Linux v5.6 will enable modular Arm SMMU drivers. Since the SMMU manages DMA accesses from peripherals, on some systems the disk and network devices won't start until the SMMU module is loaded. For example without this change, when building the SMMU as a module, the PCIe SATA controller doesn't start and the root file system is unavailable on my test server. Add modules from kernel/drivers/iommu/ when MODULES=most, and iterate over /sys/class/iommu/ when MODULES=deps.
Signed-off-by: Jean-Philippe Brucker <[email protected]> diff --git a/hook-functions b/hook-functions index fa1fe59..09076d8 100644 --- a/hook-functions +++ b/hook-functions @@ -449,7 +449,7 @@ dep_add_modules() fi # sys walk some important device classes - for class in backlight extcon gpio phy pwm regulator rtc; do + for class in backlight extcon gpio iommu phy pwm regulator rtc; do for device in "/sys/class/$class"/*; do device="$(readlink -f "$device")" \ && sys_walk_mod_add "$device" @@ -595,6 +595,7 @@ auto_add_modules() copy_modules_dir kernel/drivers/gpio copy_modules_dir kernel/drivers/i2c/busses copy_modules_dir kernel/drivers/i2c/muxes + copy_modules_dir kernel/drivers/iommu copy_modules_dir kernel/drivers/mfd copy_modules_dir kernel/drivers/phy copy_modules_dir kernel/drivers/pinctrl -- 2.20.1
