Subject: linux-next: manual merge of the akpm-current tree with the drm tree

From: Stephen Rothwell <[email-masked]>
Date: Mon, 24 Jun 2019 20:49:08 +1000

Hi all,

Today's linux-next merge of the akpm-current tree got a conflict in:

  mm/memory.c

between commit:

  29875a52915e ("mm: Add an apply_to_pfn_range interface")

from the drm tree and commit:

  e972cea08fb3 ("mm/pgtable: drop pgtable_t variable from pte_fn_t functions")

from the akpm-current tree.

I fixed it up (see below my signature, then added the following merge
resolution patch as well) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

From: Stephen Rothwell <[email-masked]>
Date: Mon, 24 Jun 2019 20:40:46 +1000
Subject: [PATCH] merge fixup for "mm: Add an apply_to_pfn_range interface"

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 include/linux/mm.h    | 2 +-
 mm/as_dirty_helpers.c | 8 ++------
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 87d53de3dee4..4404e18443ef 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2673,7 +2673,7 @@ extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,
 			       unsigned long size, pte_fn_t fn, void *data);
 
 struct pfn_range_apply;
-typedef int (*pter_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
+typedef int (*pter_fn_t)(pte_t *pte, unsigned long addr,
 			 struct pfn_range_apply *closure);
 struct pfn_range_apply {
 	struct mm_struct *mm;
diff --git a/mm/as_dirty_helpers.c b/mm/as_dirty_helpers.c
index f600e31534fb..7c863626c2a4 100644
--- a/mm/as_dirty_helpers.c
+++ b/mm/as_dirty_helpers.c
@@ -26,7 +26,6 @@ struct apply_as {
 /**
  * apply_pt_wrprotect - Leaf pte callback to write-protect a pte
  * @pte: Pointer to the pte
- * @token: Page table token, see apply_to_pfn_range()
  * @addr: The virtual page address
  * @closure: Pointer to a struct pfn_range_apply embedded in a
  * struct apply_as
@@ -36,8 +35,7 @@ struct apply_as {
  *
  * Return: Always zero.
  */
-static int apply_pt_wrprotect(pte_t *pte, pgtable_t token,
-			      unsigned long addr,
+static int apply_pt_wrprotect(pte_t *pte, unsigned long addr,
 			      struct pfn_range_apply *closure)
 {
 	struct apply_as *aas = container_of(closure, typeof(*aas), base);
@@ -78,7 +76,6 @@ struct apply_as_clean {
 /**
  * apply_pt_clean - Leaf pte callback to clean a pte
  * @pte: Pointer to the pte
- * @token: Page table token, see apply_to_pfn_range()
  * @addr: The virtual page address
  * @closure: Pointer to a struct pfn_range_apply embedded in a
  * struct apply_as_clean
@@ -91,8 +88,7 @@ struct apply_as_clean {
  *
  * Return: Always zero.
  */
-static int apply_pt_clean(pte_t *pte, pgtable_t token,
-			  unsigned long addr,
+static int apply_pt_clean(pte_t *pte, unsigned long addr,
 			  struct pfn_range_apply *closure)
 {
 	struct apply_as *aas = container_of(closure, typeof(*aas), base);
-- 
2.20.1

-- 
Cheers,
Stephen Rothwell

diff --cc mm/memory.c
index 462aa47f8878,f8a75528658a..e7e37fcbd687
--- a/mm/memory.c
+++ b/mm/memory.c
@@@ -2037,12 -2036,11 +2035,11 @@@ static int apply_to_pte_range(struct pf
  {
  	pte_t *pte;
  	int err;
- 	pgtable_t token;
  	spinlock_t *uninitialized_var(ptl);
  
 -	pte = (mm == &init_mm) ?
 +	pte = (closure->mm == &init_mm) ?
  		pte_alloc_kernel(pmd, addr) :
 -		pte_alloc_map_lock(mm, pmd, addr, &ptl);
 +		pte_alloc_map_lock(closure->mm, pmd, addr, &ptl);
  	if (!pte)
  		return -ENOMEM;
  
@@@ -2050,10 -2048,8 +2047,8 @@@
  
  	arch_enter_lazy_mmu_mode();
  
- 	token = pmd_pgtable(*pmd);
- 
  	do {
- 		err = closure->ptefn(pte++, token, addr, closure);
 -		err = fn(pte++, addr, data);
++		err = closure->ptefn(pte++, addr, closure);
  		if (err)
  			break;
  	} while (addr += PAGE_SIZE, addr != end);