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lib: Improve the is_signed_type() kunit test 

Since the definition of is_signed_type() has been moved from
<linux/overflow.h> to <linux/compiler.h>, include the latter header file
instead of the former. Additionally, add a test for the type 'char'.

Cc: Isabella Basso <isabbasso@riseup.net>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220907180329.3825417-1-bvanassche@acm.org
This commit is contained in:
Bart Van Assche 2022-09-07 11:03:29 -07:00 committed by Kees Cook
parent 6e42aec7c7
commit 98388bda6a
1 changed files with 6 additions and 1 deletions
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7
lib/is_signed_type_kunit.c
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@ -5,7 +5,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <kunit/test.h>
#include <linux/overflow.h>
#include <linux/compiler.h>
enum unsigned_enum {
constant_a = 3,
@ -21,6 +21,11 @@ static void is_signed_type_test(struct kunit *test)
KUNIT_EXPECT_EQ(test, is_signed_type(bool), false);
KUNIT_EXPECT_EQ(test, is_signed_type(signed char), true);
KUNIT_EXPECT_EQ(test, is_signed_type(unsigned char), false);
#ifdef __CHAR_UNSIGNED__
KUNIT_EXPECT_EQ(test, is_signed_type(char), false);
#else
KUNIT_EXPECT_EQ(test, is_signed_type(char), true);
#endif
KUNIT_EXPECT_EQ(test, is_signed_type(int), true);
KUNIT_EXPECT_EQ(test, is_signed_type(unsigned int), false);
KUNIT_EXPECT_EQ(test, is_signed_type(long), true);