drm: remove dev->vma_count

This is just used for a debugfs file, and we can easily reconstruct
this number by just walking the list twice. Which isn't really bad for
a debugfs file anyway.

So let's rip this out.

There's the other issue that the dev->vmalist itself is a bit useless,
since that can be reconstructed with all the memory mapping
information from proc. But remove that is a different topic entirely.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 330f3dd..7f2af9a 100644 (file)
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -391,8 +391,6 @@ static void drm_legacy_dev_reinit(struct drm_device *dev)
        if (drm_core_check_feature(dev, DRIVER_MODESET))
                return;
 
-       atomic_set(&dev->vma_count, 0);
-
        dev->sigdata.lock = NULL;
 
        dev->context_flag = 0;

diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
index 31da45c..7473035 100644 (file)
--- a/drivers/gpu/drm/drm_info.c
+++ b/drivers/gpu/drm/drm_info.c
@@ -234,14 +234,18 @@ int drm_vma_info(struct seq_file *m, void *data)
        struct drm_device *dev = node->minor->dev;
        struct drm_vma_entry *pt;
        struct vm_area_struct *vma;
+       unsigned long vma_count = 0;
 #if defined(__i386__)
        unsigned int pgprot;
 #endif
 
        mutex_lock(&dev->struct_mutex);
-       seq_printf(m, "vma use count: %d, high_memory = %pK, 0x%pK\n",
-                  atomic_read(&dev->vma_count),
-                  high_memory, (void *)(unsigned long)virt_to_phys(high_memory));
+       list_for_each_entry(pt, &dev->vmalist, head)
+               vma_count++;
+
+       seq_printf(m, "vma use count: %lu, high_memory = %pK, 0x%pK\n",
+                  vma_count, high_memory,
+                  (void *)(unsigned long)virt_to_phys(high_memory));
 
        list_for_each_entry(pt, &dev->vmalist, head) {
                vma = pt->vma;

diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index ef5540b..24e045c 100644 (file)
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -220,7 +220,6 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
 
        DRM_DEBUG("0x%08lx,0x%08lx\n",
                  vma->vm_start, vma->vm_end - vma->vm_start);
-       atomic_dec(&dev->vma_count);
 
        map = vma->vm_private_data;
 
@@ -405,7 +404,6 @@ void drm_vm_open_locked(struct drm_device *dev,
 
        DRM_DEBUG("0x%08lx,0x%08lx\n",
                  vma->vm_start, vma->vm_end - vma->vm_start);
-       atomic_inc(&dev->vma_count);
 
        vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL);
        if (vma_entry) {
@@ -433,7 +431,6 @@ void drm_vm_close_locked(struct drm_device *dev,
 
        DRM_DEBUG("0x%08lx,0x%08lx\n",
                  vma->vm_start, vma->vm_end - vma->vm_start);
-       atomic_dec(&dev->vma_count);
 
        list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
                if (pt->vma == vma) {

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 5b6c33c..2fe9b5d 100644 (file)
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1109,7 +1109,6 @@ struct drm_device {
        /** \name Usage Counters */
        /*@{ */
        int open_count;                 /**< Outstanding files open */
-       atomic_t vma_count;             /**< Outstanding vma areas open */
        int buf_use;                    /**< Buffers in use -- cannot alloc */
        atomic_t buf_alloc;             /**< Buffer allocation in progress */
        /*@} */