ARM: PL011: Ensure error flags are clear at startup

[~andy/linux] / fs / proc / task_mmu.c

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 439fc1f1c1c41487ad76d23523d995a9f416b926..da6b01d70f019506face0dae73f0b78c3200d299 100644 (file)
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -224,7 +224,8 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
        /* We don't show the stack guard page in /proc/maps */
        start = vma->vm_start;
        if (vma->vm_flags & VM_GROWSDOWN)
-               start += PAGE_SIZE;
+               if (!vma_stack_continue(vma->vm_prev, vma->vm_start))
+                       start += PAGE_SIZE;
 
        seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n",
                        start,
@@ -326,6 +327,7 @@ struct mem_size_stats {
        unsigned long private_clean;
        unsigned long private_dirty;
        unsigned long referenced;
+       unsigned long anonymous;
        unsigned long swap;
        u64 pss;
 };
@@ -356,19 +358,22 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
                if (!page)
                        continue;
 
+               if (PageAnon(page))
+                       mss->anonymous += PAGE_SIZE;
+
                mss->resident += PAGE_SIZE;
                /* Accumulate the size in pages that have been accessed. */
                if (pte_young(ptent) || PageReferenced(page))
                        mss->referenced += PAGE_SIZE;
                mapcount = page_mapcount(page);
                if (mapcount >= 2) {
-                       if (pte_dirty(ptent))
+                       if (pte_dirty(ptent) || PageDirty(page))
                                mss->shared_dirty += PAGE_SIZE;
                        else
                                mss->shared_clean += PAGE_SIZE;
                        mss->pss += (PAGE_SIZE << PSS_SHIFT) / mapcount;
                } else {
-                       if (pte_dirty(ptent))
+                       if (pte_dirty(ptent) || PageDirty(page))
                                mss->private_dirty += PAGE_SIZE;
                        else
                                mss->private_clean += PAGE_SIZE;
@@ -409,6 +414,7 @@ static int show_smap(struct seq_file *m, void *v)
                   "Private_Clean:  %8lu kB\n"
                   "Private_Dirty:  %8lu kB\n"
                   "Referenced:     %8lu kB\n"
+                  "Anonymous:      %8lu kB\n"
                   "Swap:           %8lu kB\n"
                   "KernelPageSize: %8lu kB\n"
                   "MMUPageSize:    %8lu kB\n",
@@ -420,6 +426,7 @@ static int show_smap(struct seq_file *m, void *v)
                   mss.private_clean >> 10,
                   mss.private_dirty >> 10,
                   mss.referenced >> 10,
+                  mss.anonymous >> 10,
                   mss.swap >> 10,
                   vma_kernel_pagesize(vma) >> 10,
                   vma_mmu_pagesize(vma) >> 10);
@@ -538,6 +545,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 
 const struct file_operations proc_clear_refs_operations = {
        .write          = clear_refs_write,
+       .llseek         = noop_llseek,
 };
 
 struct pagemapread {