From: Russell King <rmk@arm.linux.org.uk>

Here is a patch which updates various serial drivers in the kernel to make
them less broken than they were before.  Nevertheless, they are still
broken.

The improvement is to make these drivers use the tiocmget/tiocmset methods,
which are present in the 2.6 kernel.

Many of these have been incorrectly converted from the old global IRQ
locking without regard for SMP issues, or still use the old global IRQ
locking methods which are no longer present in 2.6 kernels.

The full message thread can be found at:

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=1dvnl-5Pr-1%40gated-at.bofh.it&rnum=1&prev=/groups%3Fhl%3Den%26lr%3D%26ie%3DISO-8859-1%26q%3DOutstanding%2Bfixups%26btnG%3DGoogle%2BSearch%26meta%3Dgroup%253Dlinux.kernel