Merge branch 'akpm' (patches from Andrew)

Merge updates from Andrew Morton:
 "A few little subsystems and a start of a lot of MM patches.

  Subsystems affected by this patch series: squashfs, ocfs2, parisc,
  vfs. With mm subsystems: slab-generic, slub, debug, pagecache, gup,
  swap, memcg, pagemap, memory-failure, vmalloc, kasan"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits)
  kasan: move kasan_report() into report.c
  mm/mm_init.c: report kasan-tag information stored in page->flags
  ubsan: entirely disable alignment checks under UBSAN_TRAP
  kasan: fix clang compilation warning due to stack protector
  x86/mm: remove vmalloc faulting
  mm: remove vmalloc_sync_(un)mappings()
  x86/mm/32: implement arch_sync_kernel_mappings()
  x86/mm/64: implement arch_sync_kernel_mappings()
  mm/ioremap: track which page-table levels were modified
  mm/vmalloc: track which page-table levels were modified
  mm: add functions to track page directory modifications
  s390: use __vmalloc_node in stack_alloc
  powerpc: use __vmalloc_node in alloc_vm_stack
  arm64: use __vmalloc_node in arch_alloc_vmap_stack
  mm: remove vmalloc_user_node_flags
  mm: switch the test_vmalloc module to use __vmalloc_node
  mm: remove __vmalloc_node_flags_caller
  mm: remove both instances of __vmalloc_node_flags
  mm: remove the prot argument to __vmalloc_node
  mm: remove the pgprot argument to __vmalloc
  ...

1 files changed, 21 insertions, 14 deletions

diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index 69309cd56fdf..ea9010113f69 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -249,10 +249,22 @@ static void note_wx(struct pg_state *st, unsigned long addr)
 		  (void *)st->start_address);
 }
 
-static inline pgprotval_t effective_prot(pgprotval_t prot1, pgprotval_t prot2)
+static void effective_prot(struct ptdump_state *pt_st, int level, u64 val)
 {
-	return (prot1 & prot2 & (_PAGE_USER | _PAGE_RW)) |
-	       ((prot1 | prot2) & _PAGE_NX);
+	struct pg_state *st = container_of(pt_st, struct pg_state, ptdump);
+	pgprotval_t prot = val & PTE_FLAGS_MASK;
+	pgprotval_t effective;
+
+	if (level > 0) {
+		pgprotval_t higher_prot = st->prot_levels[level - 1];
+
+		effective = (higher_prot & prot & (_PAGE_USER | _PAGE_RW)) |
+			    ((higher_prot | prot) & _PAGE_NX);
+	} else {
+		effective = prot;
+	}
+
+	st->prot_levels[level] = effective;
 }
 
 /*
@@ -261,7 +273,7 @@ static inline pgprotval_t effective_prot(pgprotval_t prot1, pgprotval_t prot2)
  * print what we collected so far.
  */
 static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
-		      unsigned long val)
+		      u64 val)
 {
 	struct pg_state *st = container_of(pt_st, struct pg_state, ptdump);
 	pgprotval_t new_prot, new_eff;
@@ -270,16 +282,10 @@ static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
 	struct seq_file *m = st->seq;
 
 	new_prot = val & PTE_FLAGS_MASK;
-
-	if (level > 0) {
-		new_eff = effective_prot(st->prot_levels[level - 1],
-					 new_prot);
-	} else {
-		new_eff = new_prot;
-	}
-
-	if (level >= 0)
-		st->prot_levels[level] = new_eff;
+	if (!val)
+		new_eff = 0;
+	else
+		new_eff = st->prot_levels[level];
 
 	/*
 	 * If we have a "break" in the series, we need to flush the state that
@@ -374,6 +380,7 @@ static void ptdump_walk_pgd_level_core(struct seq_file *m,
 	struct pg_state st = {
 		.ptdump = {
 			.note_page	= note_page,
+			.effective_prot = effective_prot,
 			.range		= ptdump_ranges
 		},
 		.level = -1,