aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--fs/ext4/balloc.c2
-rw-r--r--include/linux/percpu_counter.h12
-rw-r--r--lib/percpu_counter.c8
3 files changed, 7 insertions, 15 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index e9fa960ba6da..00a94d5866c2 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -1624,7 +1624,7 @@ ext4_fsblk_t ext4_has_free_blocks(struct ext4_sb_info *sbi,
1624#ifdef CONFIG_SMP 1624#ifdef CONFIG_SMP
1625 if (free_blocks - root_blocks < FBC_BATCH) 1625 if (free_blocks - root_blocks < FBC_BATCH)
1626 free_blocks = 1626 free_blocks =
1627 percpu_counter_sum_and_set(&sbi->s_freeblocks_counter); 1627 percpu_counter_sum(&sbi->s_freeblocks_counter);
1628#endif 1628#endif
1629 if (free_blocks <= root_blocks) 1629 if (free_blocks <= root_blocks)
1630 /* we don't have free space */ 1630 /* we don't have free space */
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index 208388835357..9007ccdfc112 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -35,7 +35,7 @@ int percpu_counter_init_irq(struct percpu_counter *fbc, s64 amount);
35void percpu_counter_destroy(struct percpu_counter *fbc); 35void percpu_counter_destroy(struct percpu_counter *fbc);
36void percpu_counter_set(struct percpu_counter *fbc, s64 amount); 36void percpu_counter_set(struct percpu_counter *fbc, s64 amount);
37void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch); 37void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch);
38s64 __percpu_counter_sum(struct percpu_counter *fbc, int set); 38s64 __percpu_counter_sum(struct percpu_counter *fbc);
39 39
40static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount) 40static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount)
41{ 41{
@@ -44,19 +44,13 @@ static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount)
44 44
45static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc) 45static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc)
46{ 46{
47 s64 ret = __percpu_counter_sum(fbc, 0); 47 s64 ret = __percpu_counter_sum(fbc);
48 return ret < 0 ? 0 : ret; 48 return ret < 0 ? 0 : ret;
49} 49}
50 50
51static inline s64 percpu_counter_sum_and_set(struct percpu_counter *fbc)
52{
53 return __percpu_counter_sum(fbc, 1);
54}
55
56
57static inline s64 percpu_counter_sum(struct percpu_counter *fbc) 51static inline s64 percpu_counter_sum(struct percpu_counter *fbc)
58{ 52{
59 return __percpu_counter_sum(fbc, 0); 53 return __percpu_counter_sum(fbc);
60} 54}
61 55
62static inline s64 percpu_counter_read(struct percpu_counter *fbc) 56static inline s64 percpu_counter_read(struct percpu_counter *fbc)
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index 4a8ba4bf5f6f..a8663890a88c 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(__percpu_counter_add);
52 * Add up all the per-cpu counts, return the result. This is a more accurate 52 * Add up all the per-cpu counts, return the result. This is a more accurate
53 * but much slower version of percpu_counter_read_positive() 53 * but much slower version of percpu_counter_read_positive()
54 */ 54 */
55s64 __percpu_counter_sum(struct percpu_counter *fbc, int set) 55s64 __percpu_counter_sum(struct percpu_counter *fbc)
56{ 56{
57 s64 ret; 57 s64 ret;
58 int cpu; 58 int cpu;
@@ -62,11 +62,9 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc, int set)
62 for_each_online_cpu(cpu) { 62 for_each_online_cpu(cpu) {
63 s32 *pcount = per_cpu_ptr(fbc->counters, cpu); 63 s32 *pcount = per_cpu_ptr(fbc->counters, cpu);
64 ret += *pcount; 64 ret += *pcount;
65 if (set) 65 *pcount = 0;
66 *pcount = 0;
67 } 66 }
68 if (set) 67 fbc->count = ret;
69 fbc->count = ret;
70 68
71 spin_unlock(&fbc->lock); 69 spin_unlock(&fbc->lock);
72 return ret; 70 return ret;