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Mon, 17 Feb 2025 11:52:40 +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 2q6iEAgjs2c/bQAAD6G6ig (envelope-from ); Mon, 17 Feb 2025 11:52:40 +0000 Message-ID: <469ee330-7736-4059-9e59-ec7b9a6d3c8b@suse.cz> Date: Mon, 17 Feb 2025 12:52:39 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v4 2/3] mm/mempolicy: export memory policy symbols Content-Language: en-US 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 References: <20250210063227.41125-1-shivankg@amd.com> <20250210063227.41125-3-shivankg@amd.com> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 4631E40018 X-Stat-Signature: tyr1r6yukjr4o3rq68dis6smq6p3ye18 X-Rspam-User: X-HE-Tag: 1739793163-948812 X-HE-Meta: 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 BqcAJP3W KZtuJC4we+c78GyXvS5xHJOnwnr5hBd3wSNsD6OYv4CBnjScJVV8ITsXL6HJO582HtdE9rZCBmBbLCzoCyY8PFRB8KjruvrJVvrpcmsuj6j+H7ojkURX1aERvXBmQGEfylY/1CWjne++1Nyz1/1N46dBO/OaUE/Y2m+Um03HQfvoZ6qw/9Zucfs8DVMRV6x71HQt5Y6tV0NATxHjSpoTlm6UJGO9ShoRkStQiDDbgXgP0aYwNpZLwz/CJzE9mVt38bfF4mJd0c9GvMzzpp49j85Kbreq08xiPYF4Z6X2n7WsPxAWch9TAr8sxQA== 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 2/10/25 07:32, Shivank Garg wrote: > Export memory policy related symbols needed by the KVM guest-memfd to > implement NUMA policy support. > > These symbols are required to implement per-memory region NUMA policies > for guest memory, allowing VMMs to control guest memory placement across > NUMA nodes. > > Signed-off-by: Shivank Garg I think we should use EXPORT_SYMBOL_GPL() these days. Wasn't there also some way to limit the exports to KVM? > --- > mm/mempolicy.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/mm/mempolicy.c b/mm/mempolicy.c > index bbaadbeeb291..9c15780cfa63 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(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(__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(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(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(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(mpol_free_shared_policy); > > #ifdef CONFIG_NUMA_BALANCING > static int __initdata numabalancing_override;