1# Guidelines for Using Patches on OpenHarmony Development Boards<a name="EN-US_TOPIC_0000001081980461"></a> 2 3The patch files are stored in the **kernel/linux/patches/linux-4.19** source code path of the project. You can obtain the driver patch of a specific chip architecture from this directory. 4 5To use the patch of a specific chip platform driver, you need to merge the required kernel patch into the kernel code. 6 7Merge the corresponding patches for different chip platforms. 8 9The following uses Hi3516D V300 as an example: 10 11``` 12patch -p1 < device/hisilicon/hi3516dv300/sdk_linux/open_source/linux/hisi_linux-4.19_hos_l2.patch 13``` 14 15> **NOTICE:** 16>Because patches are applied after the code environment of **kernel/linux-4.19** is copied during compilation and building of the OpenHarmony project, you must retain the original code environment of **kernel/linux-4.19** before running the OpenHarmony version-level build command. 17 18
