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Wed, 26 Feb 2025 13:57:46 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id inElFtodv2drOQAAD6G6ig (envelope-from ); Wed, 26 Feb 2025 13:57:46 +0000 Message-ID: <6e9d4d95-a132-46a0-89c3-e39ace6bcb2a@suse.cz> Date: Wed, 26 Feb 2025 14:59:29 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 2/5] mm/mempolicy: export memory policy symbols To: Shivank Garg , akpm@linux-foundation.org, willy@infradead.org, pbonzini@redhat.com Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev, chao.gao@intel.com, seanjc@google.com, ackerleytng@google.com, david@redhat.com, bharata@amd.com, nikunj@amd.com, michael.day@amd.com, Neeraj.Upadhyay@amd.com, thomas.lendacky@amd.com, michael.roth@amd.com, tabba@google.com References: <20250226082549.6034-1-shivankg@amd.com> <20250226082549.6034-3-shivankg@amd.com> From: Vlastimil Babka Content-Language: en-US In-Reply-To: <20250226082549.6034-3-shivankg@amd.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 7926C1C0002 X-Stat-Signature: dtcokgu7unpzhejzaqbgmo6sp9rk3m11 X-HE-Tag: 1740578268-370084 X-HE-Meta: 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 OFBDtb0+ EJhWcWypgrM2ds72HTY92Nn9atwfhZbbYQ0POOuNJ/WHDPHXjc9EJ3hEVgmVCwBxOI6THPStZgtRBLDic9isZX5NSggOnpLfev3qApmhAhNb0ar/NKjkmTGnzuOq9TqTj4ctsgXKYq0ae4RURrGmtS2f2GieS7L0g98LLroFpo26Jv2HAA2z/fhThMHvDXd6GSh1UpoJyoT0RohwR+KXw2TDpeb/SdKlnLjy4Ui68Z8rRKjj8zQdF9V0cWk6yD1yM3WfU6iAPrPQHyWxXC+dMCnY3apUDhdFabzvh7o2aN7AYlbfqYJNhBORpNS37t0W7btMjyCc5LwYQANHkCYvUkMYMCQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2/26/25 9:25 AM, Shivank Garg wrote: > 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 > Signed-off-by: Shivank Garg Acked-by: Vlastimil Babka > --- > mm/mempolicy.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/mm/mempolicy.c b/mm/mempolicy.c > index bbaadbeeb291..d9c5dcdadcd0 100644 > --- a/mm/mempolicy.c > +++ b/mm/mempolicy.c > @@ -214,6 +214,7 @@ struct mempolicy *get_task_policy(struct task_struct *p) > > return &default_policy; > } > +EXPORT_SYMBOL_GPL(get_task_policy); > > static const struct mempolicy_operations { > int (*create)(struct mempolicy *pol, const nodemask_t *nodes); > @@ -347,6 +348,7 @@ void __mpol_put(struct mempolicy *pol) > return; > kmem_cache_free(policy_cache, pol); > } > +EXPORT_SYMBOL_GPL(__mpol_put); > > static void mpol_rebind_default(struct mempolicy *pol, const nodemask_t *nodes) > { > @@ -2736,6 +2738,7 @@ struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp, > read_unlock(&sp->lock); > return pol; > } > +EXPORT_SYMBOL_GPL(mpol_shared_policy_lookup); > > static void sp_free(struct sp_node *n) > { > @@ -3021,6 +3024,7 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) > mpol_put(mpol); /* drop our incoming ref on sb mpol */ > } > } > +EXPORT_SYMBOL_GPL(mpol_shared_policy_init); > > int mpol_set_shared_policy(struct shared_policy *sp, > struct vm_area_struct *vma, struct mempolicy *pol) > @@ -3039,6 +3043,7 @@ int mpol_set_shared_policy(struct shared_policy *sp, > sp_free(new); > return err; > } > +EXPORT_SYMBOL_GPL(mpol_set_shared_policy); > > /* Free a backing policy store on inode delete. */ > void mpol_free_shared_policy(struct shared_policy *sp) > @@ -3057,6 +3062,7 @@ void mpol_free_shared_policy(struct shared_policy *sp) > } > write_unlock(&sp->lock); > } > +EXPORT_SYMBOL_GPL(mpol_free_shared_policy); > > #ifdef CONFIG_NUMA_BALANCING > static int __initdata numabalancing_override;