WARNING: line length of 85 exceeds 80 columns
#137: FILE: include/linux/bpf.h:1560:
+	struct llist_head log;	/* list of in-flight stream elements in LIFO order */

WARNING: line length of 94 exceeds 80 columns
#140: FILE: include/linux/bpf.h:1563:
+	struct llist_node *backlog_head; /* list of in-flight stream elements in FIFO order */

CHECK: Please don't use multiple blank lines
#164: FILE: include/linux/bpf.h:2443:
 
+

WARNING: line length of 105 exceeds 80 columns
#174: FILE: include/linux/bpf.h:3611:
+int bpf_prog_stream_read(struct bpf_prog *prog, enum bpf_stream_id stream_id, void __user *buf, int len);

CHECK: Macro argument 'ss' may be better as '(ss)' to avoid precedence issues
#182: FILE: include/linux/bpf.h:3619:
+#define bpf_stream_printk(ss, ...) bpf_stream_stage_printk(&ss, __VA_ARGS__)

CHECK: Macro argument 'ss' may be better as '(ss)' to avoid precedence issues
#184: FILE: include/linux/bpf.h:3621:
+#define bpf_stream_stage(ss, prog, stream_id, expr)            \
+	({                                                     \
+		bpf_stream_stage_init(&ss);                    \
+		(expr);                                        \
+		bpf_stream_stage_commit(&ss, prog, stream_id); \
+		bpf_stream_stage_free(&ss);                    \
+	})

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#299: 
new file mode 100644

WARNING: line length of 86 exceeds 80 columns
#341: FILE: kernel/bpf/stream.c:38:
+#define BPF_STREAM_PAGE_SZ (PAGE_SIZE - offsetofend(struct bpf_stream_page, consumed))

WARNING: line length of 83 exceeds 80 columns
#401: FILE: kernel/bpf/stream.c:98:
+static int bpf_stream_page_check_room(struct bpf_stream_page *stream_page, int len)

WARNING: line length of 86 exceeds 80 columns
#421: FILE: kernel/bpf/stream.c:118:
+static struct bpf_stream_page *bpf_stream_page_from_elem(struct bpf_stream_elem *elem)

WARNING: line length of 102 exceeds 80 columns
#428: FILE: kernel/bpf/stream.c:125:
+static struct bpf_stream_elem *bpf_stream_page_push_elem(struct bpf_stream_page *stream_page, int len)

WARNING: line length of 89 exceeds 80 columns
#432: FILE: kernel/bpf/stream.c:129:
+	stream_page->consumed += round_up(offsetof(struct bpf_stream_elem, str[len]), 8);

ERROR: space required after that close brace '}'
#464: FILE: kernel/bpf/stream.c:161:
+	const int max_len = ARRAY_SIZE((struct bpf_bprintf_buffers){}.buf);

WARNING: line length of 85 exceeds 80 columns
#470: FILE: kernel/bpf/stream.c:167:
+	 * Length denotes the amount of data to be written as part of stream element,

WARNING: line length of 84 exceeds 80 columns
#471: FILE: kernel/bpf/stream.c:168:
+	 * thus includes '\0' byte. We're capped by how much bpf_bprintf_buffers can

WARNING: 'accomodate' may be misspelled - perhaps 'accommodate'?
#472: FILE: kernel/bpf/stream.c:169:
+	 * accomodate, therefore deny allocations that won't fit into them.
 	   ^^^^^^^^^^

WARNING: line length of 82 exceeds 80 columns
#484: FILE: kernel/bpf/stream.c:181:
+static int __bpf_stream_push_str(struct llist_head *log, const char *str, int len)

WARNING: line length of 83 exceeds 80 columns
#506: FILE: kernel/bpf/stream.c:203:
+	if (atomic_add_return(len, &stream->capacity) >= BPF_STREAM_MAX_CAPACITY) {

WARNING: line length of 96 exceeds 80 columns
#513: FILE: kernel/bpf/stream.c:210:
+static void bpf_stream_release_capacity(struct bpf_stream *stream, struct bpf_stream_elem *elem)

WARNING: line length of 83 exceeds 80 columns
#520: FILE: kernel/bpf/stream.c:217:
+static int bpf_stream_push_str(struct bpf_stream *stream, const char *str, int len)

WARNING: line length of 96 exceeds 80 columns
#527: FILE: kernel/bpf/stream.c:224:
+static struct bpf_stream *bpf_stream_get(enum bpf_stream_id stream_id, struct bpf_prog_aux *aux)

CHECK: multiple assignments should be avoided
#561: FILE: kernel/bpf/stream.c:258:
+		stream->backlog_head = stream->backlog_tail = NULL;

WARNING: void function return statements are not generally useful
#587: FILE: kernel/bpf/stream.c:284:
+	return;
+}

WARNING: line length of 104 exceeds 80 columns
#644: FILE: kernel/bpf/stream.c:341:
+int bpf_prog_stream_read(struct bpf_prog *prog, enum bpf_stream_id stream_id, void __user *buf, int len)

WARNING: line length of 119 exceeds 80 columns
#660: FILE: kernel/bpf/stream.c:357:
+__bpf_kfunc int bpf_stream_vprintk(int stream_id, const char *fmt__str, const void *args, u32 len__sz, void *aux__prog)

CHECK: multiple assignments should be avoided
#771: FILE: kernel/bpf/stream.c:468:
+	head = tail = list;

WARNING: line length of 85 exceeds 80 columns
#806: FILE: kernel/bpf/syscall.c:5955:
+	ret = bpf_prog_stream_read(prog, attr->prog_stream_read.stream_id, buf, len);

total: 1 errors, 21 warnings, 5 checks, 726 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 d589fc9e87a9 ("bpf: Introduce BPF standard streams") 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.