Merge tag 'md-next-20230814-resend' of https://git.kernel.org/pub/scm/linux/kernel...

Pull MD fixes from Song:

"1. raid6test build fixes, by WANG Xuerui
 2. Various non-urgent fixes."

* tag 'md-next-20230814-resend' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()
  raid6: test: only check for Altivec if building on powerpc hosts
  raid6: test: make sure all intermediate and artifact files are .gitignored
  raid6: test: cosmetic cleanups for the test Makefile
  raid6: guard the tables.c include of <linux/export.h> with __KERNEL__
  raid6: remove the <linux/export.h> include from recov.c
  md: Hold mddev->reconfig_mutex when trying to get mddev->sync_thread
  md/raid10: fix a 'conf->barrier' leakage in raid10_takeover()
  md: raid1: fix potential OOB in raid1_remove_disk()
  md/raid5-cache: fix a deadlock in r5l_exit_log()