[PATCH 4.4 008/108] powerpc/64: Convert fast_exception_return to use RFI_TO_USER/KERNEL

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Nicholas Piggin commit a08f828cf47e6c605af21d2cdec68f84e799c318 upstream. Similar to the syscall return path, in fast_exception_return we may be returning to user or kernel

[PATCH 4.4 008/108] powerpc/64: Convert fast_exception_return to use RFI_TO_USER/KERNEL

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Nicholas Piggin commit a08f828cf47e6c605af21d2cdec68f84e799c318 upstream. Similar to the syscall return path, in fast_exception_return we may be returning to user or kernel context. We already