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f2fs: introduce help macro on_build_free_nids()

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Introduce help macro on_build_free_nids() which just uses build_lock
to judge whether the building free nid is going, so that we can remove
the on_build_free_nids field from f2fs_sb_info.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
[Jaegeuk Kim: remove an unnecessary white line removal]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Gu Zheng 2014-02-21 18:08:29 +08:00 committed by Jaegeuk Kim
parent fffc2a00fc
commit f978f5a061
2 changed files with 3 additions and 4 deletions
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1
fs/f2fs/f2fs.h
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@ -417,7 +417,6 @@ struct f2fs_sb_info {
struct mutex node_write; /* locking node writes */
struct mutex writepages; /* mutex for writepages() */
bool por_doing; /* recovery is doing or not */
bool on_build_free_nids; /* build_free_nids is doing */
wait_queue_head_t cp_wait;
/* for orphan inode management */

6
fs/f2fs/node.c
View file

@ -21,6 +21,8 @@
#include "segment.h"
#include <trace/events/f2fs.h>
#define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock)
static struct kmem_cache *nat_entry_slab;
static struct kmem_cache *free_nid_slab;
@ -1422,7 +1424,7 @@ bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
spin_lock(&nm_i->free_nid_list_lock);
/* We should not use stale free nids created by build_free_nids */
if (nm_i->fcnt && !sbi->on_build_free_nids) {
if (nm_i->fcnt && !on_build_free_nids(nm_i)) {
f2fs_bug_on(list_empty(&nm_i->free_nid_list));
list_for_each(this, &nm_i->free_nid_list) {
i = list_entry(this, struct free_nid, list);
@ -1441,9 +1443,7 @@ bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
/* Let's scan nat pages and its caches to get free nids */
mutex_lock(&nm_i->build_lock);
sbi->on_build_free_nids = true;
build_free_nids(sbi);
sbi->on_build_free_nids = false;
mutex_unlock(&nm_i->build_lock);
goto retry;
}