f2fs: fix to initialize map.m_pblk in f2fs_precache_extents()

[ Upstream commit 8b07c1fb0f1ad139373c8253f2fad8bc43fab07d ]

Otherwise, it may print random physical block address in tracepoint
of f2fs_map_blocks() as below:

f2fs_map_blocks: dev = (253,16), ino = 2297, file offset = 0, start blkaddr = 0xa356c421, len = 0x0, flags = 0

Fixes: c4020b2da4c9 ("f2fs: support F2FS_IOC_PRECACHE_EXTENTS")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index ca59041..d034703 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3258,6 +3258,7 @@ int f2fs_precache_extents(struct inode *inode)
                return -EOPNOTSUPP;
 
        map.m_lblk = 0;
+       map.m_pblk = 0;
        map.m_next_pgofs = NULL;
        map.m_next_extent = &m_next_extent;
        map.m_seg_type = NO_CHECK_TYPE;