The patch titled
Subject: mm/memory.c:do_shared_fault(): add comment
has been removed from the -mm tree. Its filename was
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm/memory.c:do_shared_fault(): add comment
Belatedly document the changes in f0c6d4d295e4ea ("mm: introduce
do_shared_fault() and drop do_fault()").
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Bob Liu <lliubbo@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Sasha Levin <sasha.levin@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 6 ++++++
1 file changed, 6 insertions(+)
diff -puN mm/memory.c~mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix mm/memory.c
--- a/mm/memory.c~mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix
+++ a/mm/memory.c
@@ -2996,6 +2996,12 @@ static int do_shared_fault(struct mm_str
if (set_page_dirty(fault_page))
dirtied = 1;
+ /*
+ * Take a local copy of the address_space - page.mapping may be zeroed
+ * by truncate after unlock_page(). The address_space itself remains
+ * pinned by vma->vm_file's reference. We rely on unlock_page()'s
+ * release semantics to prevent the compiler from undoing this copying.
+ */
mapping = fault_page->mapping;
unlock_page(fault_page);
if ((dirtied || vma->vm_ops->page_mkwrite) && mapping) {
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
mm-prevent-endless-growth-of-anon_vma-hierarchy-fix.patch
mm-page_allocc-__alloc_pages_nodemask-dont-alter-arg-gfp_mask.patch
input-route-kbd-leds-through-the-generic-leds-layer.patch
o2dlm-fix-null-pointer-dereference-in-o2dlm_blocking_ast_wrapper.patch
ocfs2-add-functions-to-add-and-remove-inode-in-orphan-dir.patch
mm.patch
mm-replace-remap_file_pages-syscall-with-emulation.patch
x86-add-pmd_-for-thp-fix.patch
sparc-add-pmd_-for-thp-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
task_mmu-add-user-space-support-for-resetting-mm-hiwater_rss-peak-rss-fix.patch
lib-bitmap-update-bitmap_onto-to-unsigned-checkpatch-fixes.patch
linux-next.patch
linux-next-git-rejects.patch
drivers-gpio-gpio-zevioc-fix-build.patch
journal_add_journal_head-debug.patch
journal_add_journal_head-debug-fix.patch
kernel-forkc-export-kernel_thread-to-modules.patch
mutex-subsystem-synchro-test-module.patch
slab-leaks3-default-y.patch
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