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See http://www.infradead.org/rpr.html X-Rspamd-Queue-Id: CA7BF10061F60 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Aug 28, 2020 at 07:40:08PM +0200, Arnd Bergmann wrote: > Every syscall that passes an iovec seems to do this. If we make import_iovec() > handle both cases directly, this syscall and a number of others can > be simplified, and you avoid the x32 entry point I mentioned above FYI, I do have a series that does this (even tested) and kills tons of compat syscalls by that. But by doing that I found the problem that compat syscalls issued by io_uring don't trigger in_compat_syscall(). I need to go back to fixing the io_uring vs in_compat_syscall() issue (probably for 5.9) and then submit the whole thing.