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| author |   Wanpeng Li <wanpengli@tencent.com> | 2018-03-24 21:17:24 -0700 |
|---|---|---|
| committer |   Radim Krčmář <rkrcmar@redhat.com> | 2018-03-28 22:47:06 +0200 |
| commit | 34226b6b70980a8f81fff3c09a2c889f77edeeff (patch) | |
| tree | 7cfc7a30d9fb250150ec97697cfab186f8fb5f5e /drivers/hv | |
| parent | tools/kvm_stat: Remove unused function (diff) | |
| download | linux-dev-34226b6b70980a8f81fff3c09a2c889f77edeeff.tar.xz linux-dev-34226b6b70980a8f81fff3c09a2c889f77edeeff.zip | |
KVM: X86: Fix setup the virt_spin_lock_key before static key get initialized
static_key_disable_cpuslocked(): static key 'virt_spin_lock_key+0x0/0x20' used before call to jump_label_init()
WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:161 static_key_disable_cpuslocked+0x61/0x80
RIP: 0010:static_key_disable_cpuslocked+0x61/0x80
Call Trace:
static_key_disable+0x16/0x20
start_kernel+0x192/0x4b3
secondary_startup_64+0xa5/0xb0
Qspinlock will be choosed when dedicated pCPUs are available, however, the
static virt_spin_lock_key is set in kvm_spinlock_init() before jump_label_init()
has been called, which will result in a WARN(). This patch fixes it by delaying
the virt_spin_lock_key setup to .smp_prepare_cpus().
Reported-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Fixes: b2798ba0b876 ("KVM: X86: Choose qspinlock when dedicated physical CPUs are available")
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'drivers/hv')
0 files changed, 0 insertions, 0 deletions