than PCI devices. Hence it could have a fully functional s390 kernel with CONFIG_PCI=n, then the relevant iomem mapping functions [including ioremap(), devm_ioremap(), etc.] are not available. Here let COMMON_CLK_FIXED_MMIO depend on HAS_IOMEM so that it won't be built to cause below compiling error if PCI is unset: ------ ld: drivers/clk/clk-fixed-mmio.o: in function `fixed_mmio_clk_setup': clk-fixed-mmio.c:(.text+0x5e): undefined reference to `of_iomap' ld: clk-fixed-mmio.c:(.text+0xba): undefined reference to `iounmap' ------ Reported-by: kernel test robot <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@xxxxxxxxx/ Signed-off-by: Baoquan He <bhe@xxxxxxxxxx> Cc: Michael Turquette <mturquette@xxxxxxxxxxxx> Cc: Stephen Boyd <sboyd@xxxxxxxxxx> Cc: linux-clk@xxxxxxxxxxxxxxx --- drivers/clk/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 93f38a8178ba..6b3b424addab 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -444,6 +444,7 @@ config COMMON_CLK_BD718XX config COMMON_CLK_FIXED_MMIO bool "Clock driver for Memory Mapped Fixed values" depends on COMMON_CLK && OF + depends on HAS_IOMEM help Support for Memory Mapped IO Fixed clocks -- 2.34.1
