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I have downloaded linux kernel source v4.2.0 and built it. Now I am trying to compile one driver module and see the debug logs on console.

I am am compiling the module by following command :

make -C /lib/modules/4.2.0-16-generic/build M=$PWD

also have enabled all the kernel debug logs as below :

    #echo 8 > /proc/sys/kernel/printk

    sanjeev@sanjeev:~$ cat /proc/sys/kernel/printk
    8   4   1   7

When I load this module can't see kernel logs(having log levels) with dmesg. If I am printing messages with printk("Some message"), it is getting printing on the console, but if the same message if I am printing through printk(KERN_INFO, "Some message") it is not getting printed on the console. Am I missing any configuration while compiling the module?

Sanjeev Kumar
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1 Answers1

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This issue was coming because of the comma ',' after log level in the printk it should be printk(KERN_INFO "Some message")

Sanjeev Kumar
  • 55
  • 1
  • 9