tree 062fe89b801c7c017da5fc6403cab2f473492cb4
parent cb5b242c8c14a4b1dcd358400da28208fde78947
author Vasant Hegde <hegdevasant@linux.vnet.ibm.com> 1389765724 +1100
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1389766878 +1100

powerpc/powernv: Call OPAL sync before kexec'ing

Its possible that OPAL may be writing to host memory during
kexec (like dump retrieve scenario). In this situation we might
end up corrupting host memory.

This patch makes OPAL sync call to make sure OPAL stops
writing to host memory before kexec'ing.

Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>