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rcu: Eliminate the __kvfree_rcu() macro

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This commit open-codes the __kvfree_rcu() macro, thus saving a
few lines of code and improving readability.

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) 2020-11-20 12:49:17 +01:00 committed by Paul E. McKenney
parent 5130b8fd06
commit 5ea5d1ed57
1 changed files with 6 additions and 12 deletions
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18
include/linux/rcupdate.h
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@ -840,15 +840,6 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
*/
#define __is_kvfree_rcu_offset(offset) ((offset) < 4096)
/*
* Helper macro for kfree_rcu() to prevent argument-expansion eyestrain.
*/
#define __kvfree_rcu(head, offset) \
do { \
BUILD_BUG_ON(!__is_kvfree_rcu_offset(offset)); \
kvfree_call_rcu(head, (rcu_callback_t)(unsigned long)(offset)); \
} while (0)
/**
* kfree_rcu() - kfree an object after a grace period.
* @ptr: pointer to kfree for both single- and double-argument invocations.
@ -866,7 +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 __kvfree_rcu(). If this error is triggered, you can
* be generated in kvfree_rcu_arg_2(). 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.
*
@ -912,8 +903,11 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
do { \
typeof (ptr) ___p = (ptr); \
\
if (___p) \
__kvfree_rcu(&((___p)->rhf), offsetof(typeof(*(ptr)), rhf)); \
if (___p) { \
BUILD_BUG_ON(!__is_kvfree_rcu_offset(offsetof(typeof(*(ptr)), rhf))); \
kvfree_call_rcu(&((___p)->rhf), (rcu_callback_t)(unsigned long) \
(offsetof(typeof(*(ptr)), rhf))); \
} \
} while (0)
#define kvfree_rcu_arg_1(ptr) \