[PATCH] x86_64: Fix int3 trap

Undo bogus change that was introduced with kprobes.  It's not
really needed and it breaks some user applications because
it changes the signal for int 3 from SIGTRAP to SIGSEGV.

Cc: <prasanna@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/x86_64/kernel/traps.c

@@ -917,7 +917,7 @@ void __init trap_init(void)
 	set_intr_gate(0,&divide_error);
 	set_intr_gate_ist(1,&debug,DEBUG_STACK);
 	set_intr_gate_ist(2,&nmi,NMI_STACK);
-	set_intr_gate(3,&int3);
+	set_system_gate(3,&int3);
 	set_system_gate(4,&overflow);	/* int4-5 can be called from all */
 	set_system_gate(5,&bounds);
 	set_intr_gate(6,&invalid_op);