Commit cc643d46 authored by Jan Beulich's avatar Jan Beulich Committed by Ingo Molnar
Browse files

x86: adjust vmalloc_sync_all() for Xen (2nd try)



Since the fourth PDPT entry cannot be shared under Xen,
vmalloc_sync_all() must iterate over pmd-s rather than pgd-s here.
Luckily, the code isn't used for native PAE (SHARED_KERNEL_PMD is 1)
and the change is benign to non-PAE.

Also do a little more cleanup in that function.
Signed-off-by: default avatarJan Beulich <jbeulich@novell.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
parent 913da64b
......@@ -915,15 +915,15 @@ LIST_HEAD(pgd_list);
void vmalloc_sync_all(void)
{
#ifdef CONFIG_X86_32
unsigned long start = VMALLOC_START & PGDIR_MASK;
unsigned long address;
#ifdef CONFIG_X86_32
if (SHARED_KERNEL_PMD)
return;
BUILD_BUG_ON(TASK_SIZE & ~PGDIR_MASK);
for (address = start; address >= TASK_SIZE; address += PGDIR_SIZE) {
for (address = VMALLOC_START & PMD_MASK;
address >= TASK_SIZE && address < FIXADDR_TOP;
address += PMD_SIZE) {
unsigned long flags;
struct page *page;
......@@ -936,10 +936,8 @@ void vmalloc_sync_all(void)
spin_unlock_irqrestore(&pgd_lock, flags);
}
#else /* CONFIG_X86_64 */
unsigned long start = VMALLOC_START & PGDIR_MASK;
unsigned long address;
for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
for (address = VMALLOC_START & PGDIR_MASK; address <= VMALLOC_END;
address += PGDIR_SIZE) {
const pgd_t *pgd_ref = pgd_offset_k(address);
unsigned long flags;
struct page *page;
......
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