KVM guest_memfd wants to implement support for NUMA policies just like shmem already does using the shared policy infrastructure. As guest_memfd currently resides in KVM module code, we have to export the relevant symbols.
In the future, guest_memfd might be moved to core-mm, at which point the symbols no longer would have to be exported. When/if that happens is still unclear.
Acked-by: David Hildenbrand david@redhat.com Acked-by: Vlastimil Babka vbabka@suse.cz Signed-off-by: Shivank Garg shivankg@amd.com --- mm/mempolicy.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index eb83cff7db8c..3d797d47a040 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -354,6 +354,7 @@ struct mempolicy *get_task_policy(struct task_struct *p)
return &default_policy; } +EXPORT_SYMBOL_FOR_MODULES(get_task_policy, "kvm");
static const struct mempolicy_operations { int (*create)(struct mempolicy *pol, const nodemask_t *nodes); @@ -487,6 +488,7 @@ void __mpol_put(struct mempolicy *pol) return; kmem_cache_free(policy_cache, pol); } +EXPORT_SYMBOL_FOR_MODULES(__mpol_put, "kvm");
static void mpol_rebind_default(struct mempolicy *pol, const nodemask_t *nodes) { @@ -2885,6 +2887,7 @@ struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp, read_unlock(&sp->lock); return pol; } +EXPORT_SYMBOL_FOR_MODULES(mpol_shared_policy_lookup, "kvm");
static void sp_free(struct sp_node *n) { @@ -3170,6 +3173,7 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) mpol_put(mpol); /* drop our incoming ref on sb mpol */ } } +EXPORT_SYMBOL_FOR_MODULES(mpol_shared_policy_init, "kvm");
int mpol_set_shared_policy(struct shared_policy *sp, struct vm_area_struct *vma, struct mempolicy *pol) @@ -3188,6 +3192,7 @@ int mpol_set_shared_policy(struct shared_policy *sp, sp_free(new); return err; } +EXPORT_SYMBOL_FOR_MODULES(mpol_set_shared_policy, "kvm");
/* Free a backing policy store on inode delete. */ void mpol_free_shared_policy(struct shared_policy *sp) @@ -3206,6 +3211,7 @@ void mpol_free_shared_policy(struct shared_policy *sp) } write_unlock(&sp->lock); } +EXPORT_SYMBOL_FOR_MODULES(mpol_free_shared_policy, "kvm");
#ifdef CONFIG_NUMA_BALANCING static int __initdata numabalancing_override;