On Fri, 19 Mar 2004 12:01:51 -0800
Andrew Morton [off-list ref] wrote:

We have an SMP race in the signal code.  A fix for x86 is below.  All archs
need updating.

I think the fix may need fixing :-)

Now that we're passing a stack local k_sigaction into handle_signal()
the real sigaction is not being updated f.e. when SA_ONESHOT causes
ka->sa.sa_handler to be set to SIG_DFL.  Only the stack local copy
is going to be set like this, not the one in the signals struct which
is where it is needed.

I noticed this while coding up the sparc versions which I'll defer until
this is cleared up.