tree ffc4237dbeed66492124ef2ccecf48db0767531a
parent ec1ab0abde0af586a59541ad71841f022dcac3e7
author Christoph Hellwig <hch@lst.de> 1227863349 +0100
committer Al Viro <viro@zeniv.linux.org.uk> 1238179437 -0400

generic compat_sys_ustat

Due to a different size of ino_t ustat needs a compat handler, but
currently only x86 and mips provide one.  Add a generic compat_sys_ustat
and switch all architectures over to it.  Instead of doing various
user copy hacks compat_sys_ustat just reimplements sys_ustat as
it's trivial.  This was suggested by Arnd Bergmann.

Found by Eric Sandeen when running xfstests/017 on ppc64, which causes
stack smashing warnings on RHEL/Fedora due to the too large amount of
data writen by the syscall.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>