WARNING: Unknown commit id '91a4599c2ad8', maybe rebased or not pulled?
#20: 
Fixes: 91a4599c2ad8 ("tcp_cubic: fix to run bictcp_update() at least once per RTT")

WARNING: line length of 98 exceeds 80 columns
#42: FILE: net/ipv4/tcp_cubic.c:226:
+	    (s32)(tcp_jiffies32 - ca->last_time) <= min(HZ / 32, usecs_to_jiffies(ca->delay_min)))

total: 0 errors, 2 warnings, 0 checks, 13 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.

Commit 217354556eb8 ("tcp_cubic: fix to run bictcp_update() at least once per RTT") 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.
total: 0 errors, 2 warnings, 0 checks, 13 lines checked