The patch titled
Subject: mm/migrate.c: clean up useless code in migrate_vma_collect_pmd()
has been added to the -mm tree. Its filename is
mm-migrate-clean-up-useless-code-in-migrate_vma_collect_pmd.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-migrate-clean-up-useless-code-in-migrate_vma_collect_pmd.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-migrate-clean-up-useless-code-in-migrate_vma_collect_pmd.patch
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------------------------------------------------------
From: Pingfan Liu <kernelfans@xxxxxxxxx>
Subject: mm/migrate.c: clean up useless code in migrate_vma_collect_pmd()
Remove unused 'pfn' variable.
Link: http://lkml.kernel.org/r/1565167272-21453-1-git-send-email-kernelfans@xxxxxxxxx
Signed-off-by: Pingfan Liu <kernelfans@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: "Jérôme Glisse" <jglisse@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
--- a/mm/migrate.c~mm-migrate-clean-up-useless-code-in-migrate_vma_collect_pmd
+++ a/mm/migrate.c
@@ -2227,17 +2227,15 @@ again:
pte_t pte;
pte = *ptep;
- pfn = pte_pfn(pte);
if (pte_none(pte)) {
mpfn = MIGRATE_PFN_MIGRATE;
migrate->cpages++;
- pfn = 0;
goto next;
}
if (!pte_present(pte)) {
- mpfn = pfn = 0;
+ mpfn = 0;
/*
* Only care about unaddressable device page special
@@ -2254,10 +2252,10 @@ again:
if (is_write_device_private_entry(entry))
mpfn |= MIGRATE_PFN_WRITE;
} else {
+ pfn = pte_pfn(pte);
if (is_zero_pfn(pfn)) {
mpfn = MIGRATE_PFN_MIGRATE;
migrate->cpages++;
- pfn = 0;
goto next;
}
page = vm_normal_page(migrate->vma, addr, pte);
@@ -2267,10 +2265,9 @@ again:
/* FIXME support THP */
if (!page || !page->mapping || PageTransCompound(page)) {
- mpfn = pfn = 0;
+ mpfn = 0;
goto next;
}
- pfn = page_to_pfn(page);
/*
* By getting a reference on the page we pin it and that blocks
_
Patches currently in -mm which might be from kernelfans@xxxxxxxxx are
mm-migrate-clean-up-useless-code-in-migrate_vma_collect_pmd.patch
