On Mon, Nov 07, 2016 at 02:10:12PM -0500, Vince Weaver wrote: > On Thu, 27 Oct 2016, Peter Wu wrote: > > > I can confirm Olivers issue, the current mainline kernel fails to boot > > on kernels with CONFIG_MODVERSIONS=y. Bisection points to: > > > > commit 784d5699eddc55878627da20d3fe0c8542e2f1a2 > > Author: Al Viro <v...@zeniv.linux.org.uk> > > Date: Mon Jan 11 11:04:34 2016 -0500 > > > WARNING: "memset" [sound/usb/snd-usbmidi-lib.ko] has no CRC! > > > WARNING: "__fentry__" [sound/usb/snd-usbmidi-lib.ko] has no CRC! > > > WARNING: "memcpy" [sound/usb/snd-usbmidi-lib.ko] has no CRC! > > > WARNING: "__sw_hweight32" [sound/usb/snd-usbmidi-lib.ko] has no CRC! > > Has any progress been made with this problem? > > I'm also encountering it on my debian-unstable box on any kernel more > recent than 4.9-rc1 (up to and including 4.9-rc4). I am glad someone > managed to isolate it as I was unable to get a clean bisect. > > Vince
The original kbuild issue went in via merge commit 84d69848c97faab0c25aa2667b273404d2e2a64a which notes: - EXPORT_SYMBOL for asm source by Al Viro. This does bring a regression, because genksyms no longer generates checksums for these symbols (CONFIG_MODVERSIONS). Nick Piggin is working on a patch to fix this. Plus, we are talking about functions like strcpy(), which rarely change prototypes. Adding Nicholas in the cc, hopefully he can give a status update. Kind regards, Peter
