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rcu: Rename *_kfree_callback/*_kfree_rcu_offset/kfree_call_*

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The following changes are introduced:

1. Rename rcu_invoke_kfree_callback() to rcu_invoke_kvfree_callback(),
as well as the associated trace events, so the rcu_kfree_callback(),
becomes rcu_kvfree_callback(). The reason is to be aligned with kvfree()
notation.

2. Rename __is_kfree_rcu_offset to __is_kvfree_rcu_offset. All RCU
paths use kvfree() now instead of kfree(), thus rename it.

3. Rename kfree_call_rcu() to the kvfree_call_rcu(). The reason is,
it is capable of freeing vmalloc() memory now. Do the same with
__kfree_rcu() macro, it becomes __kvfree_rcu(), the goal is the
same.

Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Co-developed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-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>
This commit is contained in:
Uladzislau Rezki (Sony)
2020-05-25 23:47:55 +02:00
committed by Paul E. McKenney
parent 64d1d06ccb
commit c408b215f5
6 changed files with 23 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/linux/rcupdate.h
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@@ -828,17 +828,17 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
/*
* Does the specified offset indicate that the corresponding rcu_head
* structure can be handled by kfree_rcu()?
* structure can be handled by kvfree_rcu()?
*/
#define __is_kfree_rcu_offset(offset) ((offset) < 4096)
#define __is_kvfree_rcu_offset(offset) ((offset) < 4096)
/*
* 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_kfree_rcu_offset(offset)); \
kfree_call_rcu(head, (rcu_callback_t)(unsigned long)(offset)); \
BUILD_BUG_ON(!__is_kvfree_rcu_offset(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)
/*