[PATCH 6/9] mm: use helper for calling f_op->mmap()

Miklos Szeredi
2017-02-17T16:09:35Z

drivers/gpu/drm/i915/i915_gem_dmabuf.c | 2 +-
drivers/gpu/drm/vgem/vgem_drv.c | 2 +-
fs/coda/file.c | 2 +-
include/linux/fs.h | 5 +++++
ipc/shm.c | 2 +-
mm/mmap.c | 2 +-
mm/nommu.c | 4 ++--
7 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index 5e38299b5df6..84fc9f001576 100644
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -141,7 +141,7 @@ static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *
if (!obj->base.filp)
return -ENODEV;

- ret = obj->base.filp->f_op->mmap(obj->base.filp, vma);
+ ret = call_mmap(obj->base.filp, vma);
if (ret)
return ret;

diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
index 477e07f0ecb6..9f7e222b3e89 100644
--- a/drivers/gpu/drm/vgem/vgem_drv.c
+++ b/drivers/gpu/drm/vgem/vgem_drv.c
@@ -287,7 +287,7 @@ static int vgem_prime_mmap(struct drm_gem_object *obj,
if (!obj->filp)
return -ENODEV;

- ret = obj->filp->f_op->mmap(obj->filp, vma);
+ ret = call_mmap(obj->filp, vma);
if (ret)
return ret;

diff --git a/fs/coda/file.c b/fs/coda/file.c
index 6e0154eb6fcc..9d956cd6d46f 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -96,7 +96,7 @@ coda_file_mmap(struct file *coda_file, struct vm_area_struct *vma)
cfi->cfi_mapcount++;
spin_unlock(&cii->c_lock);

- return host_file->f_op->mmap(host_file, vma);
+ return call_mmap(host_file, vma);
}

int coda_open(struct inode *coda_inode, struct file *coda_file)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index d186d5390e99..4728c5178f3f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1737,6 +1737,11 @@ static inline ssize_t call_write_iter(struct file *file, struct kiocb *kio,
return file->f_op->write_iter(kio, iter);
}

+static inline int call_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ return file->f_op->mmap(file, vma);
+}
+
ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
unsigned long nr_segs, unsigned long fast_segs,
struct iovec *fast_pointer,
diff --git a/ipc/shm.c b/ipc/shm.c
index 81203e8ba013..4329fe3ef594 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -423,7 +423,7 @@ static int shm_mmap(struct file *file, struct vm_area_struct *vma)
if (ret)
return ret;

- ret = sfd->file->f_op->mmap(sfd->file, vma);
+ ret = call_mmap(sfd->file, vma);
if (ret) {
shm_close(vma);
return ret;
diff --git a/mm/mmap.c b/mm/mmap.c
index dc4291dcc99b..3714aa4e6f81 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1668,7 +1668,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
* new file must not have been exposed to user-space, yet.
*/
vma->vm_file = get_file(file);
- error = file->f_op->mmap(file, vma);
+ error = call_mmap(file, vma);
if (error)
goto unmap_and_free_vma;

diff --git a/mm/nommu.c b/mm/nommu.c
index 24f9f5f39145..e366354f777d 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1084,7 +1084,7 @@ static int do_mmap_shared_file(struct vm_area_struct *vma)
{
int ret;

- ret = vma->vm_file->f_op->mmap(vma->vm_file, vma);
+ ret = call_mmap(vma->vm_file, vma);
if (ret == 0) {
vma->vm_region->vm_top = vma->vm_region->vm_end;
return 0;
@@ -1115,7 +1115,7 @@ static int do_mmap_private(struct vm_area_struct *vma,
* - VM_MAYSHARE will be set if it may attempt to share
*/
if (capabilities & NOMMU_MAP_DIRECT) {
- ret = vma->vm_file->f_op->mmap(vma->vm_file, vma);
+ ret = call_mmap(vma->vm_file, vma);
if (ret == 0) {
/* shouldn't return success if we're not sharing */
BUG_ON(!(vma->vm_flags & VM_MAYSHARE));
--
2.5.5