Commit 6ade8694 authored Apr 20, 2017 by Paul E. McKenney

kvm: Move srcu_struct fields to end of struct kvm



Parallelizing SRCU callback handling will increase the size of
srcu_struct, which will move the kvm structure's kvm_arch field out
of reach of powerpc's current assembly code, which will result in the
following sort of build error:

arch/powerpc/kvm/book3s_hv_rmhandlers.S:617: Error: operand out of range (0x000000000000b328 is not between 0xffffffffffff8000 and 0x0000000000007fff)

This commit moves the srcu_struct fields in the kvm structure to follow
the kvm_arch field, which will allow powerpc's assembly code to continue
to be able to reach the kvm_arch field.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: Michael Ellerman <michaele@au1.ibm.com>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
[ paulmck: Moved this commit to precede SRCU callback parallelization,
  and reworded the commit log into future tense, all in the name of
  bisectability. ]

parent dad81a20

include/linux/kvm_host.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -375,8 +375,6 @@ struct kvm {
		struct mutex slots_lock;
		struct mm_struct mm; / userspace tied to this vm */
		struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
		struct srcu_struct srcu;
		struct srcu_struct irq_srcu;
		struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];

		/*
		@@ -429,6 +427,8 @@ struct kvm {
		struct list_head devices;
		struct dentry *debugfs_dentry;
		struct kvm_stat_data **debugfs_stat_data;
		struct srcu_struct srcu;
		struct srcu_struct irq_srcu;
		};

		#define kvm_err(fmt, ...) \

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