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Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  xen: make sure stray alias mappings are gone before pinning
  vmap: cope with vm_unmap_aliases before vmalloc_init()
This commit is contained in:
Linus Torvalds 2008-11-07 09:17:21 -08:00
commit 0477406961
3 changed files with 16 additions and 5 deletions
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5
arch/x86/xen/enlighten.c
View File

@ -863,15 +863,16 @@ static void xen_alloc_ptpage(struct mm_struct *mm, unsigned long pfn, unsigned l
if (PagePinned(virt_to_page(mm->pgd))) {
SetPagePinned(page);
vm_unmap_aliases();
if (!PageHighMem(page)) {
make_lowmem_page_readonly(__va(PFN_PHYS((unsigned long)pfn)));
if (level == PT_PTE && USE_SPLIT_PTLOCKS)
pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, pfn);
} else
} else {
/* make sure there are no stray mappings of
this page */
kmap_flush_unused();
vm_unmap_aliases();
}
}
}

9
arch/x86/xen/mmu.c
View File

@ -850,13 +850,16 @@ static int xen_pin_page(struct mm_struct *mm, struct page *page,
read-only, and can be pinned. */
static void __xen_pgd_pin(struct mm_struct *mm, pgd_t *pgd)
{
vm_unmap_aliases();
xen_mc_batch();
if (xen_pgd_walk(mm, xen_pin_page, USER_LIMIT)) {
/* re-enable interrupts for kmap_flush_unused */
if (xen_pgd_walk(mm, xen_pin_page, USER_LIMIT)) {
/* re-enable interrupts for flushing */
xen_mc_issue(0);
kmap_flush_unused();
vm_unmap_aliases();
xen_mc_batch();
}

7
mm/vmalloc.c
View File

@ -592,6 +592,8 @@ static void free_unmap_vmap_area_addr(unsigned long addr)
#define VMAP_BLOCK_SIZE (VMAP_BBMAP_BITS * PAGE_SIZE)
static bool vmap_initialized __read_mostly = false;
struct vmap_block_queue {
spinlock_t lock;
struct list_head free;
@ -828,6 +830,9 @@ void vm_unmap_aliases(void)
int cpu;
int flush = 0;
if (unlikely(!vmap_initialized))
return;
for_each_possible_cpu(cpu) {
struct vmap_block_queue *vbq = &per_cpu(vmap_block_queue, cpu);
struct vmap_block *vb;
@ -942,6 +947,8 @@ void __init vmalloc_init(void)
INIT_LIST_HEAD(&vbq->dirty);
vbq->nr_dirty = 0;
}
vmap_initialized = true;
}
void unmap_kernel_range(unsigned long addr, unsigned long size)