RE: [patch 2/4] ia64 use trace hook

["Luck, Tony" <tony.luck@xxxxxxxxx>]

There is one warning from the compiler:

arch/ia64/kernel/ptrace.c:1243: warning: ignoring return value of 'tracehook_report_syscall_entry', declared with attribute warn_unused_result

Caused by this part of patch 2:

Index: linux/arch/ia64/kernel/ptrace.c
...
@@ -1260,9 +1239,8 @@ syscall_trace_enter (long arg0, long arg
                     long arg4, long arg5, long arg6, long arg7,
                     struct pt_regs regs)
...
+       if (test_thread_flag(TIF_SYSCALL_TRACE))
+               tracehook_report_syscall_entry(&regs);

But apart from that it all seems OK.

How do I tell whether it is all working?  Roland's wiki
that you pointed to in patch 0/4 doesn't have any testing
tips (and seems to have some old information ... it talks
about CONFIG_UTRACE being available after HAVE_ARCH_TRACEHOOK
is enabled ... but grep says there are no UTRACE references in
the kernel).

-Tony
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