From 2b7403035459c75e193c6b04a293e518a4212de0 Mon Sep 17 00:00:00 2001
From: Souptick Joarder <jrdr.linux@gmail.com>
Date: Thu, 23 Aug 2018 17:01:36 -0700
Subject: mm: Change return type int to vm_fault_t for fault handlers
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-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
The aim is to change the return type of finish_fault() and
handle_mm_fault() to vm_fault_t type. As part of that clean up return
type of all other recursively called functions have been changed to
vm_fault_t type.
The places from where handle_mm_fault() is getting invoked will be
change to vm_fault_t type but in a separate patch.
vmf_error() is the newly introduce inline function in 4.17-rc6.
[akpm@linux-foundation.org: don't shadow outer local `ret' in __do_huge_pmd_anonymous_page()]
Link: http://lkml.kernel.org/r/20180604171727.GA20279@jordon-HP-15-Notebook-PC
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/userfaultfd.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
(limited to 'fs/userfaultfd.c')
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index f649023b19b5..bfa0ec69f924 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -340,17 +340,15 @@ out:
* fatal_signal_pending()s, and the mmap_sem must be released before
* returning it.
*/
-int handle_userfault(struct vm_fault *vmf, unsigned long reason)
+vm_fault_t handle_userfault(struct vm_fault *vmf, unsigned long reason)
{
struct mm_struct *mm = vmf->vma->vm_mm;
struct userfaultfd_ctx *ctx;
struct userfaultfd_wait_queue uwq;
- int ret;
+ vm_fault_t ret = VM_FAULT_SIGBUS;
bool must_wait, return_to_userland;
long blocking_state;
- ret = VM_FAULT_SIGBUS;
-
/*
* We don't do userfault handling for the final child pid update.
*
--
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