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authorDavid Hildenbrand <david@redhat.com>2022-10-21 12:11:35 +0200
committerAndrew Morton <akpm@linux-foundation.org>2022-12-12 03:12:08 +0100
commitcb8d863313436339fb60f7dd5131af2e5854621e (patch)
treef6509e62179dbbf1a739c78bd050da8bdbac0eb9 /mm/memory.c
parentmm/ksm: simplify break_ksm() to not rely on VM_FAULT_WRITE (diff)
downloadlinux-cb8d863313436339fb60f7dd5131af2e5854621e.tar.xz
linux-cb8d863313436339fb60f7dd5131af2e5854621e.zip
mm: remove VM_FAULT_WRITE
All users -- GUP and KSM -- are gone, let's just remove it. Link: https://lkml.kernel.org/r/20221021101141.84170-4-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Peter Xu <peterx@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r--mm/memory.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 815d2ff05c62..aad226daf41b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3213,7 +3213,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
}
delayacct_wpcopy_end();
- return (page_copied && !unshare) ? VM_FAULT_WRITE : 0;
+ return 0;
oom_free_new:
put_page(new_page);
oom:
@@ -3277,14 +3277,14 @@ static vm_fault_t wp_pfn_shared(struct vm_fault *vmf)
return finish_mkwrite_fault(vmf);
}
wp_page_reuse(vmf);
- return VM_FAULT_WRITE;
+ return 0;
}
static vm_fault_t wp_page_shared(struct vm_fault *vmf)
__releases(vmf->ptl)
{
struct vm_area_struct *vma = vmf->vma;
- vm_fault_t ret = VM_FAULT_WRITE;
+ vm_fault_t ret = 0;
get_page(vmf->page);
@@ -3430,7 +3430,7 @@ reuse:
return 0;
}
wp_page_reuse(vmf);
- return VM_FAULT_WRITE;
+ return 0;
}
copy:
/*
@@ -3944,7 +3944,6 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
if (vmf->flags & FAULT_FLAG_WRITE) {
pte = maybe_mkwrite(pte_mkdirty(pte), vma);
vmf->flags &= ~FAULT_FLAG_WRITE;
- ret |= VM_FAULT_WRITE;
}
rmap_flags |= RMAP_EXCLUSIVE;
}