diff options
| author | Ming Lei <ming.lei@canonical.com> | 2013-11-26 12:43:37 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 17:56:37 -0800 |
| commit | 0d6077f8b48ed2dce8f2466a76c0d574a3b4dbe9 (patch) | |
| tree | 2cee9d850ad7bf0ee2e933ed7259a9267fe7aafa | |
| parent | e05a1fd9468bc99bf67bd81601d46d84d93c21c8 (diff) | |
lib/scatterlist: export sg_miter_skip()
sg_copy_buffer() can't meet demand for some drrivers(such usb
mass storage), so we have to use the sg_miter_* APIs to access
sg buffer, then need export sg_miter_skip() for these drivers.
The API is needed for converting to sg_miter_* APIs in USB storage
driver for accessing sg buffer.
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Reviewed-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/scatterlist.h | 1 | ||||
| -rw-r--r-- | lib/scatterlist.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h index adae88f5b0ab..a964f7285600 100644 --- a/include/linux/scatterlist.h +++ b/include/linux/scatterlist.h @@ -345,6 +345,7 @@ struct sg_mapping_iter { void sg_miter_start(struct sg_mapping_iter *miter, struct scatterlist *sgl, unsigned int nents, unsigned int flags); +bool sg_miter_skip(struct sg_mapping_iter *miter, off_t offset); bool sg_miter_next(struct sg_mapping_iter *miter); void sg_miter_stop(struct sg_mapping_iter *miter); diff --git a/lib/scatterlist.c b/lib/scatterlist.c index d16fa295ae1d..3a8e8e8fb2a5 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -495,7 +495,7 @@ static bool sg_miter_get_next_page(struct sg_mapping_iter *miter) * true if @miter contains the valid mapping. false if end of sg * list is reached. */ -static bool sg_miter_skip(struct sg_mapping_iter *miter, off_t offset) +bool sg_miter_skip(struct sg_mapping_iter *miter, off_t offset) { sg_miter_stop(miter); @@ -513,6 +513,7 @@ static bool sg_miter_skip(struct sg_mapping_iter *miter, off_t offset) return true; } +EXPORT_SYMBOL(sg_miter_skip); /** * sg_miter_next - proceed mapping iterator to the next mapping |