don't build bios/contexts over multiple iomaps

Christoph Hellwig <[email protected]> Fri, 19 Jun 2026 07:00:52 +0200

Newsgroups	org.ozlabs.lists.linux-erofs,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-xfs
Message-ID	<[email protected]>

Hi all,

this patch changes how iomap submits bios for reads.  The old behavior
to build up bios across iomap was already considered problematic for
a while, but we now ran into a erofs bug because of it, so it's time
to finally fix it.

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