CIP v4.4 backport of Al Viro's misc. m68k signal handling and page fault fixes. The first three are a prerequisite for Finn Thain's 'm68k: Move signal frame following exception on 68020/030' patch, and fix the backport compile error seen in https://lore.kernel.org/oe-kbuild-all/202401310920.sBSI4BHj-lkp@xxxxxxxxx/ RFC version of these patches to give Geert and Al a chance to yell at me in case I got details of these patches wrong. I don't claim to understand signal handling in anywhere near the required level of detail. Tested on my 68030 Atari Falcon. Cheers, Michael
