tree bc64c9059b85aec589d66e2c38a6510d0778d2f8
parent 28df2f83c39554d9e64cd9d2a93b8e28e24df5b7
author Helge Deller <deller@gmx.de> 1514921804 +0100
committer Helge Deller <deller@gmx.de> 1514928114 +0100

parisc: Fix alignment of pa_tlb_lock in assembly on 32-bit SMP kernel

Qemu for PARISC reported on a 32bit SMP parisc kernel strange failures
about "Not-handled unaligned insn 0x0e8011d6 and 0x0c2011c9."

Those opcodes evaluate to the ldcw() assembly instruction which requires
(on 32bit) an alignment of 16 bytes to ensure atomicity.

As it turns out, qemu is correct and in our assembly code in entry.S and
pacache.S we don't pay attention to the required alignment.

This patch fixes the problem by aligning the lock offset in assembly
code in the same manner as we do in our C-code.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v4.0+