diff options
Diffstat (limited to 'fs/buffer.c')
| -rw-r--r-- | fs/buffer.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index 1a30db77af3..36d66653b93 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -29,7 +29,7 @@ #include <linux/file.h> #include <linux/quotaops.h> #include <linux/highmem.h> -#include <linux/module.h> +#include <linux/export.h> #include <linux/writeback.h> #include <linux/hash.h> #include <linux/suspend.h> @@ -1384,10 +1384,23 @@ static void invalidate_bh_lru(void *arg) } put_cpu_var(bh_lrus); } + +static bool has_bh_in_lru(int cpu, void *dummy) +{ + struct bh_lru *b = per_cpu_ptr(&bh_lrus, cpu); + int i; + for (i = 0; i < BH_LRU_SIZE; i++) { + if (b->bhs[i]) + return 1; + } + + return 0; +} + void invalidate_bh_lrus(void) { - on_each_cpu(invalidate_bh_lru, NULL, 1); + on_each_cpu_cond(has_bh_in_lru, invalidate_bh_lru, NULL, 1, GFP_KERNEL); } EXPORT_SYMBOL_GPL(invalidate_bh_lrus); |