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mm/hmm: convert to use vm_fault_t

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Convert to use vm_fault_t type as return type for fault handler.

kbuild reported warning during testing of
*mm-create-the-new-vm_fault_t-type.patch* available in below link -
https://patchwork.kernel.org/patch/10752741/

  kernel/memremap.c:46:34: warning: incorrect type in return expression
                           (different base types)
  kernel/memremap.c:46:34: expected restricted vm_fault_t
  kernel/memremap.c:46:34: got int

This patch has fixed the warnings and also hmm_devmem_fault() is
converted to return vm_fault_t to avoid further warnings.

[sfr@canb.auug.org.au: drm/nouveau/dmem: update for struct hmm_devmem_ops member change]
  Link: http://lkml.kernel.org/r/20190220174407.753d94e5@canb.auug.org.au
Link: http://lkml.kernel.org/r/20190110145900.GA1317@jordon-HP-15-Notebook-PC
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Souptick Joarder 2019-03-11 23:28:10 -07:00 committed by Linus Torvalds
parent 2bc4fc60fb
commit b57e622e6d
3 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/nouveau/nouveau_dmem.c
View File

@ -261,7 +261,7 @@ static const struct migrate_vma_ops nouveau_dmem_fault_migrate_ops = {
.finalize_and_map = nouveau_dmem_fault_finalize_and_map,
};
static int
static vm_fault_t
nouveau_dmem_fault(struct hmm_devmem *devmem,
struct vm_area_struct *vma,
unsigned long addr,

4
include/linux/hmm.h
View File

@ -468,7 +468,7 @@ struct hmm_devmem_ops {
* Note that mmap semaphore is held in read mode at least when this
* callback occurs, hence the vma is valid upon callback entry.
*/
int (*fault)(struct hmm_devmem *devmem,
vm_fault_t (*fault)(struct hmm_devmem *devmem,
struct vm_area_struct *vma,
unsigned long addr,
const struct page *page,
@ -511,7 +511,7 @@ struct hmm_devmem_ops {
* chunk, as an optimization. It must, however, prioritize the faulting address
* over all the others.
*/
typedef int (*dev_page_fault_t)(struct vm_area_struct *vma,
typedef vm_fault_t (*dev_page_fault_t)(struct vm_area_struct *vma,
unsigned long addr,
const struct page *page,
unsigned int flags,

2
mm/hmm.c
View File

@ -990,7 +990,7 @@ static void hmm_devmem_ref_kill(struct percpu_ref *ref)
percpu_ref_kill(ref);
}
static int hmm_devmem_fault(struct vm_area_struct *vma,
static vm_fault_t hmm_devmem_fault(struct vm_area_struct *vma,
unsigned long addr,
const struct page *page,
unsigned int flags,