Unverified Commit 688d9c48 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!11566 v2 tracefs: Use generic inode RCU for synchronizing freeing 

Merge Pull Request from: @ci-robot 
 
PR sync from: Long Li <leo.lilong@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/VQZ4YLHVDIDSVGRB235Z7TB7O3YN2XN3/ 
 
https://gitee.com/src-openeuler/kernel/issues/IAOXYV 
 
Link:https://gitee.com/openeuler/kernel/pulls/11566

 

Reviewed-by: default avatarZhang Peng <zhangpeng362@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents 727569fa 1127d551

fs/tracefs/inode.c

+4 −6
Original line number Diff line number Diff line
@@ -53,15 +53,14 @@ static struct inode *tracefs_alloc_inode(struct super_block *sb) 
	return &ti->vfs_inode;

}



static void tracefs_free_inode_rcu(struct rcu_head *rcu)

static void tracefs_free_inode(struct inode *inode)

{

	struct tracefs_inode *ti;

	struct tracefs_inode *ti = get_tracefs(inode);



	ti = container_of(rcu, struct tracefs_inode, rcu);

	kmem_cache_free(tracefs_inode_cachep, ti);

}



static void tracefs_free_inode(struct inode *inode)

static void tracefs_destroy_inode(struct inode *inode)

{

	struct tracefs_inode *ti = get_tracefs(inode);

	unsigned long flags;
@@ -69,8 +68,6 @@ static void tracefs_free_inode(struct inode *inode) 
	spin_lock_irqsave(&tracefs_inode_lock, flags);

	list_del_rcu(&ti->list);

	spin_unlock_irqrestore(&tracefs_inode_lock, flags);



	call_rcu(&ti->rcu, tracefs_free_inode_rcu);

}



static ssize_t default_read_file(struct file *file, char __user *buf,
@@ -458,6 +455,7 @@ static int tracefs_drop_inode(struct inode *inode) 
static const struct super_operations tracefs_super_operations = {

	.alloc_inode    = tracefs_alloc_inode,

	.free_inode     = tracefs_free_inode,

	.destroy_inode  = tracefs_destroy_inode,

	.drop_inode     = tracefs_drop_inode,

	.statfs		= simple_statfs,

	.remount_fs	= tracefs_remount,

fs/tracefs/internal.h

+1 −4
Original line number Diff line number Diff line
@@ -10,10 +10,7 @@ enum { 
};



struct tracefs_inode {

	union {

	struct inode            vfs_inode;

		struct rcu_head		rcu;

	};

	/* The below gets initialized with memset_after(ti, 0, vfs_inode) */

	struct list_head	list;

	unsigned long           flags;