Arnd Bergmann
4b7775870b
Introduce compat_u64 and compat_s64 types
...
One common problem with 32 bit system call and ioctl emulation is the
different alignment rules between i386 and 64 bit machines. A number of
drivers work around this by marking the compat structures as
'attribute((packed))', which is not the right solution because it breaks
all the non-x86 architectures that want to use the same compat code.
Hopefully, this patch improves the situation, it introduces two new types,
compat_u64 and compat_s64. These are defined on all architectures to have
the same size and alignment as the 32 bit version of u64 and s64.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Vasily Tarasov <vtaras@openvz.org>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:48 -07:00
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