Public bug reported:
grep nv-interface.o -r .
./CLEAN:rm -f nvidia/nv-interface.o
./BUILD:/usr/bin/ld.bfd -r -o nvidia/nv-interface.o nvidia/nv.o nvidia/nv-pci.o
nvidia/nv-acpi.o nvidia/nv-cray.o nvidia/nv-dma.o nvidia/nv-i2c.o
nvidia/nv-mmap.o nvidia/nv-p2p.o nvidia/nv-pat.o nvidia/nv-procfs.o
nvidia/nv-procfs-utils.o nvidia/nv-usermap.o nvidia/nv-vm.o nvidia/nv-vtophys.o
nvidia/os-interface.o nvidia/os-mlock.o nvidia/os-pci.o nvidia/os-registry.o
nvidia/os-usermap.o nvidia/nv-modeset-interface.o nvidia/nv-pci-table.o
nvidia/nv-kthread-q.o nvidia/nv-memdbg.o nvidia/nv-ibmnpu.o
nvidia/nv-report-err.o nvidia/nv-rsync.o nvidia/nv-msi.o nvidia/nv-caps.o
nvidia/nv-frontend.o nvidia/nv_uvm_interface.o nvidia/nvlink_linux.o
nvidia/nvlink_caps.o nvidia/linux_nvswitch.o nvidia/procfs_nvswitch.o
nvidia/i2c_nvswitch.o
Note that nvidia/nv-interface.o is created, but not used by any modules.
In the kbuild we have:
#
# Build nv-interface.o from the kernel interface layer objects, suitable
# for further processing by the top-level makefile to produce a precompiled
# kernel interface file.
#
NVIDIA_INTERFACE := nvidia/nv-interface.o
# Linux kernel v5.12 and later looks at "always-y", Linux kernel versions
# before v5.6 looks at "always"; kernel versions between v5.12 and v5.6
# look at both.
always += $(NVIDIA_INTERFACE)
always-y += $(NVIDIA_INTERFACE)
$(obj)/$(NVIDIA_INTERFACE): $(addprefix $(obj)/,$(NVIDIA_OBJECTS))
$(LD) -r -o $@ $^
But i'm not sure if we actually do any further processing, or use
precompiled kernel interface file.
** Affects: linux-restricted-modules (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
grep nv-interface.o -r .
./CLEAN:rm -f nvidia/nv-interface.o
./BUILD:/usr/bin/ld.bfd -r -o nvidia/nv-interface.o nvidia/nv.o
nvidia/nv-pci.o nvidia/nv-acpi.o nvidia/nv-cray.o nvidia/nv-dma.o
nvidia/nv-i2c.o nvidia/nv-mmap.o nvidia/nv-p2p.o nvidia/nv-pat.o
nvidia/nv-procfs.o nvidia/nv-procfs-utils.o nvidia/nv-usermap.o nvidia/nv-vm.o
nvidia/nv-vtophys.o nvidia/os-interface.o nvidia/os-mlock.o nvidia/os-pci.o
nvidia/os-registry.o nvidia/os-usermap.o nvidia/nv-modeset-interface.o
nvidia/nv-pci-table.o nvidia/nv-kthread-q.o nvidia/nv-memdbg.o
nvidia/nv-ibmnpu.o nvidia/nv-report-err.o nvidia/nv-rsync.o nvidia/nv-msi.o
nvidia/nv-caps.o nvidia/nv-frontend.o nvidia/nv_uvm_interface.o
nvidia/nvlink_linux.o nvidia/nvlink_caps.o nvidia/linux_nvswitch.o
nvidia/procfs_nvswitch.o nvidia/i2c_nvswitch.o
Note that nvidia/nv-interface.o is created, but not used by any modules.
+
+ In the kbuild we have:
+
+ #
+ # Build nv-interface.o from the kernel interface layer objects, suitable
+ # for further processing by the top-level makefile to produce a precompiled
+ # kernel interface file.
+ #
+
+ NVIDIA_INTERFACE := nvidia/nv-interface.o
+
+ # Linux kernel v5.12 and later looks at "always-y", Linux kernel versions
+ # before v5.6 looks at "always"; kernel versions between v5.12 and v5.6
+ # look at both.
+
+ always += $(NVIDIA_INTERFACE)
+ always-y += $(NVIDIA_INTERFACE)
+
+ $(obj)/$(NVIDIA_INTERFACE): $(addprefix $(obj)/,$(NVIDIA_OBJECTS))
+ $(LD) -r -o $@ $^
+
+ But i'm not sure if we actually do any further processing, or use
+ precompiled kernel interface file.
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https://bugs.launchpad.net/bugs/1951862
Title:
nv-interface is linked but not needed
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