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kunit: Add gnu_printf specifiers

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Some KUnit functions use variable arguments to implement a printf-like
format string. Use the __printf() attribute to let the compiler warn if
invalid format strings are passed in.

If the kernel is build with W=1, it complained about the lack of these
specifiers, e.g.:
../lib/kunit/test.c:72:2: warning: function ‘kunit_log_append’ might be a candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]

Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Daniel Latypov <dlatypov@google.com>
Acked-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
David Gow 2021-05-13 13:03:50 -07:00 committed by Shuah Khan
parent 255ede3b12
commit 44acdbb250
2 changed files with 4 additions and 4 deletions
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2
include/kunit/test.h
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@ -610,7 +610,7 @@ static inline void *kunit_kzalloc(struct kunit *test, size_t size, gfp_t gfp)
void kunit_cleanup(struct kunit *test);
void kunit_log_append(char *log, const char *fmt, ...);
void __printf(2, 3) kunit_log_append(char *log, const char *fmt, ...);
/*
* printk and log to per-test or per-suite log buffer. Logging only done

6
lib/kunit/string-stream.h
View File

@ -35,9 +35,9 @@ struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp);
int __printf(2, 3) string_stream_add(struct string_stream *stream,
const char *fmt, ...);
int string_stream_vadd(struct string_stream *stream,
const char *fmt,
va_list args);
int __printf(2, 0) string_stream_vadd(struct string_stream *stream,
const char *fmt,
va_list args);
char *string_stream_get_string(struct string_stream *stream);