mm/hwpoison: remove unneeded variable unmap_success

Patch series "Cleanups and fixup for hwpoison"

This series contains cleanups to remove unneeded variable, fix some
obsolete comments and so on.  Also we fix potential pte_unmap_unlock on
wrong pte.  More details can be found in the respective changelogs.

This patch (of 4):

unmap_success is used to indicate whether page is successfully unmapped
but it's irrelated with ZONE_DEVICE page and unmap_success is always true
here.  Remove this unneeded one.

Link: https://lkml.kernel.org/r/20210814105131.48814-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20210814105131.48814-2-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 470400c..9793c78 100644 (file)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1518,7 +1518,6 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags,
                struct dev_pagemap *pgmap)
 {
        struct page *page = pfn_to_page(pfn);
-       const bool unmap_success = true;
        unsigned long size = 0;
        struct to_kill *tk;
        LIST_HEAD(tokill);
@@ -1590,7 +1589,7 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags,
                start = (page->index << PAGE_SHIFT) & ~(size - 1);
                unmap_mapping_range(page->mapping, start, size, 0);
        }
-       kill_procs(&tokill, flags & MF_MUST_KILL, !unmap_success, pfn, flags);
+       kill_procs(&tokill, flags & MF_MUST_KILL, false, pfn, flags);
        rc = 0;
 unlock:
        dax_unlock_page(page, cookie);