From: Alessandro Carminati (Red Hat) <alessandro.carminati@xxxxxxxxx> Date: Mon, 28 Aug 2023 08:04:23 +0000 > From: Alessandro Carminati <alessandro.carminati@xxxxxxxxx> > > It is not uncommon for drivers or modules related to similar peripherals > to have symbols with the exact same name. [...] > Changes from v2: > - Alias tags are created by querying DWARF information from the vmlinux. > - The filename + line number is normalized and appended to the original name. > - The tag begins with '@' to indicate the symbol source. > - Not a change, but worth mentioning, since the alias is added to the existing > list, the old duplicated name is preserved, and the livepatch way of dealing > with duplicates is maintained. > - Acknowledging the existence of scenarios where inlined functions declared in > header files may result in multiple copies due to compiler behavior, though > it is not actionable as it does not pose an operational issue. > - Highlighting a single exception where the same name refers to different > functions: the case of "compat_binfmt_elf.c," which directly includes > "binfmt_elf.c" producing identical function copies in two separate > modules. Oh, I thought you managed to handle this in v3 since you didn't reply in the previous thread... > > sample from new v3 > > ~ # cat /proc/kallsyms | grep gic_mask_irq > ffffd0b03c04dae4 t gic_mask_irq > ffffd0b03c04dae4 t gic_mask_irq@_drivers_irqchip_irq-gic_c_167 > ffffd0b03c050960 t gic_mask_irq > ffffd0b03c050960 t gic_mask_irq@_drivers_irqchip_irq-gic-v3_c_404 BTW, why normalize them? Why not just gic_mask_irq@drivers/irqchip/... Aaaaand why line number? Line numbers break reproducible builds and also would make it harder to refer to a particular symbol by its path and name since we also have to pass its line number which may change once you add a debug print there, for example. OTOH there can't be 2 symbols with the same name within one file, so just path + name would be enough. Or not? (sorry if some of this was already discussed previously) [...] Thanks, Olek
