From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Fri, 11 Sep 2020 01:36:17 +0000 (-0400)
Subject: kernel/fork: Use mas_dup_store for quicker forking
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=680165e374f6095ff79b9c50bd6e96c1045a4cfd;p=users%2Fjedix%2Flinux-maple.git

kernel/fork: Use mas_dup_store for quicker forking

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---

diff --git a/kernel/fork.c b/kernel/fork.c
index 72fdd9f79215..5ac38d69d178 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -509,6 +509,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
 	rcu_read_lock();
 	mas_dup_tree(&old_mas, &mas);
 	mas_reset(&old_mas);
+	mas_reset(&mas);
 
 	mas_for_each(&old_mas, mpnt, ULONG_MAX) {
 		struct file *file;
@@ -592,7 +593,8 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
 		prev = tmp;
 
 		/* Link the vma into the MT */
-		vma_store(mm, tmp);
+		//vma_store(mm, tmp);
+		mas_dup_store(&mas, tmp);
 
 		mm->map_count++;
 		if (!(tmp->vm_flags & VM_WIPEONFORK))