Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

[linux.git] / include / linux / huge_mm.h

diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index 7cd5c150c21d9ebed9aeba2c0306a7d88b4233a7..45ede62aa85be47370719dae4004c88ec1796e06 100644 (file)
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -121,6 +121,23 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
 
 bool transparent_hugepage_enabled(struct vm_area_struct *vma);
 
+#define HPAGE_CACHE_INDEX_MASK (HPAGE_PMD_NR - 1)
+
+static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
+               unsigned long haddr)
+{
+       /* Don't have to check pgoff for anonymous vma */
+       if (!vma_is_anonymous(vma)) {
+               if (((vma->vm_start >> PAGE_SHIFT) & HPAGE_CACHE_INDEX_MASK) !=
+                       (vma->vm_pgoff & HPAGE_CACHE_INDEX_MASK))
+                       return false;
+       }
+
+       if (haddr < vma->vm_start || haddr + HPAGE_PMD_SIZE > vma->vm_end)
+               return false;
+       return true;
+}
+
 #define transparent_hugepage_use_zero_page()                           \
        (transparent_hugepage_flags &                                   \
         (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG))
@@ -271,6 +288,12 @@ static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma)
        return false;
 }
 
+static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
+               unsigned long haddr)
+{
+       return false;
+}
+
 static inline void prep_transhuge_page(struct page *page) {}
 
 #define transparent_hugepage_flags 0UL