add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/s390/mm/pageattr.c
..
..
@@ -7,7 +7,6 @@
7
7
 #include <linux/mm.h>
8
8
 #include <asm/cacheflush.h>
9
9
 #include <asm/facility.h>
10
-#include <asm/pgtable.h>
11
10
 #include <asm/pgalloc.h>
12
11
 #include <asm/page.h>
13
12
 #include <asm/set_memory.h>
..
..
@@ -86,7 +85,7 @@
86
85
 {
87
86
 	pte_t *ptep, new;
88
87
 
89
-	ptep = pte_offset(pmdp, addr);
88
+	ptep = pte_offset_kernel(pmdp, addr);
90
89
 	do {
91
90
 		new = *ptep;
92
91
 		if (pte_none(new))
..
..
@@ -279,7 +278,7 @@
279
278
 	return rc;
280
279
 }
281
280
 
282
-static DEFINE_MUTEX(cpa_mutex);
281
+DEFINE_MUTEX(cpa_mutex);
283
282
 
284
283
 static int change_page_attr(unsigned long addr, unsigned long end,
285
284
 			    unsigned long flags)
..
..
@@ -338,19 +337,11 @@
338
337
 {
339
338
 	unsigned long address;
340
339
 	int nr, i, j;
341
-	pgd_t *pgd;
342
-	p4d_t *p4d;
343
-	pud_t *pud;
344
-	pmd_t *pmd;
345
340
 	pte_t *pte;
346
341
 
347
342
 	for (i = 0; i < numpages;) {
348
343
 		address = page_to_phys(page + i);
349
-		pgd = pgd_offset_k(address);
350
-		p4d = p4d_offset(pgd, address);
351
-		pud = pud_offset(p4d, address);
352
-		pmd = pmd_offset(pud, address);
353
-		pte = pte_offset_kernel(pmd, address);
344
+		pte = virt_to_kpte(address);
354
345
 		nr = (unsigned long)pte >> ilog2(sizeof(long));
355
346
 		nr = PTRS_PER_PTE - (nr & (PTRS_PER_PTE - 1));
356
347
 		nr = min(numpages - i, nr);
..
..
@@ -366,21 +357,5 @@
366
357
 		i += nr;
367
358
 	}
368
359
 }
369
-
370
-#ifdef CONFIG_HIBERNATION
371
-bool kernel_page_present(struct page *page)
372
-{
373
-	unsigned long addr;
374
-	int cc;
375
-
376
-	addr = page_to_phys(page);
377
-	asm volatile(
378
-		"	lra	%1,0(%1)\n"
379
-		"	ipm	%0\n"
380
-		"	srl	%0,28"
381
-		: "=d" (cc), "+a" (addr) : : "cc");
382
-	return cc == 0;
383
-}
384
-#endif /* CONFIG_HIBERNATION */
385
360
 
386
361
 #endif /* CONFIG_DEBUG_PAGEALLOC */