f2fs: fix to update iostat correctly in f2fs_filemap_fault()

[ Upstream commit bb34cc6ca87ff78f9fb5913d7619dc1389554da6 ]

In f2fs_filemap_fault(), it fixes to update iostat info only if
VM_FAULT_LOCKED is tagged in return value of filemap_fault().

Fixes: 8b83ac81f428 ("f2fs: support read iostat")
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 e36a320..a631d70 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -42,7 +42,7 @@ static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
        vm_fault_t ret;
 
        ret = filemap_fault(vmf);
-       if (!ret)
+       if (ret & VM_FAULT_LOCKED)
                f2fs_update_iostat(F2FS_I_SB(inode), inode,
                                        APP_MAPPED_READ_IO, F2FS_BLKSIZE);