net/xen-netback: disable on 64KB page granularity

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Building the linux-3.16 stable branch, I ran into this warning that
shows a serious problem in the xen-netback driver:

drivers/net/xen-netback/netback.c: In function 'xenvif_dealloc_kthread':
drivers/net/xen-netback/netback.c:2002:1: error: the frame size of 16384 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]

The bug was fixed in linux-4.4, but for any older stable kernel we
either need to backport that fix, or not use the driver when the page
size is set to 64KB. As the proper fix is way bigger than the usual limit
for stable backport patches, this adds a Kconfig dependency.

Fixes: d0089e8a0e ("net/xen-netback: Make it running on 64KB page granularity")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Arnd Bergmann 2017-05-09 12:05:01 +02:00 • committed by Ben Hutchings

parent 476829725f

commit f63a372e33

1 changed files with 3 additions and 0 deletions

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drivers/net/Kconfig

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