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drm/tegra: Adding new typedef vm_fault_t 

Use new return type vm_fault_t for fault handler. For now, this is just
documenting that the function returns a VM_FAULT value rather than an
errno. Once all instances are converted, vm_fault_t will become a
distinct type.

Reference id -> 1c8f422059 ("mm: change return type to vm_fault_t")

Previously vm_insert_page() returns err which driver mapped into
VM_FAULT_* type. The new function vmf_insert_page() will replace this
inefficiency by returning VM_FAULT_* type.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Souptick Joarder 2018-04-17 19:17:55 +05:30 committed by Thierry Reding
parent f40e1590c5
commit cc7add70ca
1 changed files with 2 additions and 16 deletions
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18
drivers/gpu/drm/tegra/gem.c
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@ -422,14 +422,13 @@ int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm,
return 0;
}
static int tegra_bo_fault(struct vm_fault *vmf)
static vm_fault_t tegra_bo_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct drm_gem_object *gem = vma->vm_private_data;
struct tegra_bo *bo = to_tegra_bo(gem);
struct page *page;
pgoff_t offset;
int err;
if (!bo->pages)
return VM_FAULT_SIGBUS;
@ -437,20 +436,7 @@ static int tegra_bo_fault(struct vm_fault *vmf)
offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
page = bo->pages[offset];
err = vm_insert_page(vma, vmf->address, page);
switch (err) {
case -EAGAIN:
case 0:
case -ERESTARTSYS:
case -EINTR:
case -EBUSY:
return VM_FAULT_NOPAGE;
case -ENOMEM:
return VM_FAULT_OOM;
}
return VM_FAULT_SIGBUS;
return vmf_insert_page(vma, vmf->address, page);
}
const struct vm_operations_struct tegra_bo_vm_ops = {