microblaze: Remove r0_ram pointer and PTO alignment

r0_ram pool was used for saving/restoring register
content if hw exception happen. This poll was replaced by
pt_pool_space with PT_SIZE size.
Based on this change SAVE_STATE_ARG_SPACE was removed which
caused that PTO offset is zero that's why is also removed.

r0_ram space was used as scratchpad by v850. In early
Microblaze Linux developing phase was this part of code
blindly copied.

Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index ba7c4b16ed35..968648a81c1e 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -159,7 +159,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
         }
 
         /* FIXME STATE_SAVE_PT_OFFSET; */
-        ti->cpu_context.r1  = (unsigned long)childregs - STATE_SAVE_ARG_SPACE;
+        ti->cpu_context.r1  = (unsigned long)childregs;
         /* we should consider the fact that childregs is a copy of the parent
          * regs which were saved immediately after entering the kernel state
          * before enabling VM. This MSR will be restored in switch_to and