From: Suren Baghdasaryan <surenb@google.com>
Date: Tue, 13 Dec 2022 15:14:38 +0000 (-0800)
Subject: align vma->lock
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a3dd55ef5c1746398d85142725c6b6355973ce6a;p=users%2Fjedix%2Flinux-maple.git

align vma->lock

Signed-off-by: Suren Baghdasaryan <surenb@google.com>
---

diff --git a/mm/memory.c b/mm/memory.c
index 59d1ef04be0d0..1f77d337677e5 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -5249,16 +5249,21 @@ EXPORT_SYMBOL_GPL(handle_mm_fault);
 
 #ifdef CONFIG_PER_VMA_LOCK
 
+static struct kmem_cache *vma_lock_cachep;
+
 void vma_lock_init(struct vm_area_struct *vma)
 {
-	vma->lock = kmalloc(sizeof(struct rw_semaphore), GFP_KERNEL);
+	if (!vma_lock_cachep)
+		vma_lock_cachep = KMEM_CACHE(rw_semaphore,
+				SLAB_PANIC|SLAB_ACCOUNT|SLAB_HWCACHE_ALIGN);
+	vma->lock = kmem_cache_alloc(vma_lock_cachep, GFP_KERNEL);
 	init_rwsem(vma->lock);
 	vma->vm_lock_seq = -1;
 }
 
 void vma_lock_free(struct vm_area_struct *vma)
 {
-	kfree(vma->lock);
+	kmem_cache_free(vma_lock_cachep, vma->lock);
 }
 
 /*