diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-09-08 01:01:14 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-09-08 01:01:14 -0300 |
commit | e5fd91f1ef340da553f7a79da9540c3db711c937 (patch) | |
tree | b11842027dc6641da63f4bcc524f8678263304a3 /lib/radix-tree.c | |
parent | 2a9b0348e685a63d97486f6749622b61e9e3292f (diff) |
Linux-libre 4.2-gnu
Diffstat (limited to 'lib/radix-tree.c')
-rw-r--r-- | lib/radix-tree.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/lib/radix-tree.c b/lib/radix-tree.c index 3d2aa27b8..f9ebe1c82 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c @@ -33,7 +33,7 @@ #include <linux/string.h> #include <linux/bitops.h> #include <linux/rcupdate.h> -#include <linux/preempt_mask.h> /* in_interrupt() */ +#include <linux/preempt.h> /* in_interrupt() */ /* @@ -65,7 +65,8 @@ static struct kmem_cache *radix_tree_node_cachep; */ struct radix_tree_preload { int nr; - struct radix_tree_node *nodes[RADIX_TREE_PRELOAD_SIZE]; + /* nodes->private_data points to next preallocated node */ + struct radix_tree_node *nodes; }; static DEFINE_PER_CPU(struct radix_tree_preload, radix_tree_preloads) = { 0, }; @@ -197,8 +198,9 @@ radix_tree_node_alloc(struct radix_tree_root *root) */ rtp = this_cpu_ptr(&radix_tree_preloads); if (rtp->nr) { - ret = rtp->nodes[rtp->nr - 1]; - rtp->nodes[rtp->nr - 1] = NULL; + ret = rtp->nodes; + rtp->nodes = ret->private_data; + ret->private_data = NULL; rtp->nr--; } /* @@ -257,17 +259,20 @@ static int __radix_tree_preload(gfp_t gfp_mask) preempt_disable(); rtp = this_cpu_ptr(&radix_tree_preloads); - while (rtp->nr < ARRAY_SIZE(rtp->nodes)) { + while (rtp->nr < RADIX_TREE_PRELOAD_SIZE) { preempt_enable(); node = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask); if (node == NULL) goto out; preempt_disable(); rtp = this_cpu_ptr(&radix_tree_preloads); - if (rtp->nr < ARRAY_SIZE(rtp->nodes)) - rtp->nodes[rtp->nr++] = node; - else + if (rtp->nr < RADIX_TREE_PRELOAD_SIZE) { + node->private_data = rtp->nodes; + rtp->nodes = node; + rtp->nr++; + } else { kmem_cache_free(radix_tree_node_cachep, node); + } } ret = 0; out: @@ -1463,15 +1468,16 @@ static int radix_tree_callback(struct notifier_block *nfb, { int cpu = (long)hcpu; struct radix_tree_preload *rtp; + struct radix_tree_node *node; /* Free per-cpu pool of perloaded nodes */ if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) { rtp = &per_cpu(radix_tree_preloads, cpu); while (rtp->nr) { - kmem_cache_free(radix_tree_node_cachep, - rtp->nodes[rtp->nr-1]); - rtp->nodes[rtp->nr-1] = NULL; - rtp->nr--; + node = rtp->nodes; + rtp->nodes = node->private_data; + kmem_cache_free(radix_tree_node_cachep, node); + rtp->nr--; } } return NOTIFY_OK; |