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Sat, 11 Apr 2026 08:02:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775894548; bh=z/qUE/WCrDQr3RvpHa7YYVIuPRUsL1w2bKCzec+b0mY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EVOHS41HZ7O7pGPF9br8SY1u7sHcyqrpjKdi/qFbedrMDNdsefupHlKuvayTRXp2P 9CKxMY7yNwr7P4gtKaVpTsrfZqcqfQZut6uVBxEDOfWtox0qPo/jvefLb0Wl4+XbHW v1rCyjfQsqsGW/wnS+lTpTEudhdPgGlhaOLjzuP3gZxmotOyQ0QrWIZjF6a1rjt4l1 9OuTnEN+bDhZfhG2CDDwzMOuOQocZBhTFzCYmadriPBC2Eg3sUm8DsqbF6t12bUaxu OvL+CxxTZjB4wgimS3tRHbg0z33RLpZe52g0fCkFW3903L2ztkBnOcN4kMd61rFwZF vEHFsBQjsLAhA== From: =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= To: Bjorn Helgaas Cc: Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Magnus Lindholm , Matt Turner , Richard Henderson , Christophe Leroy , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Dexuan Cui , =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= , Lukas Wunner , "Oliver O'Halloran" , Saurabh Singh Sengar , Shuan He , Srivatsa Bhat , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v4 10/24] PCI/sysfs: Limit pci_sysfs_init() late_initcall compile scope Date: Sat, 11 Apr 2026 08:01:34 +0000 Message-ID: <20260411080148.471335-11-kwilczynski@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260411080148.471335-1-kwilczynski@kernel.org> References: <20260411080148.471335-1-kwilczynski@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently, pci_sysfs_init() and sysfs_initialized compile unconditionally, even on platforms where static attribute groups handle all resource file creation. Thus, place them behind a new HAVE_PCI_SYSFS_INIT macro, especially as the late_initcall is only needed when: - HAVE_PCI_LEGACY is set, to iterate buses and create legacy I/O and memory files. - Neither HAVE_PCI_MMAP nor ARCH_GENERIC_PCI_MMAP_RESOURCE is set, to iterate devices and create resource files via the __weak pci_create_resource_files() stub override (this is how the Alpha architecture handles this currently). On most systems both conditions are false and the entire late_initcall compiles away. Signed-off-by: Krzysztof Wilczyński --- drivers/pci/pci-sysfs.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 517efb6d71cc..d22bc5c48bc0 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -37,7 +37,14 @@ #define ARCH_PCI_DEV_GROUPS #endif +#if defined(HAVE_PCI_LEGACY) || \ + !defined(HAVE_PCI_MMAP) && !defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) +#define HAVE_PCI_SYSFS_INIT +#endif + +#ifdef HAVE_PCI_SYSFS_INIT static int sysfs_initialized; /* = 0 */ +#endif /* show configuration fields */ #define pci_config_attr(field, format_string) \ @@ -1792,6 +1799,7 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev) } #endif +#ifdef HAVE_PCI_SYSFS_INIT static int __init pci_sysfs_init(void) { #if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) @@ -1818,6 +1826,7 @@ static int __init pci_sysfs_init(void) return 0; } late_initcall(pci_sysfs_init); +#endif static struct attribute *pci_dev_dev_attrs[] = { &dev_attr_boot_vga.attr, -- 2.53.0