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charset=UTF-8 X-Original-From: Li Zhe X-Stat-Signature: 4tdzeix8uqed9nmttrz3963mu66htp49 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 8A66F1C000B X-Rspam-User: X-HE-Tag: 1767785640-262766 X-HE-Meta: U2FsdGVkX19JPN5dWNan8fZ1Q9NSOLfvLt1yst5tV6DM5pfmXLDnE0dYCFh+8vjoRodR9BXTFn76iGyPO8uoi/goYmLW4UZ+j1r0uiNIFBOCmzm/WqIBZgH1A8bX1aPyafScxXFySB2yMxZ7jmDhSnxnLwT8sXs4TzUwc6xh7yOGv+18xsWd4solRsXSE+MfRn69rjc/cn8I3SmvpaMGESx2rZK719YHtfsGupT4LoKy0YDc9jQdBpx2Rnc7VMbPR5n00R9YA0tZLXlcqcgrm5qFqXEfhOQBr2F2rt9bB3y5SIEQ7hBsqI4tm37WEToNGE9cIdBS005kLrMdoT/Iw8Ta+Ibu/6BSuKmaWob533jzdQ1nJ6RQA+hyHYRGzlEWJrcm+l2apTwGVyXXaTS2b5ECLmudAa9O5iTrYoIkLvKuYjx6SxzxfQCWRqnz3tP2ENZY57oxmvydYzaEWZRuOxK5YK8sfcVR/j9YuxGrU/PrJ2hC6f+0P42097MHV0so4XmfP0eVIlAXcwJhx9ScW/ONo7FJxuAMD8v25a9zSoupxvVxUsrRGv/5LTXjZwxZ02mxOQvq/6IpStpN8j32vg0B1JPiHdusExKTWY7TuKtBZ2hEdxYWZeB84WBDixhwHkev0in5rvwI89lO/0szt+DFh8elfRZFdS2z3eDANM3ZmNfcQxMMWnm3BF2XS8rwG6yGw47YB0axdASHwm/icC6p5koT1bI7Zqi3oHmRfbg4BGO6fmIzA72XG+hezBrw1nsm76ds4QwrCehkARshTsEyjvW5m31d/g1HqDk6UGV2I22HIkkyK5Ea5jrVeAzoc8vU3dkm7RirotdNWhTy1JeYesUdRj9iw4CO9aSyrRPOFOt87eqRYd699PZA7xbIJ3FLjnT4FzlzouTRFvAV5MMs4gBh9q+rqw+j8+q73UjTLx1gRoSLYuIAI4L5QUqtgK4SP8fh936PxEy5H7u S/peBgov MPWlojlBvhH+qqOeelIWD3Fhy0wUwxHVDu953oLi1WBQ+XseIiigNd6sejjNJliovULoBpc0SHz2RxcEBwBI0UMZeE24Kl4QzrBxu6ASaD4vuJDAS2pjvVDh7ysy9FSFEKnIEy5tOhynnT45f9Ue3VxE54nCKwQvEUFa46mZ1wPVpSETKpLQQ0Gv39jTgoRQvtIz/+brOLsl2/o0tTae/BmRhLxW2Q0rEuS0xg09C5eBySC7URvxX+1I6+wZK823+q9ezVQOpEIX5EXbFPQmKzF2rutRpN1vhz+Ne 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: Relocate the per-hstate struct kobject pointer from struct node_hstate into a standalone structure. This change prepares for a future patch that adds epoll support to the =E2=80=9Czeroable_hugepages=E2=80=9D interface. When a huge folio is freed = we must emit an event, yet the freeing context may be atomic; therefore the notification will be delegated to a workqueue. Extracting the struct kobject pointer allows the workqueue callback to obtain it effortlessly. Signed-off-by: Li Zhe --- mm/hugetlb_sysfs.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/mm/hugetlb_sysfs.c b/mm/hugetlb_sysfs.c index 3f25a24e27cf..03b774b1191a 100644 --- a/mm/hugetlb_sysfs.c +++ b/mm/hugetlb_sysfs.c @@ -338,6 +338,10 @@ static int hugetlb_sysfs_add_hstate(struct hstate *h, = struct kobject *parent, #ifdef CONFIG_NUMA static bool hugetlb_sysfs_initialized __ro_after_init; =20 +struct node_hstate_item { + struct kobject *hstate_kobj; +}; + /* * node_hstate/s - associate per node hstate attributes, via their kobject= s, * with node devices in node_devices[] using a parallel array. The array @@ -347,7 +351,7 @@ static bool hugetlb_sysfs_initialized __ro_after_init; */ struct node_hstate { struct kobject *hugepages_kobj; - struct kobject *hstate_kobjs[HUGE_MAX_HSTATE]; + struct node_hstate_item items[HUGE_MAX_HSTATE]; }; static struct node_hstate node_hstates[MAX_NUMNODES]; =20 @@ -501,7 +505,7 @@ static struct hstate *kobj_to_node_hstate(struct kobjec= t *kobj, int *nidp) struct node_hstate *nhs =3D &node_hstates[nid]; int i; for (i =3D 0; i < HUGE_MAX_HSTATE; i++) - if (nhs->hstate_kobjs[i] =3D=3D kobj) { + if (nhs->items[i].hstate_kobj =3D=3D kobj) { if (nidp) *nidp =3D nid; return &hstates[i]; @@ -526,7 +530,7 @@ void hugetlb_unregister_node(struct node *node) =20 for_each_hstate(h) { int idx =3D hstate_index(h); - struct kobject *hstate_kobj =3D nhs->hstate_kobjs[idx]; + struct kobject *hstate_kobj =3D nhs->items[idx].hstate_kobj; =20 if (!hstate_kobj) continue; @@ -534,7 +538,7 @@ void hugetlb_unregister_node(struct node *node) sysfs_remove_group(hstate_kobj, &hstate_demote_attr_group); sysfs_remove_group(hstate_kobj, &per_node_hstate_attr_group); kobject_put(hstate_kobj); - nhs->hstate_kobjs[idx] =3D NULL; + nhs->items[idx].hstate_kobj =3D NULL; } =20 kobject_put(nhs->hugepages_kobj); @@ -565,7 +569,7 @@ void hugetlb_register_node(struct node *node) =20 for_each_hstate(h) { err =3D hugetlb_sysfs_add_hstate(h, nhs->hugepages_kobj, - &nhs->hstate_kobjs[hstate_index(h)], + &nhs->items[hstate_index(h)].hstate_kobj, &per_node_hstate_attr_group); if (err) { pr_err("HugeTLB: Unable to add hstate %s for node %d\n", --=20 2.20.1