Re: [linus:master] [iov_iter] c9eec08bac: vm-scalability.throughput -16.9% regression

[David Howells]

I get:

  LD      arch/x86/purgatory/purgatory.chk
ld: arch/x86/purgatory/purgatory.ro:(.altinstr_replacement+0x1): undefined reference to `rep_movs_alternative'
ld: arch/x86/purgatory/purgatory.ro:(.altinstr_replacement+0x6): undefined reference to `rep_movs_alternative'

The symbol is available in the arch lib directory:

warthog>nm build3/arch/x86/lib/copy_user_64.o 
0000000000000000 r __export_symbol_rep_movs_alternative
0000000000000000 T rep_movs_alternative
                 U __x86_return_thunk

so I'm not sure what's going on there.

David