parisc: Fix stack unwinder

Debugging shows a large number of unaligned access traps in the unwinder
code. Code analysis reveals a number of issues with this code:

- handle_interruption is passed twice through
  dereference_kernel_function_descriptor()
- ret_from_kernel_thread, syscall_exit, intr_return,
  _switch_to_ret, and _call_on_stack are passed through
  dereference_kernel_function_descriptor() even though they are
  not declared as function pointers.

To fix the problems, drop one of the calls to
dereference_kernel_function_descriptor() for handle_interruption,
and compare the other pointers directly.

Fixes: 6414b30b39f9 ("parisc: unwind: Avoid missing prototype warning for handle_interruption()")
Fixes: 8e0ba125c2bf ("parisc/unwind: fix unwinder when CONFIG_64BIT is enabled")
Cc: Helge Deller <[email protected]>
Cc: Sven Schnelle <[email protected]>
Cc: John David Anglin <[email protected]>
Cc: Charlie Jenkins <[email protected]>
Cc: David Laight <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Helge Deller <[email protected]>

0 files changed, 0 insertions, 0 deletions