From: Souptick Joarder <jrdr.linux@xxxxxxxxx>
Subject: mm/shmem.c: use new return type 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.
Ref-> 1c8f422059ae ("mm: change return type to vm_fault_t")
vmf_error() is the newly introduce inline function in 4.17-rc6.
Link: http://lkml.kernel.org/r/20180521202410.GA17912@jordon-HP-15-Notebook-PC
Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx>
Reviewed-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/shmem.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff -puN mm/shmem.c~mm-shmem-adding-new-return-type-vm_fault_t mm/shmem.c
--- a/mm/shmem.c~mm-shmem-adding-new-return-type-vm_fault_t
+++ a/mm/shmem.c
@@ -1947,14 +1947,14 @@ static int synchronous_wake_function(wai
return ret;
}
-static int shmem_fault(struct vm_fault *vmf)
+static vm_fault_t shmem_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct inode *inode = file_inode(vma->vm_file);
gfp_t gfp = mapping_gfp_mask(inode->i_mapping);
enum sgp_type sgp;
- int error;
- int ret = VM_FAULT_LOCKED;
+ int err;
+ vm_fault_t ret = VM_FAULT_LOCKED;
/*
* Trinity finds that probing a hole which tmpfs is punching can
@@ -2022,10 +2022,10 @@ static int shmem_fault(struct vm_fault *
else if (vma->vm_flags & VM_HUGEPAGE)
sgp = SGP_HUGE;
- error = shmem_getpage_gfp(inode, vmf->pgoff, &vmf->page, sgp,
+ err = shmem_getpage_gfp(inode, vmf->pgoff, &vmf->page, sgp,
gfp, vma, vmf, &ret);
- if (error)
- return ((error == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS);
+ if (err)
+ return vmf_error(err);
return ret;
}
_
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