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Diffstat (limited to 'arch/s390/mm/vmem.c')
-rw-r--r--arch/s390/mm/vmem.c45
1 files changed, 27 insertions, 18 deletions
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index c22abf900c9e..387c7c60b5b8 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -79,7 +79,8 @@ static pte_t __ref *vmem_pte_alloc(unsigned long address)
*/
static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
{
- unsigned long address;
+ unsigned long end = start + size;
+ unsigned long address = start;
pgd_t *pg_dir;
pud_t *pu_dir;
pmd_t *pm_dir;
@@ -87,7 +88,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
pte_t pte;
int ret = -ENOMEM;
- for (address = start; address < start + size; address += PAGE_SIZE) {
+ while (address < end) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
pu_dir = vmem_pud_alloc();
@@ -108,12 +109,11 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
pm_dir = pmd_offset(pu_dir, address);
#if defined(CONFIG_64BIT) && !defined(CONFIG_DEBUG_PAGEALLOC)
- if (MACHINE_HAS_HPAGE && !(address & ~HPAGE_MASK) &&
- (address + HPAGE_SIZE <= start + size) &&
- (address >= HPAGE_SIZE)) {
+ if (MACHINE_HAS_EDAT1 && pmd_none(*pm_dir) && address &&
+ !(address & ~PMD_MASK) && (address + PMD_SIZE <= end)) {
pte_val(pte) |= _SEGMENT_ENTRY_LARGE;
pmd_val(*pm_dir) = pte_val(pte);
- address += HPAGE_SIZE - PAGE_SIZE;
+ address += PMD_SIZE;
continue;
}
#endif
@@ -126,10 +126,11 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
pt_dir = pte_offset_kernel(pm_dir, address);
*pt_dir = pte;
+ address += PAGE_SIZE;
}
ret = 0;
out:
- flush_tlb_kernel_range(start, start + size);
+ flush_tlb_kernel_range(start, end);
return ret;
}
@@ -139,7 +140,8 @@ out:
*/
static void vmem_remove_range(unsigned long start, unsigned long size)
{
- unsigned long address;
+ unsigned long end = start + size;
+ unsigned long address = start;
pgd_t *pg_dir;
pud_t *pu_dir;
pmd_t *pm_dir;
@@ -147,25 +149,32 @@ static void vmem_remove_range(unsigned long start, unsigned long size)
pte_t pte;
pte_val(pte) = _PAGE_TYPE_EMPTY;
- for (address = start; address < start + size; address += PAGE_SIZE) {
+ while (address < end) {
pg_dir = pgd_offset_k(address);
+ if (pgd_none(*pg_dir)) {
+ address += PGDIR_SIZE;
+ continue;
+ }
pu_dir = pud_offset(pg_dir, address);
- if (pud_none(*pu_dir))
+ if (pud_none(*pu_dir)) {
+ address += PUD_SIZE;
continue;
+ }
pm_dir = pmd_offset(pu_dir, address);
- if (pmd_none(*pm_dir))
+ if (pmd_none(*pm_dir)) {
+ address += PMD_SIZE;
continue;
-
- if (pmd_huge(*pm_dir)) {
+ }
+ if (pmd_large(*pm_dir)) {
pmd_clear(pm_dir);
- address += HPAGE_SIZE - PAGE_SIZE;
+ address += PMD_SIZE;
continue;
}
-
pt_dir = pte_offset_kernel(pm_dir, address);
*pt_dir = pte;
+ address += PAGE_SIZE;
}
- flush_tlb_kernel_range(start, start + size);
+ flush_tlb_kernel_range(start, end);
}
/*
@@ -330,8 +339,8 @@ void __init vmem_map_init(void)
unsigned long start, end;
int i;
- ro_start = ((unsigned long)&_stext) & PAGE_MASK;
- ro_end = PFN_ALIGN((unsigned long)&_eshared);
+ ro_start = PFN_ALIGN((unsigned long)&_stext);
+ ro_end = (unsigned long)&_eshared & PAGE_MASK;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
if (memory_chunk[i].type == CHUNK_CRASHK ||
memory_chunk[i].type == CHUNK_OLDMEM)