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author | Andreas Gruenbacher <agruenba@redhat.com> | 2021-07-24 12:26:41 +0200 |
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committer | Andreas Gruenbacher <agruenba@redhat.com> | 2021-10-24 15:26:05 +0200 |
commit | 4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d (patch) | |
tree | b6468d6e6a3fecb66b4a5e9c46819268bf9289ad /fs/erofs/data.c | |
parent | 97308f8b0d867e9ef59528cd97f0db55ffdf5651 (diff) | |
download | linux-4fdccaa0d184c202f98d73b24e3ec8eeee88ab8d.tar.bz2 |
iomap: Add done_before argument to iomap_dio_rw
Add a done_before argument to iomap_dio_rw that indicates how much of
the request has already been transferred. When the request succeeds, we
report that done_before additional bytes were tranferred. This is
useful for finishing a request asynchronously when part of the request
has already been completed synchronously.
We'll use that to allow iomap_dio_rw to be used with page faults
disabled: when a page fault occurs while submitting a request, we
synchronously complete the part of the request that has already been
submitted. The caller can then take care of the page fault and call
iomap_dio_rw again for the rest of the request, passing in the number of
bytes already tranferred.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/erofs/data.c')
-rw-r--r-- | fs/erofs/data.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/erofs/data.c b/fs/erofs/data.c index 9db829715652..16a41d0db55a 100644 --- a/fs/erofs/data.c +++ b/fs/erofs/data.c @@ -287,7 +287,7 @@ static ssize_t erofs_file_read_iter(struct kiocb *iocb, struct iov_iter *to) if (!err) return iomap_dio_rw(iocb, to, &erofs_iomap_ops, - NULL, 0); + NULL, 0, 0); if (err < 0) return err; } |