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authorDavid Howells <dhowells@redhat.com>2023-05-22 23:57:42 +0300
committerJens Axboe <axboe@kernel.dk>2023-05-24 17:42:44 +0300
commitfd363244e883323e1ac9412d96fd22b51e255b0c (patch)
treea4ab29760b6dac530b091b7d8bb0ba6d79cc6f2c /block/blk.h
parente51bab4e20586fb3afc30536b776a97ed8ffb681 (diff)
downloadlinux-fd363244e883323e1ac9412d96fd22b51e255b0c.tar.xz
block: Add BIO_PAGE_PINNED and associated infrastructure
Add BIO_PAGE_PINNED to indicate that the pages in a bio are pinned (FOLL_PIN) and that the pin will need removing. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: John Hubbard <jhubbard@nvidia.com> cc: Al Viro <viro@zeniv.linux.org.uk> cc: Jens Axboe <axboe@kernel.dk> cc: Jan Kara <jack@suse.cz> cc: Matthew Wilcox <willy@infradead.org> cc: Logan Gunthorpe <logang@deltatee.com> cc: linux-block@vger.kernel.org Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20230522205744.2825689-5-dhowells@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk.h')
-rw-r--r--block/blk.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h
index 9f171b8f1e34..7ad7cb6ffa01 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -420,6 +420,18 @@ int bio_add_hw_page(struct request_queue *q, struct bio *bio,
struct page *page, unsigned int len, unsigned int offset,
unsigned int max_sectors, bool *same_page);
+/*
+ * Clean up a page appropriately, where the page may be pinned, may have a
+ * ref taken on it or neither.
+ */
+static inline void bio_release_page(struct bio *bio, struct page *page)
+{
+ if (bio_flagged(bio, BIO_PAGE_PINNED))
+ unpin_user_page(page);
+ else if (bio_flagged(bio, BIO_PAGE_REFFED))
+ put_page(page);
+}
+
struct request_queue *blk_alloc_queue(int node_id);
int disk_scan_partitions(struct gendisk *disk, fmode_t mode);