Bug 723318 – sys-kernel/gentoo-sources-5.6.13 kvm module build error (may be gcc10 related)

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Marcin Kowalski 2020-05-16 06:56:10 UTC]

CHK     kernel/kheaders_data.tar.xz
  CC [M]  arch/x86/kvm/svm.o
arch/x86/kvm/../../../virt/kvm/kvm_main.c: In function ‘__kvm_gfn_to_hva_cache_init’:
arch/x86/kvm/../../../virt/kvm/kvm_main.c:2236:42: error: ‘nr_pages_avail’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
 2236 |  for ( ; start_gfn <= end_gfn; start_gfn += nr_pages_avail) {
      |                                ~~~~~~~~~~^~~~~~~~~~~~~~~~~
  CC [M]  arch/x86/kvm/pmu_amd.o
cc1: all warnings being treated as errors



For reference : https://bugzilla.kernel.org/show_bug.cgi?id=207173

Reproducible: Always

[Comment 1 Marcin Kowalski 2020-05-16 06:57:48 UTC]

https://github.com/torvalds/linux/commit/78a5255ffb6a1af189a83e493d916ba1c54d8c75

proposed patch

[Comment 2 Mike Pagano 2020-05-21 19:31:49 UTC]

This patch is in 5.6.14
Gentoo and Vanilla