K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2019-10-13T19:33:00.680369Z
K 7
svn:log
V 488
powerpc/pmap: Tighten condition for removing tracked pages in Book-E pmap

There are cases where there's no vm_page_t structure for a given physical
address, such as the CCSR.  In this case, trying to obtain the
md.page_tracked struct member would lead to a NULL dereference, and panic.
Tighten this up by checking for kernel_pmap AND that the page structure
actually exists before dereferencing.  The flag can only be set when it's
tracked in the kernel pmap anyway.

MFC after:	3 weeks

END