mprotect() like functionality within Linux kernel
There is a good answer to this question here: https://unix.stackexchange.com/questions/450557/is-there-any-function-analogous-to-mprotect-in-the-linux-kernel.
asm-generic/set_memory.h:int set_memory_ro(unsigned long addr, int numpages);asm-generic/set_memory.h:int set_memory_rw(unsigned long addr, int numpages);asm-generic/set_memory.h:int set_memory_x(unsigned long addr, int numpages);asm-generic/set_memory.h:int set_memory_nx(unsigned long addr, int numpages);they are defined here: https://elixir.bootlin.com/linux/v4.3/source/arch/x86/include/asm/cacheflush.h#L47