summaryrefslogtreecommitdiff
path: root/arch/unicore32/Makefile
diff options
context:
space:
mode:
authorLaurent Dufour <ldufour@linux.vnet.ibm.com>2014-02-24 20:30:55 +0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-02-28 11:06:25 +0400
commitf5295bd8ea8a65dc5eac608b151386314cb978f1 (patch)
tree826f84e36044824ce00d8af118afc720078e37e8 /arch/unicore32/Makefile
parent41dd03a94c7d408d2ef32530545097f7d1befe5c (diff)
downloadlinux-f5295bd8ea8a65dc5eac608b151386314cb978f1.tar.xz
powerpc/crashdump : Fix page frame number check in copy_oldmem_page
In copy_oldmem_page, the current check using max_pfn and min_low_pfn to decide if the page is backed or not, is not valid when the memory layout is not continuous. This happens when running as a QEMU/KVM guest, where RTAS is mapped higher in the memory. In that case max_pfn points to the end of RTAS, and a hole between the end of the kdump kernel and RTAS is not backed by PTEs. As a consequence, the kdump kernel is crashing in copy_oldmem_page when accessing in a direct way the pages in that hole. This fix relies on the memblock's service memblock_is_region_memory to check if the read page is part or not of the directly accessible memory. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Tested-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> CC: <stable@vger.kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/unicore32/Makefile')
0 files changed, 0 insertions, 0 deletions