4 files changed, 15 insertions, 19 deletions

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 6573f31f1f..075d3e9456 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 8f8014285a..1d24fead51 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 68896283c8..c3fd361111 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 0eaad41f46..91b7c15ab3 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);
 }