WARNING: line length of 85 exceeds 80 columns
#138: FILE: include/linux/bpf.h:1559:
+	struct llist_head log;	/* list of in-flight stream elements in LIFO order */

WARNING: line length of 94 exceeds 80 columns
#141: FILE: include/linux/bpf.h:1562:
+	struct llist_node *backlog_head; /* list of in-flight stream elements in FIFO order */

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

WARNING: line length of 105 exceeds 80 columns
#179: FILE: include/linux/bpf.h:3614:
+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
#189: FILE: include/linux/bpf.h:3624:
+#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
#191: FILE: include/linux/bpf.h:3626:
+#define bpf_stream_stage(ss, prog, stream_id, expr)                      \
+	({                                                               \
+		if (!bpf_prog_stream_error_limit(prog)) {                \
+			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?
#308: 
new file mode 100644

WARNING: line length of 86 exceeds 80 columns
#350: 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
#410: 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
#430: 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
#437: 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
#441: 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 '}'
#473: 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
#479: 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
#480: 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'?
#481: FILE: kernel/bpf/stream.c:169:
+	 * accomodate, therefore deny allocations that won't fit into them.
 	   ^^^^^^^^^^

WARNING: line length of 82 exceeds 80 columns
#493: 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
#515: 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
#522: 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
#529: 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
#536: 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
#570: FILE: kernel/bpf/stream.c:258:
+		stream->backlog_head = stream->backlog_tail = NULL;

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

WARNING: line length of 104 exceeds 80 columns
#653: 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
#669: 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)

WARNING: line length of 82 exceeds 80 columns
#695: FILE: kernel/bpf/stream.c:383:
+	/* If the string was truncated, we only wrote until the size of buffer. */

WARNING: line length of 82 exceeds 80 columns
#758: FILE: kernel/bpf/stream.c:446:
+	/* If the string was truncated, we only wrote until the size of buffer. */

CHECK: multiple assignments should be avoided
#782: FILE: kernel/bpf/stream.c:470:
+	head = tail = list;

WARNING: line length of 94 exceeds 80 columns
#796: FILE: kernel/bpf/stream.c:484:
+	return atomic_fetch_add(1, &prog->aux->stream_error_cnt) >= BPF_PROG_STREAM_ERROR_CNT;

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

total: 1 errors, 24 warnings, 5 checks, 741 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 71195007ac9a ("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.