On 9/2/20 8:17 AM, Johnny Hughes wrote: > You CAN do a diff on the exploded tarball from the SRPM and either the > last kernel released (to see what is in this update) .. or the > kernel.org reference kernel .. to see what is different from the > kernel.org release. You can, but expanding two kernels and diffing them consumes a lot of disk space and time. To determine if a specific patch is present, it's a little more efficient to use only the CentOS kernel source (https://wiki.centos.org/HowTos/I_need_the_Kernel_Source#If_you_really_need_the_full_kernel_source), and then attempt to apply the patch in question (patch -p1 < git-patchfile). The "patch" application will tell you if it is already applied and ask if you want to reverse it, if the patch is already present. If it applies the patch, then it wasn't there already.