In f2fs_remount, we will stop gc thread and set need_restart_gc as true when new
option is set without BG_GC, then if any error occurred in the following
procedure, we can restore to start the gc thread.
But after that, We will fail to restore gc thread in start_gc_thread as BG_GC is
not set in new option, so we'd better move this condition judgment out of
start_gc_thread to fix this issue.

Signed-off-by: Chao Yu <chao2...@samsung.com>
---
 fs/f2fs/gc.c    | 2 --
 fs/f2fs/super.c | 2 +-
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index b197a2f..657683c9 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -96,8 +96,6 @@ int start_gc_thread(struct f2fs_sb_info *sbi)
        dev_t dev = sbi->sb->s_bdev->bd_dev;
        int err = 0;
 
-       if (!test_opt(sbi, BG_GC))
-               goto out;
        gc_th = kmalloc(sizeof(struct f2fs_gc_kthread), GFP_KERNEL);
        if (!gc_th) {
                err = -ENOMEM;
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 512ffd8..536d414 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1138,7 +1138,7 @@ try_onemore:
         * If filesystem is not mounted as read-only then
         * do start the gc_thread.
         */
-       if (!f2fs_readonly(sb)) {
+       if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
                /* After POR, we can run background GC thread.*/
                err = start_gc_thread(sbi);
                if (err)
-- 
2.1.2


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