[PATCH 15/24] rcu: Rename kfree_call_rcu() to the kvfree_call_rcu().

Uladzislau Rezki (Sony)
2020-04-28T21:00:03Z

The reason is, it is capable of freeing vmalloc()
memory now.

Do the same with __kfree_rcu() macro, it becomes
__kvfree_rcu(), the reason is the same as pointed
above.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
include/linux/rcupdate.h | 8 ++++----
include/linux/rcutiny.h | 2 +-
include/linux/rcutree.h | 2 +-
kernel/rcu/tree.c | 6 +++---
4 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 1d25e6c23ebd..b344fc800a9b 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -835,10 +835,10 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
/*
* Helper macro for kfree_rcu() to prevent argument-expansion eyestrain.
*/
-#define __kfree_rcu(head, offset) \
+#define __kvfree_rcu(head, offset) \
do { \
BUILD_BUG_ON(!__is_kvfree_rcu_offset(offset)); \
- kfree_call_rcu(head, (rcu_callback_t)(unsigned long)(offset)); \
+ kvfree_call_rcu(head, (rcu_callback_t)(unsigned long)(offset)); \
} while (0)

/**
@@ -857,7 +857,7 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
* Because the functions are not allowed in the low-order 4096 bytes of
* kernel virtual memory, offsets up to 4095 bytes can be accommodated.
* If the offset is larger than 4095 bytes, a compile-time error will
- * be generated in __kfree_rcu(). If this error is triggered, you can
+ * be generated in __kvfree_rcu(). If this error is triggered, you can
* either fall back to use of call_rcu() or rearrange the structure to
* position the rcu_head structure into the first 4096 bytes.
*
@@ -872,7 +872,7 @@ do { \
typeof (ptr) ___p = (ptr); \
\
if (___p) \
- __kfree_rcu(&((___p)->rhf), offsetof(typeof(*(ptr)), rhf)); \
+ __kvfree_rcu(&((___p)->rhf), offsetof(typeof(*(ptr)), rhf)); \
} while (0)

/*
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 3465ba704a11..0c6315c4a0fe 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -34,7 +34,7 @@ static inline void synchronize_rcu_expedited(void)
synchronize_rcu();
}

-static inline void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
+static inline void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
{
call_rcu(head, func);
}
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index fbc26274af4d..4d2732442013 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -33,7 +33,7 @@ static inline void rcu_virt_note_context_switch(int cpu)
}

void synchronize_rcu_expedited(void);
-void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
+void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func);

void rcu_barrier(void);
bool rcu_eqs_special_set(int cpu);
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 5f53368f2554..51726e4c3b4d 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3251,12 +3251,12 @@ kvfree_call_rcu_add_ptr_to_bulk(struct kfree_rcu_cpu *krcp, void *ptr)
* one, that is used only when the main path can not be maintained temporary,
* due to memory pressure.
*
- * Each kfree_call_rcu() request is added to a batch. The batch will be drained
+ * Each kvfree_call_rcu() request is added to a batch. The batch will be drained
* every KFREE_DRAIN_JIFFIES number of jiffies. All the objects in the batch will
* be free'd in workqueue context. This allows us to: batch requests together to
* reduce the number of grace periods during heavy kfree_rcu()/kvfree_rcu() load.
*/
-void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
+void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
{
unsigned long flags;
struct kfree_rcu_cpu *krcp;
@@ -3295,7 +3295,7 @@ void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
unlock_return:
krc_this_cpu_unlock(krcp, flags);
}
-EXPORT_SYMBOL_GPL(kfree_call_rcu);
+EXPORT_SYMBOL_GPL(kvfree_call_rcu);

static unsigned long
kfree_rcu_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
--
2.20.1