提交 87744ab3 编写于 作者: D Dan Williams 提交者: Linus Torvalds

mm: fix cache mode tracking in vm_insert_mixed()

vm_insert_mixed() unlike vm_insert_pfn_prot() and vmf_insert_pfn_pmd(),
fails to check the pgprot_t it uses for the mapping against the one
recorded in the memtype tracking tree.  Add the missing call to
track_pfn_insert() to preclude cases where incompatible aliased mappings
are established for a given physical address range.

Link: http://lkml.kernel.org/r/147328717909.35069.14256589123570653697.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by: NDan Williams <dan.j.williams@intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 d66ba15b
...@@ -1649,10 +1649,14 @@ EXPORT_SYMBOL(vm_insert_pfn_prot); ...@@ -1649,10 +1649,14 @@ EXPORT_SYMBOL(vm_insert_pfn_prot);
int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr, int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
pfn_t pfn) pfn_t pfn)
{ {
pgprot_t pgprot = vma->vm_page_prot;
BUG_ON(!(vma->vm_flags & VM_MIXEDMAP)); BUG_ON(!(vma->vm_flags & VM_MIXEDMAP));
if (addr < vma->vm_start || addr >= vma->vm_end) if (addr < vma->vm_start || addr >= vma->vm_end)
return -EFAULT; return -EFAULT;
if (track_pfn_insert(vma, &pgprot, pfn))
return -EINVAL;
/* /*
* If we don't have pte special, then we have to use the pfn_valid() * If we don't have pte special, then we have to use the pfn_valid()
...@@ -1670,9 +1674,9 @@ int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr, ...@@ -1670,9 +1674,9 @@ int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
* result in pfn_t_has_page() == false. * result in pfn_t_has_page() == false.
*/ */
page = pfn_to_page(pfn_t_to_pfn(pfn)); page = pfn_to_page(pfn_t_to_pfn(pfn));
return insert_page(vma, addr, page, vma->vm_page_prot); return insert_page(vma, addr, page, pgprot);
} }
return insert_pfn(vma, addr, pfn, vma->vm_page_prot); return insert_pfn(vma, addr, pfn, pgprot);
} }
EXPORT_SYMBOL(vm_insert_mixed); EXPORT_SYMBOL(vm_insert_mixed);
......
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