On Tue, 12 Feb 2019, Aubrey Li wrote: > diff --git a/arch/x86/include/asm/processor.h > b/arch/x86/include/asm/processor.h > index d53c54b842da..60ee932070fe 100644 > --- a/arch/x86/include/asm/processor.h > +++ b/arch/x86/include/asm/processor.h > @@ -996,5 +996,7 @@ enum l1tf_mitigations { > }; > > extern enum l1tf_mitigations l1tf_mitigation; > +/* Add support for architecture specific output in /proc/pid/status */ > +extern void arch_proc_pid_status(struct seq_file *m, struct task_struct > *task);
Sigh. This is absolutely the wrong place. The weak function is declared and used in fs/proc/... So the prototype wants to be in a header which is included from there independent of x86... Thanks, tglx