From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 11 Nov 2009 03:39:40 +0000 (+0000)
Subject: net/compat: fix dev_ifsioc emulation corner cases
X-Git-Tag: v2.6.33-rc1~388^2~397
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a2116ed223c88b6c424f42398e54d1607dc785ba;p=pandora-kernel.git

net/compat: fix dev_ifsioc emulation corner cases

Handling for SIOCSHWTSTAMP is broken on architectures
with a split user/kernel address space like s390,
because it passes a real user pointer while using
set_fs(KERNEL_DS).
A similar problem might arise the next time somebody
adds code to dev_ifsioc.

Split up dev_ifsioc into three separate functions for
SIOCSHWTSTAMP, SIOC*IFMAP and all other numbers so
we can get rid of set_fs in all potentially affected
cases.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Patrick Ohly <patrick.ohly@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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