[PATCH v3 1/3] f2fs: avoid opened loop codes in __add_ino_entry

From: Chao Yu
Date: Thu Nov 09 2017 - 20:31:23 EST


We will keep __add_ino_entry success all the time, for ENOMEM failure
case, we have already handled it by using __GFP_NOFAIL flag, so we
don't have to use additional opened loop codes here, remove them.

Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
---
v3:
- give compiler a hint with unlikely keyword.
- remove unneeded variable
fs/f2fs/checkpoint.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 98777c1ae70c..a30024f2a567 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -407,18 +407,16 @@ static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
struct ino_entry *e, *tmp;

tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
-retry:
+
radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);

spin_lock(&im->ino_lock);
e = radix_tree_lookup(&im->ino_root, ino);
if (!e) {
e = tmp;
- if (radix_tree_insert(&im->ino_root, ino, e)) {
- spin_unlock(&im->ino_lock);
- radix_tree_preload_end();
- goto retry;
- }
+ if (unlikely(radix_tree_insert(&im->ino_root, ino, e)))
+ f2fs_bug_on(sbi, 1);
+
memset(e, 0, sizeof(struct ino_entry));
e->ino = ino;

--
2.15.0.55.gc2ece9dc4de6