[tip: core/rcu] rcu/tiny: support vmalloc in tiny-RCU

[tip: core/rcu] rcu/tiny: support vmalloc in tiny-RCU

[tip-bot2 for Uladzislau Rezki (Sony)]

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     64d1d06ccb1b7de245ccf781b91517f328bebd9f
Gitweb:        https://git.kernel.org/tip/64d1d06ccb1b7de245ccf781b91517f328bebd9f
Author:        Uladzislau Rezki (Sony) <urezki@gmail.com>
AuthorDate:    Mon, 25 May 2020 23:47:54 +02:00
Committer:     Paul E. McKenney <paulmck@kernel.org>
CommitterDate: Mon, 29 Jun 2020 11:59:25 -07:00

rcu/tiny: support vmalloc in tiny-RCU

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>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 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 dd572ce..4b99f7b 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;
 	}