devmem-full-access
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Allow unrestricted access to /dev/mem device on restricted Linux kernels

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Update module to use livepatch

Fixes #1

Hello1024

No longer works on recent kernels because kallsyms_lookup_name is unexported.

``` # make make -C /lib/modules/5.8.0-43-generic/build M=/home/foo/devmem-full-access modules make[1]: Entering directory '/usr/src/linux-headers-5.8.0-43-generic' MODPOST /home/foo/devmem-full-access/Module.symvers ERROR: modpost: "kallsyms_lookup_name" [/home/foo/devmem-full-access/devmem-full-access.ko] undefined! make[2]: *** [scripts/Makefile.modpost:111: /home/foo/devmem-full-access/Module.symvers] Error 1 make[2]: *** Deleting file '/home/foo/devmem-full-access/Module.symvers'...

Hello1024