Hi Marc, On Sat, Jul 6, 2013 at 8:07 AM, Marc Gauthier <Marc.Gauthier@xxxxxxxxxxxxx> wrote: > Geert Uytterhoeven wrote: >> On Tue, Jul 2, 2013 at 8:34 PM, Bjorn Helgaas >> <bhelgaas@xxxxxxxxxx> wrote: >> >> + warning: vmlinux.o(.text+0x1ad7a4): Section mismatch >> in reference from the function pwmchip_add() to the function >> .init.text:pcibios_fixup_bus(): => N/A >> >> + warning: vmlinux.o(.text+0x1b18d8): Section mismatch >> in reference from the function pci_scan_child_bus() to the >> function .init.text:pcibios_fixup_bus(): => N/A Bjorn: both warnings went away after your patch (http://permalink.gmane.org/gmane.linux.kernel.pci/23678). Thanks! >> > I understand the second warning, but not the first (reference from >> > pwmchip_add() to pcibios_fixup_bus()). I don't think pwmchip_add() >> > calls pcibios_fixup_bus(). Is the pwmchip_chip() function name >> > inexact, or is there some other problem here? >> >> Indeed, that's weird. >> >> This happened with xtensa-allmodconfig. >> I compiled my own xtensa-allmodconfig kernel, and it happens >> there, too. >> >> If I'm not mistaken, the hex address between parentheses should match >> the "from" function, right? >> After disassembly ("xtensa-linux-objdump -D vmlinux"), the addresses >> didn't seem to match the function names at all. >> So it may be an issue with the toolchain? > > The Xtensa linker, by default, does some code shrinkage > (some of the "relaxations") after applying relocations, > causing code to move around. This can sometimes cause > error/warning messages to use incorrect addresses. > (Not trivial to fix in the linker.) > > There's a config option LD_NO_RELAX to disable linker > relaxation. If using this option fixes the names, it > may be this issue. This was allmodconfig, so CONFIG_LD_NO_RELAX was set. After disabling it, it fails with: net/built-in.o: In function `net_rx_action': net/core/dev.c:4194:(.text+0x11b91): dangerous relocation: call8: misaligned call target: (.text.unlikely+0x47) net/built-in.o: In function `raw_seqcount_begin': include/linux/seqlock.h:106:(.text+0x132be): dangerous relocation: call8: misaligned call target: (.text.unlikely+0x47) Similar to the defconfig on http://kisskb.ellerman.id.au/kisskb/buildresult/9070101/. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
