✗ Fi.CI.BUILD: failure for mm: rewrite pfnmap tracking and remove VM_PAT (rev3)

[Patchwork]

== Series Details ==

Series: mm: rewrite pfnmap tracking and remove VM_PAT (rev3)
URL   : https://patchwork.freedesktop.org/series/148249/
State : failure

== Summary ==

Error: patch https://patchwork.freedesktop.org/api/1.0/series/148249/revisions/3/mbox/ not applied
Applying: x86/mm/pat: factor out setting cachemode into pgprot_set_cachemode()
Applying: mm: convert track_pfn_insert() to pfnmap_setup_cachemode*()
Applying: mm: introduce pfnmap_track() and pfnmap_untrack() and use them for memremap
Applying: mm: convert VM_PFNMAP tracking to pfnmap_track() + pfnmap_untrack()
error: sha1 information is lacking or useless (mm/memory.c).
error: could not build fake ancestor
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0004 mm: convert VM_PFNMAP tracking to pfnmap_track() + pfnmap_untrack()
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".
Build failed, no error log produced