[PATCHv1 3/4] spinlock: shrink struct lock_debug

From: David Vrabel <david.vrabel@citrix.com>
To: xen-devel@lists.xenproject.org
Cc: Jennifer Herbert <jennifer.herbert@citrix.com>,
	David Vrabel <david.vrabel@citrix.com>,
	Jan Beulich <jbeulich@suse.com>,
	Ian Campbell <ian.campbell@citrix.com>
Subject: [PATCHv1 3/4] spinlock: shrink struct lock_debug
Date: Fri, 18 Dec 2015 14:09:05 +0000	[thread overview]
Message-ID: <1450447746-9305-4-git-send-email-david.vrabel@citrix.com> (raw)
In-Reply-To: <1450447746-9305-1-git-send-email-david.vrabel@citrix.com>

From: Jennifer Herbert <jennifer.herbert@citrix.com>

Reduce the size of struct lock_debug so increases in other lock
structures don't increase the size of struct domain too much.

Signed-off-by: Jennifer Herbert <jennifer.herbert@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 xen/common/spinlock.c      | 2 +-
 xen/include/xen/spinlock.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/common/spinlock.c b/xen/common/spinlock.c
index 7f89694..c129a88 100644
--- a/xen/common/spinlock.c
+++ b/xen/common/spinlock.c
@@ -16,7 +16,7 @@ static atomic_t spin_debug __read_mostly = ATOMIC_INIT(0);
 
 static void check_lock(struct lock_debug *debug)
 {
-    int irq_safe = !local_irq_is_enabled();
+    s16 irq_safe = !local_irq_is_enabled();
 
     if ( unlikely(atomic_read(&spin_debug) <= 0) )
         return;
diff --git a/xen/include/xen/spinlock.h b/xen/include/xen/spinlock.h
index fb0438e..5e54407 100644
--- a/xen/include/xen/spinlock.h
+++ b/xen/include/xen/spinlock.h
@@ -6,7 +6,7 @@
 
 #ifndef NDEBUG
 struct lock_debug {
-    int irq_safe; /* +1: IRQ-safe; 0: not IRQ-safe; -1: don't know yet */
+    s16 irq_safe; /* +1: IRQ-safe; 0: not IRQ-safe; -1: don't know yet */
 };
 #define _LOCK_DEBUG { -1 }
 void spin_debug_enable(void);
-- 
2.1.4
