WARNING: line length of 81 exceeds 80 columns
#27: FILE: kernel/bpf/arena.c:46:
+static void arena_free_pages(struct bpf_arena *arena, long uaddr, long page_cnt);

WARNING: line length of 89 exceeds 80 columns
#50: FILE: kernel/bpf/arena.c:517:
+	 * Cap allocation size to KMALLOC_MAX_CACHE_SIZE so kmalloc_nolock() can succeed.

WARNING: line length of 84 exceeds 80 columns
#52: FILE: kernel/bpf/arena.c:519:
+	alloc_pages = min(page_cnt, KMALLOC_MAX_CACHE_SIZE / sizeof(struct page *));

WARNING: line length of 85 exceeds 80 columns
#53: FILE: kernel/bpf/arena.c:520:
+	pages = kmalloc_nolock(alloc_pages * sizeof(struct page *), 0, NUMA_NO_NODE);

ERROR: space required before the open parenthesis '('
#88: FILE: kernel/bpf/arena.c:543:
+	while(remaining) {

WARNING: line length of 96 exceeds 80 columns
#90: FILE: kernel/bpf/arena.c:545:
+		/* zeroing is needed, since alloc_pages_bulk() only fills in non-zero entries */

WARNING: line length of 83 exceeds 80 columns
#94: FILE: kernel/bpf/arena.c:549:
+		ret = bpf_map_alloc_pages(&arena->map, node_id, this_batch, pages);

WARNING: line length of 83 exceeds 80 columns
#98: FILE: kernel/bpf/arena.c:553:
+		/* Earlier checks made sure that uaddr32 + page_cnt * PAGE_SIZE - 1

WARNING: line length of 82 exceeds 80 columns
#102: FILE: kernel/bpf/arena.c:557:
+		 * kern_vm_start + uaddr32 + page_cnt * PAGE_SIZE - 1 can overflow

WARNING: line length of 91 exceeds 80 columns
#106: FILE: kernel/bpf/arena.c:561:
+					  kern_vm_start + uaddr32 + (mapped << PAGE_SHIFT),

WARNING: line length of 95 exceeds 80 columns
#107: FILE: kernel/bpf/arena.c:562:
+					  this_batch << PAGE_SHIFT, apply_range_set_cb, &data);

WARNING: line length of 91 exceeds 80 columns
#109: FILE: kernel/bpf/arena.c:564:
+			/* data.i pages were mapped, account them and free the remaining */

WARNING: line length of 92 exceeds 80 columns
#128: FILE: kernel/bpf/arena.c:581:
+		arena_free_pages(arena, clear_lo32(arena->user_vm_start) + uaddr32, mapped);

total: 1 errors, 12 warnings, 0 checks, 109 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 5cc5dbdd2c59 ("bpf: arena: use kmalloc_nolock() in place of kvcalloc()") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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.