linux-kernel - RE: [PATCH v2 3/3] x86/mce: Drop copyin special case for #MC

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Date:   Mon, 20 Sep 2021 16:18:58 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     Jue Wang <juew@...gle.com>, Ding Hui <dinghui@...gfor.com.cn>,
        "naoya.horiguchi@....com" <naoya.horiguchi@....com>,
        "osalvador@...e.de" <osalvador@...e.de>,
        "Song, Youquan" <youquan.song@...el.com>,
        "huangcun@...gfor.com.cn" <huangcun@...gfor.com.cn>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 3/3] x86/mce: Drop copyin special case for #MC

> Can we name some of those fixes here pls?

Some/all of this bunch from Al Viro:

a180bd1d7e16 iov_iter: remove uaccess_kernel() warning from iov_iter_init()
6852df126699 csum_and_copy_to_pipe_iter(): leave handling of csum_state to caller
2a510a744beb clean up copy_mc_pipe_to_iter()
893839fd5733 pipe_zero(): we don't need no stinkin' kmap_atomic()...
2495bdcc86dc iov_iter: clean csum_and_copy_...() primitives up a bit
55ca375c5dcc copy_page_from_iter(): don't need kmap_atomic() for kvec/bvec cases
c1d4d6a9ae88 copy_page_to_iter(): don't bother with kmap_atomic() for bvec/kvec cases
4b179e9a9c7c iterate_xarray(): only of the first iteration we might get offset != 0
a6e4ec7bfd32 pull handling of ->iov_offset into iterate_{iovec,bvec,xarray}
7baa5099002f iov_iter: make iterator callbacks use base and len instead of iovec
622838f3fde2 iov_iter: make the amount already copied available to iterator callbacks
21b56c847753 iov_iter: get rid of separate bvec and xarray callbacks
1b4fb5ffd79b iov_iter: teach iterate_{bvec,xarray}() about possible short copies
7491a2bf64e3 iterate_bvec(): expand bvec.h macro forest, massage a bit
5c67aa90cd5c iov_iter: unify iterate_iovec and iterate_kvec
7a1bcb5d255d iov_iter: massage iterate_iovec and iterate_kvec to logics similar to iterate_bvec
f5da83545f4e iterate_and_advance(): get rid of magic in case when n is 0
594e450b3f44 csum_and_copy_to_iter(): massage into form closer to csum_and_copy_from_iter()
f0b65f39ac50 iov_iter: replace iov_iter_copy_from_user_atomic() with iterator-advancing variant
e4f8df86798a [xarray] iov_iter_npages(): just use DIV_ROUND_UP()
66531c65aa25 iov_iter_npages(): don't bother with iterate_all_kinds()
3d671ca62a08 get rid of iterate_all_kinds() in iov_iter_get_pages()/iov_iter_get_pages_alloc()
610c7a71543d iov_iter_gap_alignment(): get rid of iterate_all_kinds()
9221d2e37b72 iov_iter_alignment(): don't bother with iterate_all_kinds()
8409a0d261e2 sanitize iov_iter_fault_in_readable()
185ac4d43669 iov_iter: optimize iov_iter_advance() for iovec and kvec
8cd54c1c8480 iov_iter: separate direction from flavour
556351c1c09a iov_iter_advance(): don't modify ->iov_offset for ITER_DISCARD
28f38db7edbf iov_iter: reorder handling of flavours in primitives
4b6c132b7da6 iov_iter: switch ..._full() variants of primitives to use of iov_iter_revert()
3b3fc051cd2c iov_iter_advance(): use consistent semantics for move past the end
0e8f0d674015 [xarray] iov_iter_fault_in_readable() should do nothing in xarray case
a506abc7b644 copy_page_to_iter(): fix ITER_DISCARD case
08aa64796016 teach copy_page_to_iter() to handle compound pages
66cd071a1f83 iov_iter: Remove iov_iter_for_each_range()

-Tony