diff options
Diffstat (limited to 'target/linux/generic/patches-3.8/031-PCI-Remove-__weak-annotation-from-pcibios_get_phb_of.patch')
-rw-r--r-- | target/linux/generic/patches-3.8/031-PCI-Remove-__weak-annotation-from-pcibios_get_phb_of.patch | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.8/031-PCI-Remove-__weak-annotation-from-pcibios_get_phb_of.patch b/target/linux/generic/patches-3.8/031-PCI-Remove-__weak-annotation-from-pcibios_get_phb_of.patch new file mode 100644 index 0000000000..ed9777683a --- /dev/null +++ b/target/linux/generic/patches-3.8/031-PCI-Remove-__weak-annotation-from-pcibios_get_phb_of.patch @@ -0,0 +1,40 @@ +From 10629d711ed780470937ecda50d9ffa0e925a4ee Mon Sep 17 00:00:00 2001 +From: Bjorn Helgaas <bhelgaas@google.com> +Date: Wed, 10 Apr 2013 09:56:54 -0600 +Subject: [PATCH 1/2] PCI: Remove __weak annotation from + pcibios_get_phb_of_node decl + +The __weak annotation on the pcibios_get_phb_of_node() declaration +causes *every* definition to be marked "weak." The linker then +selects one based on link order, which may be the wrong one. + +Gabor found that on MIPS, the linker selected the generic implementation +from drivers/pci even though arch/mips supplied a definition without the +__weak annotation: + +$ mipsel-openwrt-linux-readelf -s arch/mips/pci/built-in.o \ + drivers/pci/built-in.o vmlinux.o | grep pcibios_get_phb_of_node + 86: 0000046c 12 FUNC WEAK DEFAULT 2 pcibios_get_phb_of_node + 1430: 00012e2c 104 FUNC WEAK DEFAULT 2 pcibios_get_phb_of_node + 31898: 0017e4ec 104 FUNC WEAK DEFAULT 2 pcibios_get_phb_of_node + +This removes the __weak annotation from the pcibios_get_phb_of_node() +declaration so arch-specific non-weak implementations work reliably. + +Suggested-by: Gabor Juhos <juhosg@openwrt.org> +Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> +--- + include/linux/pci.h | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/include/linux/pci.h ++++ b/include/linux/pci.h +@@ -1803,7 +1803,7 @@ extern void pci_set_bus_of_node(struct p + extern void pci_release_bus_of_node(struct pci_bus *bus); + + /* Arch may override this (weak) */ +-extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus); ++extern struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus); + + static inline struct device_node * + pci_device_to_OF_node(const struct pci_dev *pdev) |