scripts/bpf_doc.py:55: SyntaxWarning: invalid escape sequence '\w'
scripts/bpf_doc.py:57: SyntaxWarning: invalid escape sequence '\*'
scripts/bpf_doc.py:104: SyntaxWarning: invalid escape sequence '\*'
scripts/bpf_doc.py:108: SyntaxWarning: invalid escape sequence '\*'
scripts/bpf_doc.py:123: SyntaxWarning: invalid escape sequence '\*'
scripts/bpf_doc.py:131: SyntaxWarning: invalid escape sequence '\*'
scripts/bpf_doc.py:145: SyntaxWarning: invalid escape sequence '\*'
scripts/bpf_doc.py:154: SyntaxWarning: invalid escape sequence '\*'
scripts/bpf_doc.py:168: SyntaxWarning: invalid escape sequence '\*'
scripts/bpf_doc.py:375: SyntaxWarning: invalid escape sequence '\ '
scripts/bpf_doc.py:457: SyntaxWarning: invalid escape sequence '\ '
mm/truncate.c:254:6: error: implicit declaration of function 'folio_ref_count' [-Werror,-Wimplicit-function-declaration]
mm/truncate.c:254:22: error: use of undeclared identifier 'folio'
:255:4: error: implicit declaration of function 'folio_nr_pages' [-Werror,-Wimplicit-function-declaration]
mm/truncate.c:255:19: error: use of undeclared identifier 'folio'
mm/truncate.c:255:28: error: implicit declaration of function 'folio_has_private' [-Werror,-Wimplicit-function-declaration]
mm/truncate.c:255:46: error: use of undeclared identifier 'folio'