tree e7dedb4f171f28b2a07f4fc759a5a7de6fc1d1e1
parent 8f21bd0090052e740944f9397e2be5ac7957ded7
author Madhavan Srinivasan <maddy@linux.vnet.ibm.com> 1380654250 +0530
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1380784973 +1000

powerpc/sysfs: Disable writing to PURR in guest mode

arch/powerpc/kernel/sysfs.c exports PURR with write permission.
This may be valid for kernel in phyp mode. But writing to
the file in guest mode causes crash due to a priviledge violation

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org>