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([2001:8b0:aba:5f3c:47e1:ee11:154c:e6b3]) by smtp.gmail.com with ESMTPSA id bq1-20020a5d5a01000000b0033b684d6d5csm910152wrb.20.2024.02.09.09.36.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Feb 2024 09:36:26 -0800 (PST) Message-ID: <73130ae89b57e6af9749dbead7dc3f42894e04e7.camel@linuxfoundation.org> Subject: Re: [OE-core][PATCH v5] kernel.bbclass: make do_symlink_kernelsrc reentrant From: Richard Purdie To: ecordonnier@snap.com, openembedded-core@lists.openembedded.org Cc: Bruce Ashfield Date: Fri, 09 Feb 2024 17:36:25 +0000 In-Reply-To: References: Autocrypt: addr=richard.purdie@linuxfoundation.org; prefer-encrypt=mutual; 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YNvg== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.0-1 MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Fri, 09 Feb 2024 17:36:37 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/195238 On Thu, 2023-12-21 at 22:49 +0100, Etienne Cordonnier via lists.openembedded.org wrote: > From: Etienne Cordonnier >=20 > The function do_symlink_kernsrc is not reentrant in the case where S is d= efined > to a non-default value. This causes build-failures e.g. when building lin= ux-yocto, then updating > poky to a commit which modifies kernel.bbclass, and then building linux-y= octo again. >=20 > Bugzilla: https://bugzilla.yoctoproject.org/show_bug.cgi?id=3D15325 >=20 > Tested with a recipe "my-custom-linux" which unpacks sources to a custom = ${S} directory > and ran symlink_kernsrc several times: > $ bitbake -f -c symlink_kernsrc my-custom-linux Sorry for the delay in getting back to review this patch. I'm extremely worried about adding complexity into this function, particularly as that complexity is now adding in significant overhead. Firstly, can I ask why you're using a non-default directory for ${S}? Is this as a way of doing a kind of external source usage? Having spent time looking at what this code is doing, in normal usage, S gets set to STAGING_KERNEL_DIR, the source is unpacked there and none of this code triggers. For EXTERNALSRC, a symlink is put in place. The code should remove a symlink if present and create it with the current setup. In that sense, this patch isn't doing the right thing. I'm very tempted to say the "using a non default S value" just error out. Whilst I understand how we got to this level of complexity, I think it will just end up causing us pain in the long run and I'd rather just not support it. Cheers, Richard