WARNING: 'seperate' may be misspelled - perhaps 'separate'?
#6: 
To simplify struct page, the effort to seperate its own descriptor from
                                       ^^^^^^^^

WARNING: line length of 90 exceeds 80 columns
#44: FILE: drivers/net/netdevsim/netdev.c:850:
+		ns->netmem = page_pool_dev_alloc_netmem(ns->rq[0]->page_pool, NULL, NULL);

WARNING: line length of 88 exceeds 80 columns
#50: FILE: drivers/net/netdevsim/netdev.c:854:
+		page_pool_put_full_netmem(netmem_get_pp(ns->netmem), ns->netmem, false);

WARNING: line length of 88 exceeds 80 columns
#63: FILE: drivers/net/netdevsim/netdev.c:1081:
+		page_pool_put_full_netmem(netmem_get_pp(ns->netmem), ns->netmem, false);

total: 0 errors, 4 warnings, 0 checks, 51 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 cf68e6ed2da8 ("netdevsim: use netmem descriptor and APIs for page pool") 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, 4 warnings, 0 checks, 51 lines checked