From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/lib/lockref.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/kernel/lib/lockref.c b/kernel/lib/lockref.c
index 3d468b5..81ac5f3 100644
--- a/kernel/lib/lockref.c
+++ b/kernel/lib/lockref.c
@@ -9,6 +9,7 @@
* failure case.
*/
#define CMPXCHG_LOOP(CODE, SUCCESS) do { \
+ int retry = 100; \
struct lockref old; \
BUILD_BUG_ON(sizeof(old) != 8); \
old.lock_count = READ_ONCE(lockref->lock_count); \
@@ -21,7 +22,8 @@
if (likely(old.lock_count == prev.lock_count)) { \
SUCCESS; \
} \
- cpu_relax(); \
+ if (!--retry) \
+ break; \
} \
} while (0)
--
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