Re: [PATCH 6/8] i915,uaccess: Fix redundant CLAC

[Linus Torvalds]

On Fri, Mar 1, 2019 at 2:35 AM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>
> With the dodgy patch:
>
> CC      drivers/gpu/drm/i915/i915_gem_execbuffer.o
> drivers/gpu/drm/i915/i915_gem_execbuffer.o: warning: objtool: eb_relocate_slow()+0x1f9: call to kvfree() with UACCESS enabled
> drivers/gpu/drm/i915/i915_gem_execbuffer.o: warning: objtool: i915_gem_execbuffer2_ioctl()+0x315: call to kvfree() with UACCESS enabled

Ok, so it looks like your patch does the right thing. Your fixups to
i915_gem_execbuffer.c (and the already commented-upon copy_user_tail
thing) also look sane.

               Linus