powerpc: subpage_protect: Increase the array size to take care of 64TB
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tue, 15 Jul 2014 14:52:30 +0000 (20:22 +0530)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tue, 22 Jul 2014 05:55:55 +0000 (15:55 +1000)
commitdad6f37c2602e4af6c3aecfdb41f2d8bd4668163
tree6dbff4666fddea21b95c4c11cc58de6ec6a83f9d
parente698b9667879b79e479cc985f9d74ecf126e343e
powerpc: subpage_protect: Increase the array size to take care of 64TB

We now support TASK_SIZE of 16TB, hence the array should be 8.

Fixes the below crash:

Unable to handle kernel paging request for data at address 0x000100bd
Faulting instruction address: 0xc00000000004f914
cpu 0x13: Vector: 300 (Data Access) at [c000000fea75fa90]
    pc: c00000000004f914: .sys_subpage_prot+0x2d4/0x5c0
    lr: c00000000004fb5c: .sys_subpage_prot+0x51c/0x5c0
    sp: c000000fea75fd10
   msr: 9000000000009032
   dar: 100bd
 dsisr: 40000000
  current = 0xc000000fea6ae490
  paca    = 0xc00000000fb8ab00   softe: 0        irq_happened: 0x00
    pid   = 8237, comm = a.out
enter ? for help
[c000000fea75fe30c00000000000a164 syscall_exit+0x0/0x98

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/include/asm/mmu-hash64.h