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authorSouptick Joarder <jrdr.linux@gmail.com>2018-06-07 17:08:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-07 17:34:36 -0700
commit2bcd6454bae78775632e1848ce1eabf65c6fbd4f (patch)
tree2c474c3ee60bbfc0fb3b6f210c317bb4ce952ef4
parenta380b40abbcecda28037b712fc437e157a1e9b57 (diff)
downloadlinux-2bcd6454bae78775632e1848ce1eabf65c6fbd4f.tar.bz2
mm: use new return type vm_fault_t
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 <jrdr.linux@gmail.com> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Rik van Riel <riel@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Hugh Dickins <hughd@google.com> Cc: Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/mm.h4
-rw-r--r--mm/filemap.c8
-rw-r--r--mm/nommu.c2
3 files changed, 7 insertions, 7 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index b7012bb1d218..d1dc618a56bf 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2303,10 +2303,10 @@ extern void truncate_inode_pages_range(struct address_space *,
extern void truncate_inode_pages_final(struct address_space *);
/* generic vm_area_ops exported for stackable file systems */
-extern int filemap_fault(struct vm_fault *vmf);
+extern vm_fault_t filemap_fault(struct vm_fault *vmf);
extern void filemap_map_pages(struct vm_fault *vmf,
pgoff_t start_pgoff, pgoff_t end_pgoff);
-extern int filemap_page_mkwrite(struct vm_fault *vmf);
+extern vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf);
/* mm/page-writeback.c */
int __must_check write_one_page(struct page *page);
diff --git a/mm/filemap.c b/mm/filemap.c
index 0604cb02e6f3..52517f28e6f4 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -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);
diff --git a/mm/nommu.c b/mm/nommu.c
index 13723736d38f..4452d8bd9ae4 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1763,7 +1763,7 @@ unsigned long arch_get_unmapped_area(struct file *file, unsigned long addr,
return -ENOMEM;
}
-int filemap_fault(struct vm_fault *vmf)
+vm_fault_t filemap_fault(struct vm_fault *vmf)
{
BUG();
return 0;