Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Conflict resolution of af_smc.c from Stephen Rothwell.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/dax.c b/fs/dax.c
index ca0671d55aa6..e5e54da1715f 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -33,6 +33,7 @@
 #include <linux/sizes.h>
 #include <linux/mmu_notifier.h>
 #include <linux/iomap.h>
+#include <asm/pgalloc.h>
 #include "internal.h"
 
 #define CREATE_TRACE_POINTS
@@ -1407,7 +1408,9 @@ static vm_fault_t dax_pmd_load_hole(struct xa_state *xas, struct vm_fault *vmf,
 {
         struct address_space *mapping = vmf->vma->vm_file->f_mapping;
         unsigned long pmd_addr = vmf->address & PMD_MASK;
+        struct vm_area_struct *vma = vmf->vma;
         struct inode *inode = mapping->host;
+        pgtable_t pgtable = NULL;
         struct page *zero_page;
         spinlock_t *ptl;
         pmd_t pmd_entry;
@@ -1422,12 +1425,22 @@ static vm_fault_t dax_pmd_load_hole(struct xa_state *xas, struct vm_fault *vmf,
         *entry = dax_insert_entry(xas, mapping, vmf, *entry, pfn,
                         DAX_PMD | DAX_ZERO_PAGE, false);
 
+        if (arch_needs_pgtable_deposit()) {
+                pgtable = pte_alloc_one(vma->vm_mm);
+                if (!pgtable)
+                        return VM_FAULT_OOM;
+        }
+
         ptl = pmd_lock(vmf->vma->vm_mm, vmf->pmd);
         if (!pmd_none(*(vmf->pmd))) {
                 spin_unlock(ptl);
                 goto fallback;
         }
 
+        if (pgtable) {
+                pgtable_trans_huge_deposit(vma->vm_mm, vmf->pmd, pgtable);
+                mm_inc_nr_ptes(vma->vm_mm);
+        }
         pmd_entry = mk_pmd(zero_page, vmf->vma->vm_page_prot);
         pmd_entry = pmd_mkhuge(pmd_entry);
         set_pmd_at(vmf->vma->vm_mm, pmd_addr, vmf->pmd, pmd_entry);
@@ -1436,6 +1449,8 @@ static vm_fault_t dax_pmd_load_hole(struct xa_state *xas, struct vm_fault *vmf,
         return VM_FAULT_NOPAGE;
 
 fallback:
+        if (pgtable)
+                pte_free(vma->vm_mm, pgtable);
         trace_dax_pmd_load_hole_fallback(inode, vmf, zero_page, *entry);
         return VM_FAULT_FALLBACK;
 }