[PATCH] uml: Fix SIGWINCH relaying

This makes SIGWINCH work again, and fixes a couple of SIGWINCH-associated
crashes.  First, the sigio thread disables SIGWINCH because all hell breaks
loose if it ever gets one and tries to call the signal handling code.  Second,
there was a problem with deferencing tty structs after they were freed.  The
SIGWINCH support for a tty wasn't being turned off or freed after the tty went
away.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/um/kernel/tt/tracer.c b/arch/um/kernel/tt/tracer.c
index f7b1753a025c..d11e7399d7a1 100644
--- a/arch/um/kernel/tt/tracer.c
+++ b/arch/um/kernel/tt/tracer.c
@@ -26,6 +26,7 @@
 #include "kern_util.h"
 #include "chan_user.h"
 #include "ptrace_user.h"
+#include "irq_user.h"
 #include "mode.h"
 #include "tt.h"
 
@@ -33,7 +34,7 @@ static int tracer_winch[2];
 
 int is_tracer_winch(int pid, int fd, void *data)
 {
-        if(pid != tracing_pid)
+        if(pid != os_getpgrp())
                 return(0);
 
         register_winch_irq(tracer_winch[0], fd, -1, data);
@@ -119,6 +120,7 @@ static int signal_tramp(void *arg)
         signal(SIGSEGV, (__sighandler_t) sig_handler);
         set_cmdline("(idle thread)");
         set_init_pid(os_getpid());
+        init_irq_signals(0);
         proc = arg;
         return((*proc)(NULL));
 }