Messages in this thread | | | From | Linus Torvalds <> | Date | Wed, 24 Jun 2020 10:19:16 -0700 | Subject | Re: [PATCH 03/11] fs: add new read_uptr and write_uptr file operations |
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On Wed, Jun 24, 2020 at 9:29 AM Christoph Hellwig <hch@lst.de> wrote: > > Add two new file operations that are identical to ->read and ->write > except that they can also safely take kernel pointers using the uptr_t > type.
Honestly, I think this is the wrong way to go.
All of this new complexity and messiness, just to remove a few unimportant final cases?
If somebody can't be bothered to convert a driver to iter_read/iter_write, why would they be bothered to convert it to read_uptr/write_uptr?
And this messiness will stay around for decades.
So let's not go down that path.
If you want to do "splice() and kernel_read() requires read_iter" (with a warning so that we find any cases), then that's fine. But let's not add yet _another_ read type.
Why did you care so much about sysctl, and why couldn't they use the iter ops?
Linus
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