[PATCH] UML - Remove bogus __NR_sigreturn check

[Jeff Dike]

Before Bodo's signal fixes and my signal delivery rework, it was possible for
a process to execute UML code by running the default signal restorer.  This
is no longer possible, so this check can be removed from the sanity test for
UML accidentally tracing itself.

Signed-off-by: Jeff Dike <jdike@xxxxxxxxxxx>

Index: 2.6.9/arch/um/kernel/tt/syscall_user.c
===================================================================
--- 2.6.9.orig/arch/um/kernel/tt/syscall_user.c	2004-12-03 12:46:55.000000000 -0500
+++ 2.6.9/arch/um/kernel/tt/syscall_user.c	2004-12-03 12:50:39.000000000 -0500
@@ -57,8 +57,7 @@
 
 	UPT_SYSCALL_NR(TASK_REGS(task)) = PT_SYSCALL_NR(proc_regs);
 
-	if((syscall != __NR_sigreturn) &&
-	   ((unsigned long *) PT_IP(proc_regs) >= &_stext) && 
+	if(((unsigned long *) PT_IP(proc_regs) >= &_stext) && 
 	   ((unsigned long *) PT_IP(proc_regs) <= &_etext))
 		tracer_panic("I'm tracing myself and I can't get out");
 

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