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rcu: Refactor kvfree_call_rcu() and high-level helpers

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Currently a kvfree_call_rcu() takes an offset within a structure as
a second parameter, so a helper such as a kvfree_rcu_arg_2() has to
convert rcu_head and a freed ptr to an offset in order to pass it. That
leads to an extra conversion on macro entry.

Instead of converting, refactor the code in way that a pointer that has
to be freed is passed directly to the kvfree_call_rcu().

This patch does not make any functional change and is transparent to
all kvfree_rcu() users.

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)
2022-10-25 16:46:12 +02:00
committed by Paul E. McKenney
parent 1b929c02af
commit 04a522b7da
5 changed files with 24 additions and 33 deletions
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5
include/linux/rcupdate.h
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@@ -1011,8 +1011,7 @@ do { \
\
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))); \
kvfree_call_rcu(&((___p)->rhf), (void *) (___p)); \
} \
} while (0)
@@ -1021,7 +1020,7 @@ do { \
typeof(ptr) ___p = (ptr); \
\
if (___p) \
kvfree_call_rcu(NULL, (rcu_callback_t) (___p)); \
kvfree_call_rcu(NULL, (void *) (___p)); \
} while (0)
/*