x86, mm: Separate x86_64 vmalloc_sync_all() into separate functions

No behavior change.

Move some of vmalloc_sync_all() code into a new function
sync_global_pgds() that will be useful for memory hotplug.

Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
LKML-Reference: <4C6E4ECD.1090607@linux.intel.com>
Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Haicheng Li
2010-05-19 17:42:14 +08:00
committed by H. Peter Anvin
parent 61c77326d1
commit 6afb5157b9
3 changed files with 33 additions and 23 deletions

View File

@@ -326,29 +326,7 @@ out:
void vmalloc_sync_all(void)
{
unsigned long address;
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;
if (pgd_none(*pgd_ref))
continue;
spin_lock_irqsave(&pgd_lock, flags);
list_for_each_entry(page, &pgd_list, lru) {
pgd_t *pgd;
pgd = (pgd_t *)page_address(page) + pgd_index(address);
if (pgd_none(*pgd))
set_pgd(pgd, *pgd_ref);
else
BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
}
spin_unlock_irqrestore(&pgd_lock, flags);
}
sync_global_pgds(VMALLOC_START & PGDIR_MASK, VMALLOC_END);
}
/*