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Date: Wed, 14 Oct 2026 15:43:52 +0200
From: "Joerg Roedel (AMD)" <joro@8bytes.org>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: iommu@lists.linux.dev, Robin Murphy <robin.murphy@arm.com>, 
	Will Deacon <will@kernel.org>, Alejandro Jimenez <alejandro.j.jimenez@oracle.com>, 
	Joerg Roedel <joerg.roedel@amd.com>, Kevin Tian <kevin.tian@intel.com>, 
	kernel test robot <lkp@intel.com>, Pasha Tatashin <pasha.tatashin@soleen.com>, 
	patches@lists.linux.dev
Subject: Re: [PATCH rc] iommupt/kunit: Use if_changed_rule for the kunit
Message-ID: <as-G_wceROT0osZz@8bytes.org>
References: <0-v1-fb494403c1bf+137f1-iommupt_kunit_kbuild_jgg@nvidia.com>
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In-Reply-To: <0-v1-fb494403c1bf+137f1-iommupt_kunit_kbuild_jgg@nvidia.com>

On Tue, Oct 13, 2026 at 10:13:30AM -0300, Jason Gunthorpe wrote:
> Use if_changed_rule so rule_cc_o_c runs cmd_save_c_flags for the kunit
> objects. Without the saved flags CONFIG_LTO_CLANG_THIN_DIST runs the
> ThinLTO backend with no --target and generates x86_64 code from arm64
> bitcode.
> 
> Fixes: 1dd4187f53c3 ("iommupt: Add a kunit test for Generic Page Table")
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202610110841.120JzAJG-lkp@intel.com/
> Assisted-by: LLM
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

Applied, thanks.