[PATCH] xen/rwlock: Don't perpeuatite broken API in new logic

[Andrew Cooper <andrew.cooper3@citrix.com>]

The single user wants this the sane way around.  Write it as a normal static
inline just like rspin_lock().

Fixes: cc3e8df542ed ("xen/spinlock: add rspin_[un]lock_irq[save|restore]()")
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Juergen Gross <jgross@suse.com>
CC: George Dunlap <George.Dunlap@citrix.com>
CC: Jan Beulich <JBeulich@suse.com>
CC: Stefano Stabellini <sstabellini@kernel.org>
CC: Julien Grall <julien@xen.org>
---
 xen/drivers/char/console.c |  6 +-----
 xen/include/xen/spinlock.h | 14 ++++++++------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c
index ccd5f8cc149f..349ce2a50d96 100644
--- a/xen/drivers/char/console.c
+++ b/xen/drivers/char/console.c
@@ -1159,11 +1159,7 @@ void console_end_log_everything(void)
 
 unsigned long console_lock_recursive_irqsave(void)
 {
-    unsigned long flags;
-
-    rspin_lock_irqsave(&console_lock, flags);
-
-    return flags;
+    return rspin_lock_irqsave(&console_lock);
 }
 
 void console_unlock_recursive_irqrestore(unsigned long flags)
diff --git a/xen/include/xen/spinlock.h b/xen/include/xen/spinlock.h
index 593cba640ee6..f210aa77f581 100644
--- a/xen/include/xen/spinlock.h
+++ b/xen/include/xen/spinlock.h
@@ -278,12 +278,6 @@ static always_inline void spin_lock_if(bool condition, spinlock_t *l)
  */
 bool _rspin_trylock(rspinlock_t *lock);
 void _rspin_lock(rspinlock_t *lock);
-#define rspin_lock_irqsave(l, f)                                \
-    ({                                                          \
-        BUILD_BUG_ON(sizeof(f) != sizeof(unsigned long));       \
-        (f) = _rspin_lock_irqsave(l);                           \
-        block_lock_speculation();                               \
-    })
 unsigned long _rspin_lock_irqsave(rspinlock_t *lock);
 void _rspin_unlock(rspinlock_t *lock);
 void _rspin_unlock_irqrestore(rspinlock_t *lock, unsigned long flags);
@@ -294,6 +288,14 @@ static always_inline void rspin_lock(rspinlock_t *lock)
     block_lock_speculation();
 }
 
+static always_inline unsigned long rspin_lock_irqsave(rspinlock_t *lock)
+{
+    unsigned long flags = _rspin_lock_irqsave(lock);
+
+    block_lock_speculation();
+    return flags;
+}
+
 #define rspin_trylock(l)              lock_evaluate_nospec(_rspin_trylock(l))
 #define rspin_unlock(l)               _rspin_unlock(l)
 #define rspin_unlock_irqrestore(l, f) _rspin_unlock_irqrestore(l, f)

base-commit: d2276b86e5eb8dd2617d917f7b49cdd1f29ac299
-- 
2.30.2