Why make printing "make: nothing needs to be done for" everything. ""

Question

This is the "Hello.c" and "Makefile" module. After executing makefrom the woking directory, I get the following message:

make: do nothing for `all '.

This is the Hello.c file:

#include <linux/module.h>    // included for all kernel modules
#include <linux/kernel.h>    // included for KERN_INFO
#include <linux/init.h>      // included for __init and __exit macros

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Lakshmanan");
MODULE_DESCRIPTION("A Simple Hello World module");

static int __init hello_init(void) {
  printk(KERN_INFO "Hello world!\n");
  return 0;    // Non-zero return means that the module couldn't be
}

static void __exit hello_cleanup(void) {
    printk(KERN_INFO "Cleaning up module.\n");
}   

module_init(hello_init); 
module_exit(hello_cleanup);

And the "Makefile":

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

I tried all the suggestions and I got this in the terminal:

root@stupid-HP:/home/stupid/cpz/module$ pwd
/home/stupid/cpz/module
root@stupid-HP:/home/stupid/cpz/module$ ls
hello.c  Makefile
root@stupid-HP:/home/stupid/cpz/module$ make
make: Nothing to be done for `all'.
root@stupid-HP:/home/stupid/cpz/module$ make clean
make: Nothing to be done for `clean'.
root@stupid-HP:/home/stupid/cpz/module$ make clean all
make: Nothing to be done for `clean'.
make: Nothing to be done for `all'.
root@stupid-HP:/home/stupid/cpz/module$ ls
hello.c  Makefile
root@stupid-HP:/home/stupid/cpz/module$ make
make: Nothing to be done for `all'.
root@stupid-HP:/home/stupid/cpz/module$ vi hello.c  # modified again
root@stupid-HP:/home/stupid/cpz/module$ make clean
make: Nothing to be done for `clean'.
root@stupid-HP:/home/stupid/cpz/module$ make
make: Nothing to be done for `all'.

Answer 1

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Answer 2

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Answer 3

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make clean make Hello.c .

Answer 4

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Answer 6

Makefile. make .

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