KVM: PPC: Book3S HV: radix: Fix uninitialized var build error

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Old GCCs (4.6.3 at least), aren't able to follow the logic in
__kvmhv_copy_tofrom_guest_radix() and warn that old_pid is used
uninitialized:

  arch/powerpc/kvm/book3s_64_mmu_radix.c:75:3: error: 'old_pid' may be
  used uninitialized in this function

The logic is OK, we only use old_pid if quadrant == 1, and in that
case it has definitely be initialised, eg:

	if (quadrant == 1) {
		old_pid = mfspr(SPRN_PID);
	...
	if (quadrant == 1 && pid != old_pid)
		mtspr(SPRN_PID, old_pid);

Annotate it to fix the error.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

...

This commit is contained in:

Michael Ellerman 2018-12-30 14:05:13 +11:00

parent 42aee37298

commit f460772291

1 changed files with 1 additions and 1 deletions

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arch/powerpc/kvm/book3s_64_mmu_radix.c

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