maps4: simplify interdependence of maps and smaps

This pulls the shared map display code out of show_map and puts it in
show_smap where it belongs.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 791b2d4..abc44f3 100644 (file)
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -145,7 +145,7 @@ struct mem_size_stats
        u64 pss;
 };
 
-static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats *mss)
+static int show_map(struct seq_file *m, void *v)
 {
        struct proc_maps_private *priv = m->private;
        struct task_struct *task = priv->task;
@@ -205,35 +205,11 @@ static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats
        }
        seq_putc(m, '\n');
 
-       if (mss)
-               seq_printf(m,
-                          "Size:           %8lu kB\n"
-                          "Rss:            %8lu kB\n"
-                          "Pss:            %8lu kB\n"
-                          "Shared_Clean:   %8lu kB\n"
-                          "Shared_Dirty:   %8lu kB\n"
-                          "Private_Clean:  %8lu kB\n"
-                          "Private_Dirty:  %8lu kB\n"
-                          "Referenced:     %8lu kB\n",
-                          (vma->vm_end - vma->vm_start) >> 10,
-                          mss->resident >> 10,
-                          (unsigned long)(mss->pss >> (10 + PSS_SHIFT)),
-                          mss->shared_clean  >> 10,
-                          mss->shared_dirty  >> 10,
-                          mss->private_clean >> 10,
-                          mss->private_dirty >> 10,
-                          mss->referenced >> 10);
-
        if (m->count < m->size)  /* vma is copied successfully */
                m->version = (vma != get_gate_vma(task))? vma->vm_start: 0;
        return 0;
 }
 
-static int show_map(struct seq_file *m, void *v)
-{
-       return show_map_internal(m, v, NULL);
-}
-
 static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
                           void *private)
 {
@@ -312,13 +288,37 @@ static int show_smap(struct seq_file *m, void *v)
 {
        struct vm_area_struct *vma = v;
        struct mem_size_stats mss;
+       int ret;
 
        memset(&mss, 0, sizeof mss);
        mss.vma = vma;
        if (vma->vm_mm && !is_vm_hugetlb_page(vma))
                walk_page_range(vma->vm_mm, vma->vm_start, vma->vm_end,
                                &smaps_walk, &mss);
-       return show_map_internal(m, v, &mss);
+
+       ret = show_map(m, v);
+       if (ret)
+               return ret;
+
+       seq_printf(m,
+                  "Size:           %8lu kB\n"
+                  "Rss:            %8lu kB\n"
+                  "Pss:            %8lu kB\n"
+                  "Shared_Clean:   %8lu kB\n"
+                  "Shared_Dirty:   %8lu kB\n"
+                  "Private_Clean:  %8lu kB\n"
+                  "Private_Dirty:  %8lu kB\n"
+                  "Referenced:     %8lu kB\n",
+                  (vma->vm_end - vma->vm_start) >> 10,
+                  mss.resident >> 10,
+                  (unsigned long)(mss.pss >> (10 + PSS_SHIFT)),
+                  mss.shared_clean  >> 10,
+                  mss.shared_dirty  >> 10,
+                  mss.private_clean >> 10,
+                  mss.private_dirty >> 10,
+                  mss.referenced >> 10);
+
+       return ret;
 }
 
 static struct mm_walk clear_refs_walk = { .pmd_entry = clear_refs_pte_range };