==========
checkpatch - FAILED

ERROR: trailing whitespace
#125: FILE: Documentation/networking/sfp-phylink.rst:330:
+                struct foo_priv *priv = container_of(config, struct foo_priv, phylink_config); $

total: 1 errors, 0 warnings, 0 checks, 179 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

Commit 5b09d0c8f40c ("doc: sfp-phylink: update the porting guide with PCS handling") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.