This patch improves the device tree directory sorting. Previously the sorting algorithm would result in the following ordering for a Freescale P2020 SoC device (Rooted under: /proc/device-tree/soc at ffe00000) #address-cells #size-cells . .. bus-frequency compatible device_type i2c at 3000 i2c at 3100 mdio at 24520 msi at 41600 mdio at 26520 serial at 4600 ethernet at 26000 global-utilities at e0000 memory-controller at 2000 l2-cache-controller at 20000 name pic at 40000 ranges sdhci at 2e000 serial at 4500 Ideally 'serial at 4500' would come before 'serial at 4600'. This would cause the new kexec-ed kernel to have the serial consoles detected in the wrong order, i.e. ttyS0 and ttyS1 are swapped. Using the attached patch the same directory is ordered as: #address-cells #size-cells . .. bus-frequency compatible device_type ethernet at 26000 global-utilities at e0000 i2c at 3000 i2c at 3100 l2-cache-controller at 20000 mdio at 24520 mdio at 26520 memory-controller at 2000 msi at 41600 name pic at 40000 ranges sdhci at 2e000 serial at 4500 serial at 4600 Curt Brune (1): Improve device tree directory sorting kexec/arch/ppc/fs2dt.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) -- 1.9.1
