Note that on the last line MODULE LICENSE$("$GPL$"),$ there$$s an underscore between

MODULE and LICENSE. This module defines two functions. init module is invoked when

the module is loaded into the kernel and cleanup module is called when the module is re$-$

moved from the kernel. module init and module exit are special kernel macros to indicate

the role of these two functions.

Use the Makefile below to compile the module. Even though for regular C pro$-$

grams both Makefile and makefile would work, the kernel build scripts expect

Makefile as a convention. Also, please make sure that your project directory

and sub$-$directory names do not have any white spaces, e$.$g$.,$ do not name your

directory Project $2.$ Because this Makefile uses PWD$,$ any white spaces in your project di$-$

rectory$$s path will lead to errors that are very hard to troubleshoot. Please use underscores

and dashes instead, or simply remove any white space.

obj $-$ m $+=$ hello $.$ o

all :

make $-$C $/$ lib $/$ modules $/$ $ $($ shell uname $-$r $)/$ build M $=$ $ $($ PWD $)$ modules

clean :

make $-$C $/$ lib $/$ modules $/$ $ $($ shell uname $-$r $)/$ build M $=$ $ $($ PWD $)$ clean

Do you see any errors when you type make? If so$,$ how to fix the error $(10$pts$)?$ To remove

all compiled output, do make clean. After fixing, you will need to load your module into

the kernel. Run this command using sudo