From 4c86d2f51a0b2f8f7793129660f1232ec01d562b Mon Sep 17 00:00:00 2001
From: Alexander Gordeev <agordeev@linux.ibm.com>
Date: Fri, 12 Feb 2021 07:43:19 +0100
Subject: [PATCH] s390/mm: fix phys vs virt confusion in vmem_*() functions
family
Due to historical reasons vmem_*() functions misuse
or ignore the notion of physical vs virtual addresses
difference.
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
arch/s390/mm/vmem.c | 30 +++++++++++++++---------------
1 file changed, 15 insertions(+), 15 deletions(-)
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 01f3a5f58e642..77afa28876a11 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -26,14 +26,14 @@ static void __ref *vmem_alloc_pages(unsigned int order)
if (slab_is_available())
return (void *)__get_free_pages(GFP_KERNEL, order);
- return (void *) memblock_phys_alloc(size, size);
+ return memblock_alloc(size, size);
}
static void vmem_free_pages(unsigned long addr, int order)
{
/* We don't expect boot memory to be removed ever. */
if (!slab_is_available() ||
- WARN_ON_ONCE(PageReserved(phys_to_page(addr))))
+ WARN_ON_ONCE(PageReserved(virt_to_page(addr))))
return;
free_pages(addr, order);
}
@@ -56,7 +56,7 @@ pte_t __ref *vmem_pte_alloc(void)
if (slab_is_available())
pte = (pte_t *) page_table_alloc(&init_mm);
else
- pte = (pte_t *) memblock_phys_alloc(size, size);
+ pte = (pte_t *) memblock_alloc(size, size);
if (!pte)
return NULL;
memset64((u64 *)pte, _PAGE_INVALID, PTRS_PER_PTE);
@@ -84,7 +84,7 @@ static void vmemmap_flush_unused_sub_pmd(void)
{
if (!unused_sub_pmd_start)
return;
- memset(__va(unused_sub_pmd_start), PAGE_UNUSED,
+ memset((void *)unused_sub_pmd_start, PAGE_UNUSED,
ALIGN(unused_sub_pmd_start, PMD_SIZE) - unused_sub_pmd_start);
unused_sub_pmd_start = 0;
}
@@ -97,7 +97,7 @@ static void vmemmap_mark_sub_pmd_used(unsigned long start, unsigned long end)
* getting removed (just in case the memmap never gets initialized,
* e.g., because the memory block never gets onlined).
*/
- memset(__va(start), 0, sizeof(struct page));
+ memset((void *)start, 0, sizeof(struct page));
}
static void vmemmap_use_sub_pmd(unsigned long start, unsigned long end)
@@ -118,7 +118,7 @@ static void vmemmap_use_sub_pmd(unsigned long start, unsigned long end)
static void vmemmap_use_new_sub_pmd(unsigned long start, unsigned long end)
{
- void *page = __va(ALIGN_DOWN(start, PMD_SIZE));
+ unsigned long page = ALIGN_DOWN(start, PMD_SIZE);
vmemmap_flush_unused_sub_pmd();
@@ -127,7 +127,7 @@ static void vmemmap_use_new_sub_pmd(unsigned long start, unsigned long end)
/* Mark the unused parts of the new memmap page PAGE_UNUSED. */
if (!IS_ALIGNED(start, PMD_SIZE))
- memset(page, PAGE_UNUSED, start - __pa(page));
+ memset((void *)page, PAGE_UNUSED, start - page);
/*
* We want to avoid memset(PAGE_UNUSED) when populating the vmemmap of
* consecutive sections. Remember for the last added PMD the last
@@ -140,11 +140,11 @@ static void vmemmap_use_new_sub_pmd(unsigned long start, unsigned long end)
/* Returns true if the PMD is completely unused and can be freed. */
static bool vmemmap_unuse_sub_pmd(unsigned long start, unsigned long end)
{
- void *page = __va(ALIGN_DOWN(start, PMD_SIZE));
+ unsigned long page = ALIGN_DOWN(start, PMD_SIZE);
vmemmap_flush_unused_sub_pmd();
- memset(__va(start), PAGE_UNUSED, end - start);
- return !memchr_inv(page, PAGE_UNUSED, PMD_SIZE);
+ memset((void *)start, PAGE_UNUSED, end - start);
+ return !memchr_inv((void *)page, PAGE_UNUSED, PMD_SIZE);
}
/* __ref: we'll only call vmemmap_alloc_block() via vmemmap_populate() */
@@ -165,7 +165,7 @@ static int __ref modify_pte_table(pmd_t *pmd, unsigned long addr,
if (pte_none(*pte))
continue;
if (!direct)
- vmem_free_pages(pfn_to_phys(pte_pfn(*pte)), 0);
+ vmem_free_pages((unsigned long) pfn_to_virt(pte_pfn(*pte)), 0);
pte_clear(&init_mm, addr, pte);
} else if (pte_none(*pte)) {
if (!direct) {
@@ -175,7 +175,7 @@ static int __ref modify_pte_table(pmd_t *pmd, unsigned long addr,
goto out;
pte_val(*pte) = __pa(new_page) | prot;
} else {
- pte_val(*pte) = addr | prot;
+ pte_val(*pte) = __pa(addr) | prot;
}
} else {
continue;
@@ -200,7 +200,7 @@ static void try_free_pte_table(pmd_t *pmd, unsigned long start)
if (!pte_none(*pte))
return;
}
- vmem_pte_free(__va(pmd_deref(*pmd)));
+ vmem_pte_free((unsigned long *) pmd_deref(*pmd));
pmd_clear(pmd);
}
@@ -241,7 +241,7 @@ static int __ref modify_pmd_table(pud_t *pud, unsigned long addr,
IS_ALIGNED(next, PMD_SIZE) &&
MACHINE_HAS_EDAT1 && addr && direct &&
!debug_pagealloc_enabled()) {
- pmd_val(*pmd) = addr | prot;
+ pmd_val(*pmd) = __pa(addr) | prot;
pages++;
continue;
} else if (!direct && MACHINE_HAS_EDAT1) {
@@ -337,7 +337,7 @@ static int modify_pud_table(p4d_t *p4d, unsigned long addr, unsigned long end,
IS_ALIGNED(next, PUD_SIZE) &&
MACHINE_HAS_EDAT2 && addr && direct &&
!debug_pagealloc_enabled()) {
- pud_val(*pud) = addr | prot;
+ pud_val(*pud) = __pa(addr) | prot;
pages++;
continue;
}
--
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