Messages in this thread | | | Date | Mon, 25 May 2020 15:19:12 -0700 | From | Andrew Morton <> | Subject | Re: clean up and streamline probe_kernel_* and friends v4 |
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On Thu, 21 May 2020 17:22:38 +0200 Christoph Hellwig <hch@lst.de> wrote:
> this series start cleaning up the safe kernel and user memory probing > helpers in mm/maccess.c, and then allows architectures to implement > the kernel probing without overriding the address space limit and > temporarily allowing access to user memory. It then switches x86 > over to this new mechanism by reusing the unsafe_* uaccess logic. > > This version also switches to the saner copy_{from,to}_kernel_nofault > naming suggested by Linus. > > I kept the x86 helpers as-is without calling unsage_{get,put}_user as > that avoids a number of hard to trace casts, and it will still work > with the asm-goto based version easily.
hm. Applying linux-next to this series generates a lot of rejects against powerpc:
-rw-rw-r-- 1 akpm akpm 493 May 25 15:06 arch/powerpc/kernel/kgdb.c.rej -rw-rw-r-- 1 akpm akpm 6461 May 25 15:06 arch/powerpc/kernel/trace/ftrace.c.rej -rw-rw-r-- 1 akpm akpm 447 May 25 15:06 arch/powerpc/mm/fault.c.rej -rw-rw-r-- 1 akpm akpm 623 May 25 15:06 arch/powerpc/perf/core-book3s.c.rej -rw-rw-r-- 1 akpm akpm 1408 May 25 15:06 arch/riscv/kernel/patch.c.rej
the arch/powerpc/kernel/trace/ftrace.c ones aren't very trivial.
It's -rc7. Perhaps we should park all this until 5.8-rc1?
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