mm: Change return type int to vm_fault_t for fault handlers
authorSouptick Joarder <jrdr.linux@gmail.com>
Fri, 24 Aug 2018 00:01:36 +0000 (17:01 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 24 Aug 2018 01:48:44 +0000 (18:48 -0700)
commit2b7403035459c75e193c6b04a293e518a4212de0
treed553df6f3c3cac0ae3a3de3a1fcc9f2729d01ea8
parenta99237afc12ba697159ca313525dc390737dd52f
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>
15 files changed:
fs/userfaultfd.c
include/linux/huge_mm.h
include/linux/hugetlb.h
include/linux/mm.h
include/linux/oom.h
include/linux/swapops.h
include/linux/userfaultfd_k.h
kernel/memremap.c
mm/gup.c
mm/huge_memory.c
mm/hugetlb.c
mm/internal.h
mm/khugepaged.c
mm/memory.c
mm/shmem.c