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Got it. my git log always shows the full SHA1. I forgot 12 digits are required. > - Subject has leading but no trailing parentheses > - Subject has leading but no trailing quotes > - Subject does not match target commit subject > Just use > git log -1 --format='Fixes: %h ("%s")' > > Please do not split Fixes tags over more than one line. I sent the patch with transferEncoding=quoted-printable, and the raw message of that line shows: Fixes: b2c9e2fbba ("mm: make alloc_contig_range work at pageblock granulari= ty") Should I not use that option for git send-email? Please advise. Thanks. -- Best Regards, Yan, Zi --=_MailMate_CF8F5E42-F3DC-4F83-9C30-878F5B6E0D27_= Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQJDBAEBCgAtFiEEh7yFAW3gwjwQ4C9anbJR82th+ooFAmKNeg4PHHppeUBudmlk aWEuY29tAAoJEJ2yUfNrYfqKw1UP/0mFL7dpuL5M0tAmdTA4i5BHlqQSpuvCBEaI u0I99ZLVBFD55nWZvI5zNieFUUuw+6PE8s8XjTIOFniI1oq8axKTG2MPAL63POt5 Ea5bHXWmYFPHEKBCeTMtIz/7rIOyftSufmePtPsDjzVUNae9NlZcBUGqdJejUuw7 9nK2Yt5zN6RPsPPimM5XjK+H4ALo9tii3S4lXYwG7jBX0e2AYPp1/L+Mu65HGh47 PRiZNFWtGrnjr1P4O211Wcf3yE8Y8FJJuUzZtQpAtzdCMiyzIzuV09Pcvm9na5N6 Doq40M7AaYgOhCj3Qn8PecdF/yPDOTPdu6TIKUSJ/aSQmQtV42RavMonHTsSM2cZ cPY2LLxt1VsOTciDEHbwOoa5+UkLTbKccnfzZIKEo8B+mZGYmylAT4O36ARdi+kS iuU6F5G6PEjl/LpFYs2ud2qyQMHwT1vs5yiLKyB0glQ4CsBUmN1gL0VaGgUOdsSW arxw1p1bDkw1/EGCYAPeW8IDRxpC93+FBA59GpriVI4Tywo395kAmT66K3Zt/xdW T9w8iiwB91ZIRviEQH8+/fOqZzeezyJrh5hpkY8KzgCithGfz29mpu7xuRhoMB0F hBDNpLN4wZ0cWgGbPKeH7Q5nbBavhwaJ6JiYMJDZkYpXHXbzoma1NOLe+ICoEqPK P0cmd7wK =QVeG -----END PGP SIGNATURE----- --=_MailMate_CF8F5E42-F3DC-4F83-9C30-878F5B6E0D27_=--