Hi,
On 11/16/2013 07:11 PM, Alan Stern wrote:
On Sat, 16 Nov 2013, Hans de Goede wrote:
No, Linux relies on the compiler to pack things like this together and
not put padding in, with the __packed__ attribute (don't we have a
__packed macro instead of the __attribute__() thing?)
Yes we've a __packed macro, but the norm in the usb subsys seems to be to use
__attribute__ ((__packed__)), see include/[uapi/]linux/usb/*.h
That's different. Things under include/uapi are meant for use by
userspace programs, so they can't rely on kernel-internal things like
the __packed macro.
Right, but almost all headers under include/linux/usb/*.h also use the
long form.
Regards,
Hans
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