From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 27744485CEC; Tue, 1 Sep 2026 17:24:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788283456; cv=none; b=e+8svL02HNk28YiuVqRPbCApTaVwAKny3sruMBkpOfe4V39r+tY4Lr8jzpv8rsNWGd13aAQnhz+wJvlK50npf12y6NAYmU+iGNDIySm2MxozywAMSTbymQ0Md7c1BXNchEH0HhOxfsq6ANDQzDZRaKkku0WBK4Zp75fP43CRfFE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788283456; c=relaxed/simple; bh=UY6btghwQtIwfJk0bmCNskL778LtGOfFmqSp3uBvIRA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=l+lf555guxLTeuyxQ1hpTJRXdu/4b5vFab06rzhmEYCgme4+npSTg7IU96cXu8s57ELNzAAupxLK/e3rJMfnSzcrm1acwGvKvt/5I33093suyoJ4y02LVxFUoi0sj/KXmj9R6XmpFAJ0xbxhsUtIf6GQe8KoOFZDN2oZOIpvjrI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WTo6UkzH; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WTo6UkzH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4DA491F000E9; Tue, 1 Sep 2026 17:24:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788283454; bh=EL0Xo+Mhydk52yGAHcNqYMVa9Cn0eSVqA82Qi453s+I=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=WTo6UkzHgw76FyrAZXps+cxxRQdHRvjH9pz5rD+x+iUEvbuHYaDe/ksJCW5GvY6Jg JaZdXgg9tBq9f4KY+EH4U9Nwbo/CWlUdSctATAq5h3/12sj6oYmvMYipVuYsO98zji BI2RPNFtIYc2LA21ZFKYBQPKyGnZx6M2DR/icKUAb1VrzzJSAJeSRiPqPxJB+p6oXz N0OLj6KHgk1Hupco2E4Sd4pSgBeNPOnCoxCtRNE7Ds9D2g9ry7KryMs9q7OHUTihfM 9uXHUVizu23JZBwiRzllsykRaR9QLgIJ9MV4LBFAUtxvfOnSZ77Gbps1gGqTLVmdZ5 jCGnAHKrc2y9g== Message-ID: Date: Tue, 1 Sep 2026 19:24:07 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Subject: Re: [PATCH net-next 2/2] selftests: drv-net: Use cross-compilation environment for the io_uring check Content-Language: fr To: "Maxime Chevallier (Netdev Foundation)" Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, linux-kselftest@vger.kernel.org, Andrew Lunn , davem@davemloft.net, Eric Dumazet , Jakub Kicinski , Paolo Abeni , Donald Hunter , Simon Horman , Shuah Khan , Stanislav Fomichev References: <20260901164200.1124343-1-maxime.chevallier@bootlin.com> <20260901164200.1124343-3-maxime.chevallier@bootlin.com> From: Matthieu Baerts Autocrypt: addr=matttbe@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Maxime, Thank you for looking at that. On 01/09/2026 18:41, Maxime Chevallier (Netdev Foundation) wrote: > To test for the presence of zerocopy support in the available liburing, > a small check program is compiled. > > The CC value used for the io_uring library check defaults to the host > compiler, which will fail in cross-compiling environments. > > Normally the CC for cross-compile is set in lib.mk, but this also > requires the test list to be set when we include it, and this check > needs to run first. > > Note that this doesn't cover the LLVM cross-compiling case though. Maybe it is enough to just check if LLVM is set? > Signed-off-by: Maxime Chevallier (Netdev Foundation) > --- > tools/testing/selftests/drivers/net/hw/Makefile | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/tools/testing/selftests/drivers/net/hw/Makefile b/tools/testing/selftests/drivers/net/hw/Makefile > index 78bb0169350b..0ebb4767cd57 100644 > --- a/tools/testing/selftests/drivers/net/hw/Makefile > +++ b/tools/testing/selftests/drivers/net/hw/Makefile > @@ -1,5 +1,8 @@ > # SPDX-License-Identifier: GPL-2.0+ OR MIT > > +# Set CC for the io_uring check > +CC := $(CROSS_COMPILE)gcc Could we have something similar to tools/testing/selftests/riscv/cfi/Makefile: # Set CC for the io_uring check done before including lib.mk ifeq ($(LLVM)$(CC),cc) CC := $(CROSS_COMPILE)gcc endif WDYT? But that's possibly not needed for this simple check? I guess if gcc can find liburing.h, clang should look at the same places. > # Check if io_uring supports zero-copy receive > HAS_IOURING_ZCRX := $(shell \ > echo -e '#include \n' \ Cheers, Matt