Public bug reported:

When booting a snapdragon kernel, one can see that there's a warning
like this:

[    0.000000] **********************************************************
[    0.000000] **   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
[    0.000000] **                                                      **
[    0.000000] ** trace_printk() being used. Allocating extra memory.  **
[    0.000000] **                                                      **
[    0.000000] ** This means that this is a DEBUG kernel and it is     **
[    0.000000] ** unsafe for production use.                           **
[    0.000000] **                                                      **
[    0.000000] ** If you see this message and you are not debugging    **
[    0.000000] ** the kernel, report this immediately to your vendor!  **
[    0.000000] **                                                      **
[    0.000000] **   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
[    0.000000] **********************************************************

** Affects: linux-snapdragon (Ubuntu)
     Importance: Undecided
     Assignee: Jesse Sung (wenchien)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1780063

Title:
  There's a warning stating that "trace_printk() being used... this is a
  DEBUG kernel" on boot

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