Re: [PATCH next 1/5] locking/osq_lock: Move the definition of optimistic_spin_node into osf_lock.c

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On 12/29/23 15:53, David Laight wrote:
struct optimistic_spin_node is private to the implementation.
Move it into the C file to ensure nothing is accessing it.

Signed-off-by: David Laight <david.laight@xxxxxxxxxx>
---
  include/linux/osq_lock.h  | 5 -----
  kernel/locking/osq_lock.c | 7 +++++++
  2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/include/linux/osq_lock.h b/include/linux/osq_lock.h
index 5581dbd3bd34..ea8fb31379e3 100644
--- a/include/linux/osq_lock.h
+++ b/include/linux/osq_lock.h
@@ -6,11 +6,6 @@
   * An MCS like lock especially tailored for optimistic spinning for sleeping
   * lock implementations (mutex, rwsem, etc).
   */
-struct optimistic_spin_node {
-	struct optimistic_spin_node *next, *prev;
-	int locked; /* 1 if lock acquired */
-	int cpu; /* encoded CPU # + 1 value */
-};
struct optimistic_spin_queue {
  	/*
diff --git a/kernel/locking/osq_lock.c b/kernel/locking/osq_lock.c
index d5610ad52b92..d414eef4bec6 100644
--- a/kernel/locking/osq_lock.c
+++ b/kernel/locking/osq_lock.c
@@ -11,6 +11,13 @@
   * called from interrupt context and we have preemption disabled while
   * spinning.
   */
+
+struct optimistic_spin_node {
+	struct optimistic_spin_node *next, *prev;
+	int locked; /* 1 if lock acquired */
+	int cpu; /* encoded CPU # + 1 value */
+};
+
  static DEFINE_PER_CPU_SHARED_ALIGNED(struct optimistic_spin_node, osq_node);
/*

Please correct the patch title "osf_lock.c" => "osq_lock.c".

After the fix, you can add

Acked-by: Waiman Long <longman@xxxxxxxxxx>





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