Members rcu_state::levelcnt[] and rcu_state::levelspread[] are only used at init. There is no reason to keep them afterwards.
Cc: "Paul E. McKenney" <[email protected]> Signed-off-by: Alexander Gordeev <[email protected]> --- kernel/rcu/tree.c | 29 ++++++++++++++++------------- kernel/rcu/tree.h | 2 -- 2 files changed, 16 insertions(+), 15 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 6856096..ccea2c7 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3735,16 +3735,16 @@ void rcu_scheduler_starting(void) * or balancing the tree, depending on CONFIG_RCU_FANOUT_EXACT. */ #ifdef CONFIG_RCU_FANOUT_EXACT -static void __init rcu_init_levelspread(struct rcu_state *rsp) +static void __init rcu_init_levelspread(int *levelspread, const int *levelcnt) { int i; - rsp->levelspread[rcu_num_lvls - 1] = rcu_fanout_leaf; + levelspread[rcu_num_lvls - 1] = rcu_fanout_leaf; for (i = rcu_num_lvls - 2; i >= 0; i--) - rsp->levelspread[i] = CONFIG_RCU_FANOUT; + levelspread[i] = CONFIG_RCU_FANOUT; } #else /* #ifdef CONFIG_RCU_FANOUT_EXACT */ -static void __init rcu_init_levelspread(struct rcu_state *rsp) +static void __init rcu_init_levelspread(int *levelspread, const int *levelcnt) { int ccur; int cprv; @@ -3752,8 +3752,8 @@ static void __init rcu_init_levelspread(struct rcu_state *rsp) cprv = nr_cpu_ids; for (i = rcu_num_lvls - 1; i >= 0; i--) { - ccur = rsp->levelcnt[i]; - rsp->levelspread[i] = (cprv + ccur - 1) / ccur; + ccur = levelcnt[i]; + levelspread[i] = (cprv + ccur - 1) / ccur; cprv = ccur; } } @@ -3776,6 +3776,9 @@ static void __init rcu_init_one(struct rcu_state *rsp, "rcu_node_fqs_2", "rcu_node_fqs_3" }; static u8 fl_mask = 0x1; + + int levelcnt[RCU_NUM_LVLS]; /* # nodes in each level. */ + int levelspread[RCU_NUM_LVLS]; /* kids/node in each level. */ int cpustride = 1; int i; int j; @@ -3790,19 +3793,19 @@ static void __init rcu_init_one(struct rcu_state *rsp, /* Initialize the level-tracking arrays. */ for (i = 0; i < rcu_num_lvls; i++) - rsp->levelcnt[i] = num_rcu_lvl[i]; + levelcnt[i] = num_rcu_lvl[i]; for (i = 1; i < rcu_num_lvls; i++) - rsp->level[i] = rsp->level[i - 1] + rsp->levelcnt[i - 1]; - rcu_init_levelspread(rsp); + rsp->level[i] = rsp->level[i - 1] + levelcnt[i - 1]; + rcu_init_levelspread(levelspread, levelcnt); rsp->flavor_mask = fl_mask; fl_mask <<= 1; /* Initialize the elements themselves, starting from the leaves. */ for (i = rcu_num_lvls - 1; i >= 0; i--) { - cpustride *= rsp->levelspread[i]; + cpustride *= levelspread[i]; rnp = rsp->level[i]; - for (j = 0; j < rsp->levelcnt[i]; j++, rnp++) { + for (j = 0; j < levelcnt[i]; j++, rnp++) { raw_spin_lock_init(&rnp->lock); lockdep_set_class_and_name(&rnp->lock, &rcu_node_class[i], buf[i]); @@ -3822,10 +3825,10 @@ static void __init rcu_init_one(struct rcu_state *rsp, rnp->grpmask = 0; rnp->parent = NULL; } else { - rnp->grpnum = j % rsp->levelspread[i - 1]; + rnp->grpnum = j % levelspread[i - 1]; rnp->grpmask = 1UL << rnp->grpnum; rnp->parent = rsp->level[i - 1] + - j / rsp->levelspread[i - 1]; + j / levelspread[i - 1]; } rnp->level = i; INIT_LIST_HEAD(&rnp->blkd_tasks); diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 0f7a469..a3e4714 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -414,8 +414,6 @@ do { \ struct rcu_state { struct rcu_node node[NUM_RCU_NODES]; /* Hierarchy. */ struct rcu_node *level[RCU_NUM_LVLS]; /* Hierarchy levels. */ - u32 levelcnt[RCU_NUM_LVLS]; /* # nodes in each level. */ - u8 levelspread[RCU_NUM_LVLS]; /* kids/node in each level. */ u8 flavor_mask; /* bit in flavor mask. */ struct rcu_data __percpu *rda; /* pointer of percu rcu_data. */ void (*call)(struct rcu_head *head, /* call_rcu() flavor. */ -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
