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mm: use new return type vm_fault_t

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Use new return type vm_fault_t for fault handler in struct
vm_operations_struct.  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.

Link: http://lkml.kernel.org/r/20180511190542.GA2412@jordon-HP-15-Notebook-PC
Signed-off-by: Souptick Joarder <[email protected]>
Reviewed-by: Matthew Wilcox <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Pavel Tatashin <[email protected]>
Cc: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Souptick Joarder 2018-06-07 17:08:00 -07:00 • committed by Linus Torvalds
commit 2bcd6454ba
3 changed files with 7 additions and 7 deletions
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8
mm/filemap.c
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@ -2489,7 +2489,7 @@ static void do_async_mmap_readahead(struct vm_area_struct *vma,
*
* We never return with VM_FAULT_RETRY and a bit from VM_FAULT_ERROR set.
*/
int filemap_fault(struct vm_fault *vmf)
vm_fault_t filemap_fault(struct vm_fault *vmf)
{
int error;
struct file *file = vmf->vma->vm_file;
@ -2499,7 +2499,7 @@ int filemap_fault(struct vm_fault *vmf)
pgoff_t offset = vmf->pgoff;
pgoff_t max_off;
struct page *page;
int ret = 0;
vm_fault_t ret = 0;
max_off = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
if (unlikely(offset >= max_off))
@ -2693,11 +2693,11 @@ next:
}
EXPORT_SYMBOL(filemap_map_pages);
int filemap_page_mkwrite(struct vm_fault *vmf)
vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
{
struct page *page = vmf->page;
struct inode *inode = file_inode(vmf->vma->vm_file);
int ret = VM_FAULT_LOCKED;
vm_fault_t ret = VM_FAULT_LOCKED;
sb_start_pagefault(inode->i_sb);
file_update_time(vmf->vma->vm_file);