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| author | Paul Mackerras | 2018-02-13 05:45:21 +0100 |
|---|---|---|
| committer | Paul Mackerras | 2018-02-13 05:45:21 +0100 |
| commit | 6df3877fc962c2bb3d0438633dfd24a185af6838 (patch) | |
| tree | efa1b6112180182901a903945327ad636d5ab439 | |
| parent | KVM: PPC: Fix compile error that occurs when CONFIG_ALTIVEC=n (diff) | |
| download | kernel-qcow2-linux-6df3877fc962c2bb3d0438633dfd24a185af6838.tar.gz kernel-qcow2-linux-6df3877fc962c2bb3d0438633dfd24a185af6838.tar.xz kernel-qcow2-linux-6df3877fc962c2bb3d0438633dfd24a185af6838.zip | |
KVM: PPC: Book3S: Fix compile error that occurs with some gcc versions
Some versions of gcc generate a warning that the variable "emulated"
may be used uninitialized in function kvmppc_handle_load128_by2x64().
It would be used uninitialized if kvmppc_handle_load128_by2x64 was
ever called with vcpu->arch.mmio_vmx_copy_nums == 0, but neither of
the callers ever do that, so there is no actual bug. When gcc
generates a warning, it causes the build to fail because arch/powerpc
is compiled with -Werror.
This silences the warning by initializing "emulated" to EMULATE_DONE.
Fixes: 09f984961c13 ("KVM: PPC: Book3S: Add MMIO emulation for VMX instructions")
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 0083142c2f84..52c205373986 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -1345,7 +1345,7 @@ static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu, int kvmppc_handle_load128_by2x64(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int rt, int is_default_endian) { - enum emulation_result emulated; + enum emulation_result emulated = EMULATE_DONE; while (vcpu->arch.mmio_vmx_copy_nums) { emulated = __kvmppc_handle_load(run, vcpu, rt, 8, |