[PATCH 03/14] drm/exynos: remove mutex locking in pagefault handler

[Joonyoung Shim]

There is no reason to use mutex locking in pagefault handler.

Signed-off-by: Joonyoung Shim <jy0922.shim at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_gem.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c 
b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 752cb7c..4741226 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -560,7 +560,6 @@ unlock:
 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
        struct drm_gem_object *obj = vma->vm_private_data;
-       struct drm_device *dev = obj->dev;
        unsigned long f_vaddr;
        pgoff_t page_offset;
        int ret;
@@ -569,14 +568,10 @@ int exynos_drm_gem_fault(struct vm_area_struct *vma, 
struct vm_fault *vmf)
                        vma->vm_start) >> PAGE_SHIFT;
        f_vaddr = (unsigned long)vmf->virtual_address;

-       mutex_lock(&dev->struct_mutex);
-
        ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset);
        if (ret < 0)
                DRM_ERROR("failed to map a buffer with user.\n");

-       mutex_unlock(&dev->struct_mutex);
-
        switch (ret) {
        case 0:
        case -ERESTARTSYS:
-- 
1.9.1