Commit dfee3a7b92208b30f77876068aece9ea571270c2(debug_core:
refactor locking for master/slave cpus) uses spin_lock to replace
the atomic counter lock mechanism, and most kgdb data was designed
to per-cpu, thus the 'smp_mb()' operation is useless here now.
Signed-off-by: Dongdong Deng <[email protected]>
---
kernel/debug/debug_core.c | 3 ---
1 files changed, 0 insertions(+), 3 deletions(-)
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index 722968f..1b019b5 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -492,9 +492,6 @@ acquirelock:
kgdb_info[cpu].ret_state = 0;
kgdb_info[cpu].irq_depth = hardirq_count() >> HARDIRQ_SHIFT;
- /* Make sure the above info reaches the primary CPU */
- smp_mb();
-
if (exception_level == 1) {
if (raw_spin_trylock(&dbg_master_lock))
atomic_xchg(&kgdb_active, cpu);
--
1.6.0.4