rqspinlock: Add rqspinlock.h header

This header contains the public declarations usable in the rest of the
kernel for rqspinlock.

Let's also type alias qspinlock to rqspinlock_t to ensure consistent use
of the new lock type. We want to remove dependence on the qspinlock type
in later patches as we need to provide a test-and-set fallback, hence
begin abstracting away from now onwards.

Reviewed-by: Barret Rhoden <brho@google.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20250316040541.108729-6-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/kernel/bpf/rqspinlock.c b/kernel/bpf/rqspinlock.c
index 762108cb0f38..93e31633c2aa 100644
--- a/kernel/bpf/rqspinlock.c
+++ b/kernel/bpf/rqspinlock.c
@@ -23,6 +23,7 @@
 #include <asm/byteorder.h>
 #include <asm/qspinlock.h>
 #include <trace/events/lock.h>
+#include <asm/rqspinlock.h>
 
 /*
  * Include queued spinlock definitions and statistics code
@@ -127,7 +128,7 @@ static __always_inline u32  __pv_wait_head_or_lock(struct qspinlock *lock,
  * contended             :    (*,x,y) +--> (*,0,0) ---> (*,0,1) -'  :
  *   queue               :         ^--'                             :
  */
-void __lockfunc resilient_queued_spin_lock_slowpath(struct qspinlock *lock, u32 val)
+void __lockfunc resilient_queued_spin_lock_slowpath(rqspinlock_t *lock, u32 val)
 {
 	struct mcs_spinlock *prev, *next, *node;
 	u32 old, tail;