CIP v4.4 backport patches for m68k. Basically everything needed to make v4.4 work on my Falcon. This includes my iounmap() fix, Al Viro's signal handling and uaccess page fault fixes, my 030 buserr_c fix for exception handling during page faults, and Finn's 030 signal frame fix. Patch 1 should be applied to v4.4-cip, or else ioremap / iounmap has no chance to work on 030 processors. Patches 2 and 3 have been applied to v4.4-cip. Patches 4-6 are a prerequisite for patch 8, Finn Thain's 'm68k: Move signal frame following exception on 68020/030' patch which had been applied but failed to compile (see error reported in https://lore.kernel.org/oe-kbuild-all/202401310920.sBSI4BHj-lkp@xxxxxxxxx/ which has gone away with patches 4-6 in place). Patch 7 is another page fault handling fix which should be applied (though I have found no test case for it, and cannot say how common that livelock issue is on m68k). All patches as RFC version 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
