From: Eric Biggers <ebiggers@xxxxxxxxxx> In do_dentry_open(), initialize the readahead state using ->f_mapping instead of ->f_mapping->host->i_mapping. This is equivalent, even for block device files; we don't need the extra indirection because ->f_mapping already represents the data read/written by the file (which for block device nodes is the underlying block device mapping). Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx> --- fs/open.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/open.c b/fs/open.c index 949cef29c3bb..32e19fda24d2 100644 --- a/fs/open.c +++ b/fs/open.c @@ -763,7 +763,7 @@ static int do_dentry_open(struct file *f, f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC); - file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping); + file_ra_state_init(&f->f_ra, f->f_mapping); return 0; -- 2.12.1
