Here's a 2.4 version of the signal changes that were accepted into the 2.5
tree for thread groups.  It redirects signals to any task in a thread group
to the thread group leader.  It then introduces a tkill() system call for
signals directed at a specific task.

This patch does not introduce any behavior changes outside thread groups,
and as far as I know no one is using thread groups in 2.4.  It has been in
2.5 for awhile with no problems surfacing.

I'm sending it as a plain text attachment rather than try to fight with my
mailer again.  I hope that's acceptable.

Dave McCracken

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Dave McCracken          IBM Linux Base Kernel Team      1-512-838-3059
dmccr@us.ibm.com                                        T/L   678-3059