linux-kernel - [PATCH v3 2/2] erofs: remove unused EROFS_GET_BLOCKS

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Message-Id: <20230209024825.17335-2-jefflexu@linux.alibaba.com>
Date:   Thu,  9 Feb 2023 10:48:25 +0800
From:   Jingbo Xu <jefflexu@...ux.alibaba.com>
To:     xiang@...nel.org, chao@...nel.org, linux-erofs@...ts.ozlabs.org,
        huyue2@...lpad.com
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH v3 2/2] erofs: remove unused EROFS_GET_BLOCKS_RAW flag

For erofs_map_blocks() and erofs_map_blocks_flatmode(), the flags
argument is always EROFS_GET_BLOCKS_RAW.  Thus remove the unused flags
parameter for these two functions.

Besides EROFS_GET_BLOCKS_RAW is originally introduced for reading
compressed (raw) data for compressed files.  However it's never used
actually and let's remove it now.

Signed-off-by: Jingbo Xu <jefflexu@...ux.alibaba.com>
---
 fs/erofs/data.c              | 14 ++++++--------
 fs/erofs/fscache.c           |  2 +-
 fs/erofs/internal.h          | 10 ++++------
 include/trace/events/erofs.h |  1 -
 4 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 2713257ee718..032e12dccb84 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -74,8 +74,7 @@ void *erofs_read_metabuf(struct erofs_buf *buf, struct super_block *sb,
 }
 
 static int erofs_map_blocks_flatmode(struct inode *inode,
-				     struct erofs_map_blocks *map,
-				     int flags)
+				     struct erofs_map_blocks *map)
 {
 	erofs_blk_t nblocks, lastblk;
 	u64 offset = map->m_la;
@@ -114,8 +113,7 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
 	return 0;
 }
 
-int erofs_map_blocks(struct inode *inode,
-		     struct erofs_map_blocks *map, int flags)
+int erofs_map_blocks(struct inode *inode, struct erofs_map_blocks *map)
 {
 	struct super_block *sb = inode->i_sb;
 	struct erofs_inode *vi = EROFS_I(inode);
@@ -127,7 +125,7 @@ int erofs_map_blocks(struct inode *inode,
 	void *kaddr;
 	int err = 0;
 
-	trace_erofs_map_blocks_enter(inode, map, flags);
+	trace_erofs_map_blocks_enter(inode, map, 0);
 	map->m_deviceid = 0;
 	if (map->m_la >= inode->i_size) {
 		/* leave out-of-bound access unmapped */
@@ -137,7 +135,7 @@ int erofs_map_blocks(struct inode *inode,
 	}
 
 	if (vi->datalayout != EROFS_INODE_CHUNK_BASED) {
-		err = erofs_map_blocks_flatmode(inode, map, flags);
+		err = erofs_map_blocks_flatmode(inode, map);
 		goto out;
 	}
 
@@ -189,7 +187,7 @@ int erofs_map_blocks(struct inode *inode,
 out:
 	if (!err)
 		map->m_llen = map->m_plen;
-	trace_erofs_map_blocks_exit(inode, map, flags, 0);
+	trace_erofs_map_blocks_exit(inode, map, 0, err);
 	return err;
 }
 
@@ -252,7 +250,7 @@ static int erofs_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
 	map.m_la = offset;
 	map.m_llen = length;
 
-	ret = erofs_map_blocks(inode, &map, EROFS_GET_BLOCKS_RAW);
+	ret = erofs_map_blocks(inode, &map);
 	if (ret < 0)
 		return ret;
 
diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c
index 03de4dc99302..9658cf8689d9 100644
--- a/fs/erofs/fscache.c
+++ b/fs/erofs/fscache.c
@@ -197,7 +197,7 @@ static int erofs_fscache_data_read_slice(struct erofs_fscache_request *primary)
 	int ret;
 
 	map.m_la = pos;
-	ret = erofs_map_blocks(inode, &map, EROFS_GET_BLOCKS_RAW);
+	ret = erofs_map_blocks(inode, &map);
 	if (ret)
 		return ret;
 
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index 48a2f33de15a..8a6ae820cd6d 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -401,16 +401,15 @@ struct erofs_map_blocks {
 	unsigned int m_flags;
 };
 
-#define EROFS_GET_BLOCKS_RAW    0x0001
 /*
  * Used to get the exact decompressed length, e.g. fiemap (consider lookback
  * approach instead if possible since it's more metadata lightweight.)
  */
-#define EROFS_GET_BLOCKS_FIEMAP	0x0002
+#define EROFS_GET_BLOCKS_FIEMAP		0x0001
 /* Used to map the whole extent if non-negligible data is requested for LZMA */
-#define EROFS_GET_BLOCKS_READMORE	0x0004
+#define EROFS_GET_BLOCKS_READMORE	0x0002
 /* Used to map tail extent for tailpacking inline or fragment pcluster */
-#define EROFS_GET_BLOCKS_FINDTAIL	0x0008
+#define EROFS_GET_BLOCKS_FINDTAIL	0x0004
 
 enum {
 	Z_EROFS_COMPRESSION_SHIFTED = Z_EROFS_COMPRESSION_MAX,
@@ -458,8 +457,7 @@ void *erofs_read_metabuf(struct erofs_buf *buf, struct super_block *sb,
 int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *dev);
 int erofs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		 u64 start, u64 len);
-int erofs_map_blocks(struct inode *inode,
-		     struct erofs_map_blocks *map, int flags);
+int erofs_map_blocks(struct inode *inode, struct erofs_map_blocks *map);
 struct inode *erofs_iget(struct super_block *sb, erofs_nid_t nid);
 int erofs_getattr(struct user_namespace *mnt_userns, const struct path *path,
 		  struct kstat *stat, u32 request_mask,
diff --git a/include/trace/events/erofs.h b/include/trace/events/erofs.h
index f0e43e40a4a1..cf4a0d28b178 100644
--- a/include/trace/events/erofs.h
+++ b/include/trace/events/erofs.h
@@ -19,7 +19,6 @@ struct erofs_map_blocks;
 		{ 1,		"DIR" })
 
 #define show_map_flags(flags) __print_flags(flags, "|",	\
-	{ EROFS_GET_BLOCKS_RAW,		"RAW" },	\
 	{ EROFS_GET_BLOCKS_FIEMAP,	"FIEMAP" },	\
 	{ EROFS_GET_BLOCKS_READMORE,	"READMORE" },	\
 	{ EROFS_GET_BLOCKS_FINDTAIL,	"FINDTAIL" })
-- 
2.19.1.6.gb485710b