In commit

  19dbc55d400b8 ("powerpc/vtime: Initialize starttime at boot for native accounting")

Fixes tag

  Fixes: cf9efce0ce31 ("powerpc: Account time using timebase rather  than PURR")

has these problem(s):

  - Subject does not match target commit subject
    Just use
	git log -1 --format='Fixes: %h ("%s")'