[PATCH v2 10/16] rcu/tiny: support vmalloc in tiny-RCU

From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>, linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
	"Paul E . McKenney" <paulmck@kernel.org>,
	"Theodore Y . Ts'o" <tytso@mit.edu>,
	Matthew Wilcox <willy@infradead.org>,
	Joel Fernandes <joel@joelfernandes.org>,
	RCU <rcu@vger.kernel.org>, Uladzislau Rezki <urezki@gmail.com>,
	Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Subject: [PATCH v2 10/16] rcu/tiny: support vmalloc in tiny-RCU
Date: Mon, 25 May 2020 23:47:54 +0200	[thread overview]
Message-ID: <20200525214800.93072-11-urezki@gmail.com> (raw)
In-Reply-To: <20200525214800.93072-1-urezki@gmail.com>

Replace kfree() with kvfree() in rcu_reclaim_tiny().
This makes it possible to release either SLAB or vmalloc
objects after a GP.

Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
 kernel/rcu/tiny.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c
index dd572ce7c747..4b99f7b88bee 100644
--- a/kernel/rcu/tiny.c
+++ b/kernel/rcu/tiny.c
@@ -23,6 +23,7 @@
 #include <linux/cpu.h>
 #include <linux/prefetch.h>
 #include <linux/slab.h>
+#include <linux/mm.h>
 
 #include "rcu.h"
 
@@ -86,7 +87,7 @@ static inline bool rcu_reclaim_tiny(struct rcu_head *head)
 	rcu_lock_acquire(&rcu_callback_map);
 	if (__is_kfree_rcu_offset(offset)) {
 		trace_rcu_invoke_kfree_callback("", head, offset);
-		kfree((void *)head - offset);
+		kvfree((void *)head - offset);
 		rcu_lock_release(&rcu_callback_map);
 		return true;
 	}
-- 
2.20.1


