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Diffstat (limited to 'kernel/rcutree.h')
-rw-r--r--kernel/rcutree.h33
1 files changed, 18 insertions, 15 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index d9d032abd665..7495fed49c30 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -92,10 +92,10 @@ struct rcu_dynticks {
struct rcu_node {
spinlock_t lock; /* Root rcu_node's lock protects some */
/* rcu_state fields as well as following. */
- long gpnum; /* Current grace period for this node. */
+ unsigned long gpnum; /* Current grace period for this node. */
/* This will either be equal to or one */
/* behind the root rcu_node's gpnum. */
- long completed; /* Last grace period completed for this node. */
+ unsigned long completed; /* Last GP completed for this node. */
/* This will either be equal to or one */
/* behind the root rcu_node's gpnum. */
unsigned long qsmask; /* CPUs or groups that need to switch in */
@@ -161,11 +161,11 @@ struct rcu_node {
/* Per-CPU data for read-copy update. */
struct rcu_data {
/* 1) quiescent-state and grace-period handling : */
- long completed; /* Track rsp->completed gp number */
+ unsigned long completed; /* Track rsp->completed gp number */
/* in order to detect GP end. */
- long gpnum; /* Highest gp number that this CPU */
+ unsigned long gpnum; /* Highest gp number that this CPU */
/* is aware of having started. */
- long passed_quiesc_completed;
+ unsigned long passed_quiesc_completed;
/* Value of completed at time of qs. */
bool passed_quiesc; /* User-mode/idle loop etc. */
bool qs_pending; /* Core waits for quiesc state. */
@@ -221,14 +221,14 @@ struct rcu_data {
unsigned long resched_ipi; /* Sent a resched IPI. */
/* 5) __rcu_pending() statistics. */
- long n_rcu_pending; /* rcu_pending() calls since boot. */
- long n_rp_qs_pending;
- long n_rp_cb_ready;
- long n_rp_cpu_needs_gp;
- long n_rp_gp_completed;
- long n_rp_gp_started;
- long n_rp_need_fqs;
- long n_rp_need_nothing;
+ unsigned long n_rcu_pending; /* rcu_pending() calls since boot. */
+ unsigned long n_rp_qs_pending;
+ unsigned long n_rp_cb_ready;
+ unsigned long n_rp_cpu_needs_gp;
+ unsigned long n_rp_gp_completed;
+ unsigned long n_rp_gp_started;
+ unsigned long n_rp_need_fqs;
+ unsigned long n_rp_need_nothing;
int cpu;
};
@@ -255,6 +255,9 @@ struct rcu_data {
#endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
+#define ULONG_CMP_GE(a, b) (ULONG_MAX / 2 >= (a) - (b))
+#define ULONG_CMP_LT(a, b) (ULONG_MAX / 2 < (a) - (b))
+
/*
* RCU global state, including node hierarchy. This hierarchy is
* represented in "heap" form in a dense array. The root (first level)
@@ -283,8 +286,8 @@ struct rcu_state {
/* period because */
/* force_quiescent_state() */
/* was running. */
- long gpnum; /* Current gp number. */
- long completed; /* # of last completed gp. */
+ unsigned long gpnum; /* Current gp number. */
+ unsigned long completed; /* # of last completed gp. */
/* End of fields guarded by root rcu_node's lock. */