CHECK: Please don't use multiple blank lines
#102: FILE: kernel/bpf/arena.c:555:
 
+

WARNING: line length of 86 exceeds 80 columns
#119: FILE: kernel/bpf/arena.c:589:
+	long page_cnt_max = (arena->user_vm_end - arena->user_vm_start) >> PAGE_SHIFT;

WARNING: line length of 81 exceeds 80 columns
#165: FILE: kernel/bpf/arena.c:651:
+__bpf_kfunc int bpf_arena_guard_pages(void *p__map, void *ptr__ign, u32 page_cnt)

WARNING: line length of 89 exceeds 80 columns
#183: FILE: kernel/bpf/arena.c:669:
+BTF_ID_FLAGS(func, bpf_arena_guard_pages, KF_TRUSTED_ARGS | KF_SLEEPABLE | KF_ARENA_ARG2)

total: 0 errors, 3 warnings, 1 checks, 158 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 04c9c9b56dba ("bpf/arena: add bpf_arena_guard_pages kfunc") 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, 3 warnings, 1 checks, 158 lines checked