Messages in this thread Patch in this message |  | | From | Lance Roy <> | Subject | [PATCH 13/16] mm: Replace spin_is_locked() with lockdep | Date | Tue, 2 Oct 2018 22:38:59 -0700 |
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lockdep_assert_held() is better suited to checking locking requirements, since it won't get confused when someone else holds the lock. This is also a step towards possibly removing spin_is_locked().
Signed-off-by: Lance Roy <ldr709@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Yang Shi <yang.shi@linux.alibaba.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Jan Kara <jack@suse.cz> Cc: Shakeel Butt <shakeelb@google.com> Cc: <linux-mm@kvack.org> --- mm/khugepaged.c | 4 ++-- mm/swap.c | 3 +-- 2 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index a31d740e6cd1..80f12467ccb3 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1225,7 +1225,7 @@ static void collect_mm_slot(struct mm_slot *mm_slot) { struct mm_struct *mm = mm_slot->mm; - VM_BUG_ON(NR_CPUS != 1 && !spin_is_locked(&khugepaged_mm_lock)); + lockdep_assert_held(&khugepaged_mm_lock); if (khugepaged_test_exit(mm)) { /* free mm_slot */ @@ -1665,7 +1665,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int progress = 0; VM_BUG_ON(!pages); - VM_BUG_ON(NR_CPUS != 1 && !spin_is_locked(&khugepaged_mm_lock)); + lockdep_assert_held(&khugepaged_mm_lock); if (khugepaged_scan.mm_slot) mm_slot = khugepaged_scan.mm_slot; diff --git a/mm/swap.c b/mm/swap.c index 26fc9b5f1b6c..c89eb442c0bf 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -824,8 +824,7 @@ void lru_add_page_tail(struct page *page, struct page *page_tail, VM_BUG_ON_PAGE(!PageHead(page), page); VM_BUG_ON_PAGE(PageCompound(page_tail), page); VM_BUG_ON_PAGE(PageLRU(page_tail), page); - VM_BUG_ON(NR_CPUS != 1 && - !spin_is_locked(&lruvec_pgdat(lruvec)->lru_lock)); + lockdep_assert_held(&lruvec_pgdat(lruvec)->lru_lock); if (!list) SetPageLRU(page_tail); -- 2.19.0
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