Re: [GIT PULL] x86 LTO changes for v3.15

[Linus Torvalds]

On Tue, Apr 1, 2014 at 5:01 PM, Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
>
> Why would they break tracing? I remember there was a issue with compat
> calls, are these related to that?

They "break" tracing by being invisible to syscall tracing. As you
really should know ;)

The syscall tracing feature depends on the wrappers that
SYSCALL_DEFINEx() creates. See the SYSCALL_TRACE_ENTER_EVENT() etc
crud in <linux/syscalls.h>

So there's no SYSCALL_METADATA for those system calls that weren't
created with the proper SYSCALL_DEFINE() wrappers.

                  Linus
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