From 4958e4d86ecb011a81f5d80ce2023ef9f10692d8 Mon Sep 17 00:00:00 2001 From: Yang Shi Date: Tue, 11 Aug 2020 18:31:48 -0700 Subject: mm: thp: remove debug_cow switch Since commit 3917c80280c93a7123f ("thp: change CoW semantics for anon-THP"), the CoW page fault of THP has been rewritten, debug_cow is not used anymore. So, just remove it. Signed-off-by: Yang Shi Signed-off-by: Andrew Morton Reviewed-by: Zi Yan Cc: Kirill A. Shutemov Link: http://lkml.kernel.org/r/1592270980-116062-1-git-send-email-yang.shi@linux.alibaba.com Signed-off-by: Linus Torvalds --- mm/huge_memory.c | 21 --------------------- 1 file changed, 21 deletions(-) (limited to 'mm/huge_memory.c') diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 863c495776d7..2ccff8472cd4 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -303,24 +303,6 @@ static ssize_t hpage_pmd_size_show(struct kobject *kobj, static struct kobj_attribute hpage_pmd_size_attr = __ATTR_RO(hpage_pmd_size); -#ifdef CONFIG_DEBUG_VM -static ssize_t debug_cow_show(struct kobject *kobj, - struct kobj_attribute *attr, char *buf) -{ - return single_hugepage_flag_show(kobj, attr, buf, - TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG); -} -static ssize_t debug_cow_store(struct kobject *kobj, - struct kobj_attribute *attr, - const char *buf, size_t count) -{ - return single_hugepage_flag_store(kobj, attr, buf, count, - TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG); -} -static struct kobj_attribute debug_cow_attr = - __ATTR(debug_cow, 0644, debug_cow_show, debug_cow_store); -#endif /* CONFIG_DEBUG_VM */ - static struct attribute *hugepage_attr[] = { &enabled_attr.attr, &defrag_attr.attr, @@ -328,9 +310,6 @@ static struct attribute *hugepage_attr[] = { &hpage_pmd_size_attr.attr, #ifdef CONFIG_SHMEM &shmem_enabled_attr.attr, -#endif -#ifdef CONFIG_DEBUG_VM - &debug_cow_attr.attr, #endif NULL, }; -- cgit