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Re: [PATCH v4 07/12] xen/spinlock: add explicit non-recursive locking functions
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Thu, 29 Feb 2024 14:56:33 +0100
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- Delivery-date: Thu, 29 Feb 2024 13:56:42 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 29.02.24 14:49, Jan Beulich wrote:
On 12.12.2023 10:47, Juergen Gross wrote:
In order to prepare a type-safe recursive spinlock structure, add
explicitly non-recursive locking functions to be used for non-recursive
locking of spinlocks, which are used recursively, too.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
preferably with ...
--- a/xen/include/xen/spinlock.h
+++ b/xen/include/xen/spinlock.h
@@ -101,6 +101,8 @@ struct lock_profile_qhead {
};
#define _LOCK_PROFILE(lockname) { .name = #lockname, .lock = &lockname, }
+#define _RLOCK_PROFILE(lockname) { .name = #lockname, .rlock = &lockname, \
+ .is_rlock = 1, }
... "true" used here, ...
@@ -133,13 +135,16 @@ struct lock_profile_qhead {
break;
\
}
\
prof->name = #l;
\
- prof->lock = &(s)->l; \
+ prof->lockptr = &(s)->l; \
+ prof->is_rlock = isr; \
prof->next = (s)->profile_head.elem_q;
\
(s)->profile_head.elem_q = prof;
\
} while( 0 )
-#define spin_lock_init_prof(s, l) __spin_lock_init_prof(s, l, spinlock_t)
-#define rspin_lock_init_prof(s, l) __spin_lock_init_prof(s, l, rspinlock_t)
+#define spin_lock_init_prof(s, l) \
+ __spin_lock_init_prof(s, l, lock, spinlock_t, 0)
... "false" here, ...
+#define rspin_lock_init_prof(s, l) \
+ __spin_lock_init_prof(s, l, rlock, rspinlock_t, 1)
... "true" again here, and ...
@@ -174,6 +179,7 @@ struct lock_profile_qhead { };
#endif
+
typedef union {
uint32_t head_tail;
struct {
... definitely with this hunk dropped.
I'm fine with all of above.
Juergen
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