Re: [GIT PULL] io_uring updates for 5.10-rc1

[Linus Torvalds]

On Mon, Oct 12, 2020 at 6:46 AM Jens Axboe <axboe@xxxxxxxxx> wrote:
>
> Here are the io_uring updates for 5.10.

Very strange. My clang build gives a warning I've never seen before:

   /tmp/io_uring-dd40c4.s:26476: Warning: ignoring changed section
attributes for .data..read_mostly

and looking at what clang generates for the *.s file, it seems to be
the "section" line in:

        .type   io_op_defs,@object      # @io_op_defs
        .section        .data..read_mostly,"a",@progbits
        .p2align        4

I think it's the combination of "const" and "__read_mostly".

I think the warning is sensible: how can a piece of data be both
"const" and "__read_mostly"? If it's "const", then it's not "mostly"
read - it had better be _always_ read.

I'm letting it go, and I've pulled this (gcc doesn't complain), but
please have a look.

                 Linus