linux-kernel - [PATCH] f2fs: fix compile warning in f2fs_destroy_node

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Message-Id: <20230629014134.3058318-1-chao@kernel.org>
Date:   Thu, 29 Jun 2023 09:41:34 +0800
From:   Chao Yu <chao@...nel.org>
To:     jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Chao Yu <chao@...nel.org>
Subject: [PATCH] f2fs: fix compile warning in f2fs_destroy_node_manager()

fs/f2fs/node.c: In function ‘f2fs_destroy_node_manager’:
fs/f2fs/node.c:3390:1: warning: the frame size of 1048 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 3390 | }

Merging below pointer arrays into common one, and reuse it by cast type.

struct nat_entry *natvec[NATVEC_SIZE];
struct nat_entry_set *setvec[SETVEC_SIZE];

Signed-off-by: Chao Yu <chao@...nel.org>
---
 fs/f2fs/node.c | 14 ++++++++------
 fs/f2fs/node.h |  3 +--
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index dadea6b01888..3e1fa564db8f 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -3062,7 +3062,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
 	struct f2fs_journal *journal = curseg->journal;
-	struct nat_entry_set *setvec[SETVEC_SIZE];
+	struct nat_entry_set *setvec[NAT_VEC_SIZE];
 	struct nat_entry_set *set, *tmp;
 	unsigned int found;
 	nid_t set_idx = 0;
@@ -3095,7 +3095,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 		remove_nats_in_journal(sbi);
 
 	while ((found = __gang_lookup_nat_set(nm_i,
-					set_idx, SETVEC_SIZE, setvec))) {
+					set_idx, NAT_VEC_SIZE, setvec))) {
 		unsigned idx;
 
 		set_idx = setvec[found - 1]->set + 1;
@@ -3316,8 +3316,9 @@ void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
 	struct free_nid *i, *next_i;
-	struct nat_entry *natvec[NATVEC_SIZE];
-	struct nat_entry_set *setvec[SETVEC_SIZE];
+	void *vec[NAT_VEC_SIZE];
+	struct nat_entry **natvec = (struct nat_entry **)vec;
+	struct nat_entry_set **setvec = (struct nat_entry_set **)vec;
 	nid_t nid = 0;
 	unsigned int found;
 
@@ -3340,7 +3341,7 @@ void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi)
 	/* destroy nat cache */
 	f2fs_down_write(&nm_i->nat_tree_lock);
 	while ((found = __gang_lookup_nat_cache(nm_i,
-					nid, NATVEC_SIZE, natvec))) {
+					nid, NAT_VEC_SIZE, natvec))) {
 		unsigned idx;
 
 		nid = nat_get_nid(natvec[found - 1]) + 1;
@@ -3356,8 +3357,9 @@ void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi)
 
 	/* destroy nat set cache */
 	nid = 0;
+	memset(vec, 0, sizeof(void *) * NAT_VEC_SIZE);
 	while ((found = __gang_lookup_nat_set(nm_i,
-					nid, SETVEC_SIZE, setvec))) {
+					nid, NAT_VEC_SIZE, setvec))) {
 		unsigned idx;
 
 		nid = setvec[found - 1]->set + 1;
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 906fb67a99da..5bd16a95eef8 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -35,8 +35,7 @@
 #define DEF_RF_NODE_BLOCKS			0
 
 /* vector size for gang look-up from nat cache that consists of radix tree */
-#define NATVEC_SIZE	64
-#define SETVEC_SIZE	32
+#define NAT_VEC_SIZE	32
 
 /* return value for read_node_page */
 #define LOCKED_PAGE	1
-- 
2.40.1