[GIT PULL] Few printk fixups for 7.4

[Petr Mladek]

Hi Linus,

please pull few printk fixups from

  git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux.git tags/printk-for-7.4-fixups

================================================================

- Prevent possible use-after-free when printk kthreads could not be created

- Fix computation of the free space when allocating a bigger ring buffer

- Add info about the new printk mailing list for printk-related subsystems

----------------------------------------------------------------
John Ogness (1):
      printk: Avoid multiple unregistration in unregister_console_locked()

Petr Mladek (1):
      MAINTAINERS: Add new "printk" mailing list for PRINTK, PRINTK INDEXING, and VSPRINTF

Wang Wensheng (1):
      printk_ringbuffer: Fix space_used() when blk_lpos->next overflows

 MAINTAINERS                       |  3 +++
 kernel/printk/printk.c            | 34 ++++++++++++++++++++++++++++++----
 kernel/printk/printk_ringbuffer.c |  8 +++-----
 3 files changed, 36 insertions(+), 9 deletions(-)