depmod.conf, depmod.d - Configuration file/directory for depmod
The order in which modules are processed by the depmod command can be
altered on a global or per-module basis. This is typically useful in
cases where built-in kernel modules are complemented by custom built
versions of the same and the user wishes to affect the priority of pro‐
cessing in order to override the module version supplied by the kernel.
The format of depmod.conf and files under depmod.d is simple: one com‐
mand per line, with blank lines and lines starting with '#' ignored
(useful for adding comments). A '\' at the end of a line causes it to
continue on the next line, which makes the file a bit neater.
This allows you to specify the order in which /lib/modules (or
other configured module location) subdirectories will be pro‐
cessed by depmod. Directories are listed in order, with the
highest priority given to the first listed directory and the
lowest priority given to the last directory listed. The special
keyword built-in refers to the standard module directories
installed by the kernel.
By default, depmod will give a higher priority to a directory
with the name updates using this built-in search string:
"updates built-in" but more complex arrangements are possible
and are used in several popular distributions.
override modulename kernelversion modulesubdirectory
This command allows you to override which version of a specific
module will be used when more than one module sharing the same
name is processed by the depmod command. It is possible to spec‐
ify one kernel or all kernels using the * wildcard. modulesub‐
directory is the name of the subdirectory under /lib/modules (or
other module location) where the target module is installed.
For example, it is possible to override the priority of an
updated test module called kmp by specifying the following com‐
mand: "override kmp * extra". This will ensure that any match‐
ing module name installed under the extra subdirectory within
/lib/modules (or other module location) will take priority over
any likenamed module already provided by the kernel.
This manual page Copyright 2006, Jon Masters, Red Hat, Inc.