The patch titled
Subject: mm/memory-failure.c: remove unneeded orig_head
has been added to the -mm tree. Its filename is
mm-memory-failurec-remove-unneeded-orig_head.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-memory-failurec-remove-unneeded-orig_head.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-memory-failurec-remove-unneeded-orig_head.patch
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/memory-failure.c: remove unneeded orig_head
orig_head is used to check whether the page have changed compound pages
during the locking. But it's always equal to hpage. So we can use hpage
directly and remove this redundant one.
Link: https://lkml.kernel.org/r/20220210141733.1908-5-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/memory-failure.c~mm-memory-failurec-remove-unneeded-orig_head
+++ a/mm/memory-failure.c
@@ -1687,7 +1687,6 @@ int memory_failure(unsigned long pfn, in
{
struct page *p;
struct page *hpage;
- struct page *orig_head;
struct dev_pagemap *pgmap;
int res = 0;
unsigned long page_flags;
@@ -1733,7 +1732,7 @@ try_again:
goto unlock_mutex;
}
- orig_head = hpage = compound_head(p);
+ hpage = compound_head(p);
num_poisoned_pages_inc();
/*
@@ -1817,7 +1816,7 @@ try_again:
* The page could have changed compound pages during the locking.
* If this happens just bail out.
*/
- if (PageCompound(p) && compound_head(p) != orig_head) {
+ if (PageCompound(p) && compound_head(p) != hpage) {
action_result(pfn, MF_MSG_DIFFERENT_COMPOUND, MF_IGNORED);
res = -EBUSY;
goto unlock_page;
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-memremap-avoid-calling-kasan_remove_zero_shadow-for-device-private-memory.patch
filemap-remove-find_get_pages.patch
mm-sparse-make-mminit_validate_memmodel_limits-static.patch
mm-vmalloc-remove-unneeded-function-forward-declaration.patch
mm-mmzoneh-remove-unused-macros.patch
mm-memory-failurec-minor-clean-up-for-memory_failure_dev_pagemap.patch
mm-memory-failurec-avoid-walking-page-table-when-vma_address-return-efault.patch
mm-memory-failurec-rework-the-signaling-logic-in-kill_proc.patch
mm-memory-failurec-remove-unneeded-orig_head.patch
mm-memory-failurec-remove-pageslab-check-in-hwpoison_filter_dev.patch
mm-memory-failurec-rework-the-try_to_unmap-logic-in-hwpoison_user_mappings.patch
mm-memory-failurec-remove-obsolete-comment-in-__soft_offline_page.patch
mm-memory-failurec-remove-unnecessary-pagetranstail-check.patch
mm-balloon_compaction-make-balloon-page-compaction-callbacks-static.patch
mm-memory_hotplug-remove-obsolete-comment-of-__add_pages.patch
mm-memory_hotplug-avoid-calling-zone_intersects-for-zone_normal.patch
mm-memory_hotplug-clean-up-try_offline_node.patch
mm-memory_hotplug-fix-misplaced-comment-in-offline_pages.patch
mm-highmem-remove-unnecessary-done-label.patch
mm-hmmc-remove-unneeded-local-variable-ret.patch
