mm-make-pte_marker_swapin_error-more-general-fix

fix CONFIG_MMU=n build

Cc: Axel Rasmussen <[e-mail]>
Cc: Peter Xu <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

include/linux/mm_inline.h

···
 	return atomic_read(&mm->tlb_flush_pending) > 1;
 }
 
+#ifdef CONFIG_MMU
 /*
  * Computes the pte marker to copy from the given source entry into dst_vma.
  * If no marker should be copied, returns 0.
···
 
 	return dstm;
 }
+#endif
 
 /*
  * If this pte is wr-protected by uffd-wp in any form, arm the special pte to