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Date:   Sun, 1 Sep 2019 11:45:30 -0700
From:   Guenter Roeck <linux@roeck-us.net>
To:     Christoph Hellwig <hch@lst.de>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Thomas =?iso-8859-1?Q?Hellstr=F6m?= <thomas@shipmail.org>,
        Jerome Glisse <jglisse@redhat.com>,
        Jason Gunthorpe <jgg@mellanox.com>,
        Steven Price <steven.price@arm.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        Thomas Hellstrom <thellstrom@vmware.com>
Subject: Re: [PATCH 2/3] pagewalk: separate function pointers from iterator
 data
Message-ID: <20190901184530.GA18656@roeck-us.net>
References: <20190828141955.22210-1-hch@lst.de>
 <20190828141955.22210-3-hch@lst.de>
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In-Reply-To: <20190828141955.22210-3-hch@lst.de>
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Sender: linux-kernel-owner@vger.kernel.org
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On Wed, Aug 28, 2019 at 04:19:54PM +0200, Christoph Hellwig wrote:
> The mm_walk structure currently mixed data and code.  Split out the
> operations vectors into a new mm_walk_ops structure, and while we
> are changing the API also declare the mm_walk structure inside the
> walk_page_range and walk_page_vma functions.
> 
> Based on patch from Linus Torvalds.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
> Reviewed-by: Steven Price <steven.price@arm.com>
> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>

When building csky:defconfig:

In file included from mm/madvise.c:30:
mm/madvise.c: In function 'madvise_free_single_vma':
arch/csky/include/asm/tlb.h:11:11: error:
	invalid type argument of '->' (have 'struct mmu_gather')

Guenter

---
# bad: [6d028043b55e54f48fbdf62ea8ce11a4ad830cac] Add linux-next specific files for 20190830
# good: [a55aa89aab90fae7c815b0551b07be37db359d76] Linux 5.3-rc6
git bisect start 'HEAD' 'v5.3-rc6'
# good: [199d454c0775386a645dd9e80b486c346816762f] Merge remote-tracking branch 'crypto/master'
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# good: [450fd5809930dfee10dbbf351cdb2148cd022b1c] Merge remote-tracking branch 'regulator/for-next'
git bisect good 450fd5809930dfee10dbbf351cdb2148cd022b1c
# good: [12b85c8517393b5466dff225a338fc7416150df0] Merge remote-tracking branch 'tty/tty-next'
git bisect good 12b85c8517393b5466dff225a338fc7416150df0
# good: [ecda3e90e6357b15f3189ce00938ea5a20850b76] Merge remote-tracking branch 'scsi/for-next'
git bisect good ecda3e90e6357b15f3189ce00938ea5a20850b76
# good: [4cb65f973115d07578f5b8f4492da7d8295effe2] Merge remote-tracking branch 'rtc/rtc-next'
git bisect good 4cb65f973115d07578f5b8f4492da7d8295effe2
# good: [f3bf5fa4097e06b9cabb193599a012680380e52e] kernel/elfcore.c: include proper prototypes
git bisect good f3bf5fa4097e06b9cabb193599a012680380e52e
# bad: [e58b341134ca751d9c12bacded12a8b4dd51368d] Merge remote-tracking branch 'hmm/hmm'
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# good: [47f725ee7b5f5cae1f83512961bcf8b41a7a5794] RDMA/odp: remove ib_ucontext from ib_umem
git bisect good 47f725ee7b5f5cae1f83512961bcf8b41a7a5794
# good: [f9016e8058fdcd4aadc9932e045891a7b3bc8c8f] Merge remote-tracking branch 'nvmem/for-next'
git bisect good f9016e8058fdcd4aadc9932e045891a7b3bc8c8f
# good: [2f6e2a06b51e0dd9767bf37c3542ee3b5e4611d4] Merge remote-tracking branch 'pidfd/for-next'
git bisect good 2f6e2a06b51e0dd9767bf37c3542ee3b5e4611d4
# good: [d2b219ed03d45a9799e4ba780c209edf9c510d3b] mm/mmu_notifiers: add a lockdep map for invalidate_range_start/end
git bisect good d2b219ed03d45a9799e4ba780c209edf9c510d3b
# good: [4e10e8c36663a011f77d39c937aaa473fad90de3] mm: split out a new pagewalk.h header from mm.h
git bisect good 4e10e8c36663a011f77d39c937aaa473fad90de3
# bad: [5b8f3df6239c3a9b625ab4bdc69c54d4768a4f06] pagewalk: use lockdep_assert_held for locking validation
git bisect bad 5b8f3df6239c3a9b625ab4bdc69c54d4768a4f06
# bad: [923bfc561e7535f7dc2be136da75690582268cf2] pagewalk: separate function pointers from iterator data
git bisect bad 923bfc561e7535f7dc2be136da75690582268cf2
# first bad commit: [923bfc561e7535f7dc2be136da75690582268cf2] pagewalk: separate function pointers from iterator data