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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2007-10-22 12:52:48 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-10-22 12:52:49 +0200
commit190a1d722a59725706daf832bc8a511ed62f249d (patch)
treefa4441d0f7833062687e7816e09ec73600ac8523 /arch/s390/mm/vmem.c
parent3610cce87af0693603db171d5b6f6735f5e3dc5b (diff)
[S390] 4level-fixup cleanup
Get independent from asm-generic/4level-fixup.h Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/vmem.c')
-rw-r--r--arch/s390/mm/vmem.c34
1 files changed, 28 insertions, 6 deletions
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 1bd51d840484..fb9c5a85aa56 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -73,6 +73,8 @@ static void __init_refok *vmem_alloc_pages(unsigned int order)
return alloc_bootmem_pages((1 << order) * PAGE_SIZE);
}
+#define vmem_pud_alloc() ({ BUG(); ((pud_t *) NULL); })
+
static inline pmd_t *vmem_pmd_alloc(void)
{
pmd_t *pmd = NULL;
@@ -103,6 +105,7 @@ static int vmem_add_range(unsigned long start, unsigned long size)
{
unsigned long address;
pgd_t *pg_dir;
+ pud_t *pu_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
@@ -111,13 +114,21 @@ static int vmem_add_range(unsigned long start, unsigned long size)
for (address = start; address < start + size; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
+ pu_dir = vmem_pud_alloc();
+ if (!pu_dir)
+ goto out;
+ pgd_populate_kernel(&init_mm, pg_dir, pu_dir);
+ }
+
+ pu_dir = pud_offset(pg_dir, address);
+ if (pud_none(*pu_dir)) {
pm_dir = vmem_pmd_alloc();
if (!pm_dir)
goto out;
- pgd_populate_kernel(&init_mm, pg_dir, pm_dir);
+ pud_populate_kernel(&init_mm, pu_dir, pm_dir);
}
- pm_dir = pmd_offset(pg_dir, address);
+ pm_dir = pmd_offset(pu_dir, address);
if (pmd_none(*pm_dir)) {
pt_dir = vmem_pte_alloc();
if (!pt_dir)
@@ -143,6 +154,7 @@ static void vmem_remove_range(unsigned long start, unsigned long size)
{
unsigned long address;
pgd_t *pg_dir;
+ pud_t *pu_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
@@ -150,9 +162,10 @@ static void vmem_remove_range(unsigned long start, unsigned long size)
pte_val(pte) = _PAGE_TYPE_EMPTY;
for (address = start; address < start + size; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
- if (pgd_none(*pg_dir))
+ pu_dir = pud_offset(pg_dir, address);
+ if (pud_none(*pu_dir))
continue;
- pm_dir = pmd_offset(pg_dir, address);
+ pm_dir = pmd_offset(pu_dir, address);
if (pmd_none(*pm_dir))
continue;
pt_dir = pte_offset_kernel(pm_dir, address);
@@ -169,6 +182,7 @@ static int vmem_add_mem_map(unsigned long start, unsigned long size)
unsigned long address, start_addr, end_addr;
struct page *map_start, *map_end;
pgd_t *pg_dir;
+ pud_t *pu_dir;
pmd_t *pm_dir;
pte_t *pt_dir;
pte_t pte;
@@ -183,13 +197,21 @@ static int vmem_add_mem_map(unsigned long start, unsigned long size)
for (address = start_addr; address < end_addr; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
+ pu_dir = vmem_pud_alloc();
+ if (!pu_dir)
+ goto out;
+ pgd_populate_kernel(&init_mm, pg_dir, pu_dir);
+ }
+
+ pu_dir = pud_offset(pg_dir, address);
+ if (pud_none(*pu_dir)) {
pm_dir = vmem_pmd_alloc();
if (!pm_dir)
goto out;
- pgd_populate_kernel(&init_mm, pg_dir, pm_dir);
+ pud_populate_kernel(&init_mm, pu_dir, pm_dir);
}
- pm_dir = pmd_offset(pg_dir, address);
+ pm_dir = pmd_offset(pu_dir, address);
if (pmd_none(*pm_dir)) {
pt_dir = vmem_pte_alloc();
if (!pt_dir)