tree 58b9efad0679f180ac7cb8afc74a8b682884b2c1
parent 1aff44abf68a8000fcb3502fc2b704f20de4535f
author Stafford Horne <shorne@gmail.com> 1676110446 +0900
committer Stafford Horne <shorne@gmail.com> 1682518086 +0100

openrisc: Properly store r31 to pt_regs on unhandled exceptions

In commit 91993c8c2ed5 ("openrisc: use shadow registers to save regs on
exception") the unhandled exception path was changed to do an early
store of r30 instead of r31.  The entry code was not updated and r31 is
not getting stored to pt_regs.

This patch updates the entry handler to store r31 instead of r30.  We
also remove some misleading commented out store r30 and r31
instructrions.

I noticed this while working on adding floating point exception
handling,  This issue probably would never impact anything since we kill
the process or Oops right away on unhandled exceptions.

Fixes: 91993c8c2ed5 ("openrisc: use shadow registers to save regs on exception")
Signed-off-by: Stafford Horne <shorne@gmail.com>