linux-kernel - [PATCH v2 08/10] selftests/nolibc: avoid sign-compare warnings

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Date:   Tue,  1 Aug 2023 13:48:19 +0800
From:   Zhangjin Wu <falcon@...ylab.org>
To:     linux@...ssschuh.net
Cc:     falcon@...ylab.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, shuah@...nel.org,
        tanyuan@...ylab.org, w@....eu
Subject: [PATCH v2 08/10] selftests/nolibc: avoid sign-compare warnings

Hi, Thomas

> These warnings will be enabled later so avoid triggering them.
> 
> Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
> ---
>  tools/testing/selftests/nolibc/nolibc-test.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
> index cb17cccd0bc7..82714051c72f 100644
> --- a/tools/testing/selftests/nolibc/nolibc-test.c
> +++ b/tools/testing/selftests/nolibc/nolibc-test.c
> @@ -749,7 +749,7 @@ static int test_mmap_munmap(void)
>  	};
>  
>  	page_size = getpagesize();
> -	if (page_size < 0)
> +	if (page_size == 0)
>  		return -1;
>

It was my mistake before, but do we need to align with the one used in
test_getpagesize():

    static int test_getpagesize(void)
    {
            long x = getpagesize();
            int c;
    
            if (x < 0)
                    return x;

Use 'long' instead of 'size_t' to declare page_size?

Thanks,
Zhangjin

>  	/* find a right file to mmap, existed and accessible */
> @@ -998,7 +998,7 @@ static int run_stdlib(int min, int max)
>  #define EXPECT_VFPRINTF(c, expected, fmt, ...)				\
>  	ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__)
>  
> -static int expect_vfprintf(int llen, size_t c, const char *expected, const char *fmt, ...)
> +static int expect_vfprintf(int llen, int c, const char *expected, const char *fmt, ...)
>  {
>  	int ret, fd, w, r;
>  	char buf[100];
> 
> -- 
> 2.41.0