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selftests/net: Replace non-standard __WORDSIZE with sizeof(long) * 8

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The `__WORDSIZE` macro, defined in the non-standard `<bits/wordsize.h>`
header, is a GNU extension and not universally available with all
toolchains, such as Clang when used with musl libc.

This can lead to build failures in environments where this header is
missing.

The intention of the code is to determine the bit width of a C `long`.
Replace the non-portable `__WORDSIZE` with the standard and portable
`sizeof(long) * 8` expression to achieve the same result.

This change also removes the inclusion of the now-unused
`<bits/wordsize.h>` header.

Signed-off-by: Wake Liu <wakel@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Wake Liu 2025-08-07 16:09:32 +08:00 committed by Jakub Kicinski
parent 3781648824
commit c36748e873
1 changed files with 1 additions and 2 deletions
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3
tools/testing/selftests/net/psock_tpacket.c
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@ -33,7 +33,6 @@
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include <bits/wordsize.h>
#include <net/ethernet.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
@ -785,7 +784,7 @@ static int test_kernel_bit_width(void)
static int test_user_bit_width(void)
{
return __WORDSIZE;
return sizeof(long) * 8;
}
static const char *tpacket_str[] = {