f2fs: introduce sbi->gc_mode to determine the policy This is to avoid sbi->gc_thread pointer access. Signed-off-by: Jaegeuk Kim <[email protected]>

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 9f27e9b..55cba4f 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c

@@ -177,7 +177,7 @@ bool need_SSR(struct f2fs_sb_info *sbi)
 
 	if (test_opt(sbi, LFS))
 		return false;
-	if (sbi->gc_thread && sbi->gc_thread->gc_urgent)
+	if (sbi->gc_mode == GC_URGENT)
 		return true;
 
 	return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
@@ -1405,7 +1405,7 @@ static int issue_discard_thread(void *data)
 		if (dcc->discard_wake)
 			dcc->discard_wake = 0;
 
-		if (sbi->gc_thread && sbi->gc_thread->gc_urgent)
+		if (sbi->gc_mode == GC_URGENT)
 			__init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, 1);
 
 		sb_start_intwrite(sbi->sb);