4 files changed, 15 insertions, 19 deletions

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 6573f31f1fd..075d3e94560 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -204,10 +204,6 @@ int proc_fill_super(struct super_block *s, void *data, int silent)
 	root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
 	if (!root_inode)
 		goto out_no_root;
-	/*
-	 * Fixup the root inode's nlink value
-	 */
-	root_inode->i_nlink += nr_processes();
 	root_inode->i_uid = 0;
 	root_inode->i_gid = 0;
 	s->s_root = d_alloc_root(root_inode);
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 8f8014285a3..1d24fead51a 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -548,7 +548,7 @@ static int show_stat(struct seq_file *p, void *v)
 	}
 	seq_printf(p, "intr %llu", (unsigned long long)sum);
 
-#if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
+#if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
 	for (i = 0; i < NR_IRQS; i++)
 		seq_printf(p, " %u", kstat_irqs(i));
 #endif
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 68896283c8a..c3fd3611112 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -80,16 +80,16 @@ void __init proc_root_init(void)
 	proc_bus = proc_mkdir("bus", NULL);
 }
 
-static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat
+)
 {
-	/*
-	 * nr_threads is actually protected by the tasklist_lock;
-	 * however, it's conventional to do reads, especially for
-	 * reporting, without any locking whatsoever.
-	 */
-	if (dir->i_ino == PROC_ROOT_INO) /* check for safety... */
-		dir->i_nlink = proc_root.nlink + nr_threads;
+	generic_fillattr(dentry->d_inode, stat);
+	stat->nlink = proc_root.nlink + nr_processes();
+	return 0;
+}
 
+static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+{
 	if (!proc_lookup(dir, dentry, nd)) {
 		return NULL;
 	}
@@ -134,6 +134,7 @@ static struct file_operations proc_root_operations = {
  */
 static struct inode_operations proc_root_inode_operations = {
 	.lookup		= proc_root_lookup,
+	.getattr	= proc_root_getattr,
 };
 
 /*
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 0eaad41f465..91b7c15ab37 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -204,7 +204,6 @@ static void smaps_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
 {
 	pte_t *pte, ptent;
 	spinlock_t *ptl;
-	unsigned long pfn;
 	struct page *page;
 
 	pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
@@ -214,12 +213,12 @@ static void smaps_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
 			continue;
 
 		mss->resident += PAGE_SIZE;
-		pfn = pte_pfn(ptent);
-		if (!pfn_valid(pfn))
+
+		page = vm_normal_page(vma, addr, ptent);
+		if (!page)
 			continue;
 
-		page = pfn_to_page(pfn);
-		if (page_count(page) >= 2) {
+		if (page_mapcount(page) >= 2) {
 			if (pte_dirty(ptent))
 				mss->shared_dirty += PAGE_SIZE;
 			else
@@ -289,7 +288,7 @@ static int show_smap(struct seq_file *m, void *v)
 	struct mem_size_stats mss;
 
 	memset(&mss, 0, sizeof mss);
-	if (vma->vm_mm)
+	if (vma->vm_mm && !is_vm_hugetlb_page(vma))
 		smaps_pgd_range(vma, vma->vm_start, vma->vm_end, &mss);
 	return show_map_internal(m, v, &mss);
 }