[PATCH 2/2] f2fs: introduce __wait_discard_cmd

[Chao Yu]

Just cleanup, no logic change.

Signed-off-by: Chao Yu <yuch...@huawei.com>
---
 fs/f2fs/segment.c | 40 ++++++++++++++++++----------------------
 1 file changed, 18 insertions(+), 22 deletions(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 57989c2c3a6a..c88e7535aede 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1000,6 +1000,22 @@ static void __issue_discard_cmd(struct f2fs_sb_info 
*sbi, bool issue_cond)
        mutex_unlock(&dcc->cmd_lock);
 }
 
+static void __wait_discard_cmd(struct f2fs_sb_info *sbi, bool wait_cond)
+{
+       struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
+       struct list_head *wait_list = &(dcc->wait_list);
+       struct discard_cmd *dc, *tmp;
+
+       mutex_lock(&dcc->cmd_lock);
+       list_for_each_entry_safe(dc, tmp, wait_list, list) {
+               if (!wait_cond || dc->state == D_DONE) {
+                       wait_for_completion_io(&dc->wait);
+                       __remove_discard_cmd(sbi, dc);
+               }
+       }
+       mutex_unlock(&dcc->cmd_lock);
+}
+
 /* This should be covered by global mutex, &sit_i->sentry_lock */
 void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
 {
@@ -1021,18 +1037,8 @@ void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, 
block_t blkaddr)
 /* This comes from f2fs_put_super */
 void f2fs_wait_discard_bios(struct f2fs_sb_info *sbi)
 {
-       struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
-       struct list_head *wait_list = &(dcc->wait_list);
-       struct discard_cmd *dc, *tmp;
-
        __issue_discard_cmd(sbi, false);
-
-       mutex_lock(&dcc->cmd_lock);
-       list_for_each_entry_safe(dc, tmp, wait_list, list) {
-               wait_for_completion_io(&dc->wait);
-               __remove_discard_cmd(sbi, dc);
-       }
-       mutex_unlock(&dcc->cmd_lock);
+       __wait_discard_cmd(sbi, false);
 }
 
 static int issue_discard_thread(void *data)
@@ -1040,22 +1046,12 @@ static int issue_discard_thread(void *data)
        struct f2fs_sb_info *sbi = data;
        struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
        wait_queue_head_t *q = &dcc->discard_wait_queue;
-       struct list_head *wait_list = &dcc->wait_list;
-       struct discard_cmd *dc, *tmp;
 repeat:
        if (kthread_should_stop())
                return 0;
 
        __issue_discard_cmd(sbi, true);
-
-       mutex_lock(&dcc->cmd_lock);
-       list_for_each_entry_safe(dc, tmp, wait_list, list) {
-               if (dc->state == D_DONE) {
-                       wait_for_completion_io(&dc->wait);
-                       __remove_discard_cmd(sbi, dc);
-               }
-       }
-       mutex_unlock(&dcc->cmd_lock);
+       __wait_discard_cmd(sbi, true);
 
        congestion_wait(BLK_RW_SYNC, HZ/50);
 
-- 
2.12.2.510.ge1104a5ee539