Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/kobject.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/memory_hotplug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/mmzone.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/rmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/mmu_notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/page_ext.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/page_idle.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #define BITMAP_CHUNK_SIZE	sizeof(u64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #define BITMAP_CHUNK_BITS	(BITMAP_CHUNK_SIZE * BITS_PER_BYTE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * Idle page tracking only considers user memory pages, for other types of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * pages the idle flag is always unset and an attempt to set it is silently
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * We treat a page as a user memory page if it is on an LRU list, because it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * always safe to pass such a page to rmap_walk(), which is essential for idle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * page tracking. With such an indicator of user pages we can skip isolated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * pages, but since there are not usually many of them, it will hardly affect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * the overall result.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * This function tries to get a user memory page by pfn as described above.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) static struct page *page_idle_get_page(unsigned long pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct page *page = pfn_to_online_page(pfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	pg_data_t *pgdat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	if (!page || !PageLRU(page) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	    !get_page_unless_zero(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	pgdat = page_pgdat(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	spin_lock_irq(&pgdat->lru_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (unlikely(!PageLRU(page))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	spin_unlock_irq(&pgdat->lru_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	return page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static bool page_idle_clear_pte_refs_one(struct page *page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 					struct vm_area_struct *vma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 					unsigned long addr, void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct page_vma_mapped_walk pvmw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		.page = page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		.vma = vma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		.address = addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	bool referenced = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	while (page_vma_mapped_walk(&pvmw)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		addr = pvmw.address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		if (pvmw.pte) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			 * For PTE-mapped THP, one sub page is referenced,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 			 * the whole THP is referenced.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 			if (ptep_clear_young_notify(vma, addr, pvmw.pte))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 				referenced = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		} else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			if (pmdp_clear_young_notify(vma, addr, pvmw.pmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 				referenced = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 			/* unexpected pmd-mapped page? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			WARN_ON_ONCE(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (referenced) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		clear_page_idle(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		 * We cleared the referenced bit in a mapping to this page. To
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		 * avoid interference with page reclaim, mark it young so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		 * page_referenced() will return > 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		set_page_young(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) static void page_idle_clear_pte_refs(struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	 * Since rwc.arg is unused, rwc is effectively immutable, so we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	 * can make it static const to save some cycles and stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	static const struct rmap_walk_control rwc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		.rmap_one = page_idle_clear_pte_refs_one,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		.anon_lock = page_lock_anon_vma_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	bool need_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	if (!page_mapped(page) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	    !page_rmapping(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	need_lock = !PageAnon(page) || PageKsm(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	if (need_lock && !trylock_page(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	rmap_walk(page, (struct rmap_walk_control *)&rwc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (need_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static ssize_t page_idle_bitmap_read(struct file *file, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 				     struct bin_attribute *attr, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 				     loff_t pos, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	u64 *out = (u64 *)buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	unsigned long pfn, end_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	int bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	if (pos % BITMAP_CHUNK_SIZE || count % BITMAP_CHUNK_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	pfn = pos * BITS_PER_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	if (pfn >= max_pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	end_pfn = pfn + count * BITS_PER_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	if (end_pfn > max_pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		end_pfn = max_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	for (; pfn < end_pfn; pfn++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		bit = pfn % BITMAP_CHUNK_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		if (!bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			*out = 0ULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		page = page_idle_get_page(pfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		if (page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			if (page_is_idle(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 				/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 				 * The page might have been referenced via a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 				 * pte, in which case it is not idle. Clear
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 				 * refs and recheck.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 				 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 				page_idle_clear_pte_refs(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 				if (page_is_idle(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 					*out |= 1ULL << bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		if (bit == BITMAP_CHUNK_BITS - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			out++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	return (char *)out - buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static ssize_t page_idle_bitmap_write(struct file *file, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 				      struct bin_attribute *attr, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 				      loff_t pos, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	const u64 *in = (u64 *)buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	unsigned long pfn, end_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	int bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (pos % BITMAP_CHUNK_SIZE || count % BITMAP_CHUNK_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	pfn = pos * BITS_PER_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	if (pfn >= max_pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	end_pfn = pfn + count * BITS_PER_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (end_pfn > max_pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		end_pfn = max_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	for (; pfn < end_pfn; pfn++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		bit = pfn % BITMAP_CHUNK_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		if ((*in >> bit) & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			page = page_idle_get_page(pfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 			if (page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 				page_idle_clear_pte_refs(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 				set_page_idle(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 				put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		if (bit == BITMAP_CHUNK_BITS - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			in++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	return (char *)in - buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static struct bin_attribute page_idle_bitmap_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		__BIN_ATTR(bitmap, 0600,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			   page_idle_bitmap_read, page_idle_bitmap_write, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static struct bin_attribute *page_idle_bin_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	&page_idle_bitmap_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static const struct attribute_group page_idle_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	.bin_attrs = page_idle_bin_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	.name = "page_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static int __init page_idle_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	err = sysfs_create_group(mm_kobj, &page_idle_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		pr_err("page_idle: register sysfs failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) subsys_initcall(page_idle_init);