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authorChristoph Hellwig <hch@lst.de>2021-10-12 19:18:02 +0300
committerJens Axboe <axboe@kernel.dk>2021-10-18 15:17:35 +0300
commit9774b39175fe3606ce2a836a47134c53b75681c9 (patch)
treef846668e045184db3585b99651b82c0ef400992f /block/bio.c
parent9a6083becbe113ed1e28059ce659dc8ae71b33c3 (diff)
downloadlinux-9774b39175fe3606ce2a836a47134c53b75681c9.tar.xz
block: mark __bio_try_merge_page static
Mark __bio_try_merge_page static and move it up a bit to avoid the need for a forward declaration. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bio.c')
-rw-r--r--block/bio.c77
1 files changed, 38 insertions, 39 deletions
diff --git a/block/bio.c b/block/bio.c
index 7e2899071de2..c89e402356a5 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -808,6 +808,44 @@ static inline bool page_is_mergeable(const struct bio_vec *bv,
return (bv->bv_page + bv_end / PAGE_SIZE) == (page + off / PAGE_SIZE);
}
+/**
+ * __bio_try_merge_page - try appending data to an existing bvec.
+ * @bio: destination bio
+ * @page: start page to add
+ * @len: length of the data to add
+ * @off: offset of the data relative to @page
+ * @same_page: return if the segment has been merged inside the same page
+ *
+ * Try to add the data at @page + @off to the last bvec of @bio. This is a
+ * useful optimisation for file systems with a block size smaller than the
+ * page size.
+ *
+ * Warn if (@len, @off) crosses pages in case that @same_page is true.
+ *
+ * Return %true on success or %false on failure.
+ */
+static bool __bio_try_merge_page(struct bio *bio, struct page *page,
+ unsigned int len, unsigned int off, bool *same_page)
+{
+ if (WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)))
+ return false;
+
+ if (bio->bi_vcnt > 0) {
+ struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
+
+ if (page_is_mergeable(bv, page, len, off, same_page)) {
+ if (bio->bi_iter.bi_size > UINT_MAX - len) {
+ *same_page = false;
+ return false;
+ }
+ bv->bv_len += len;
+ bio->bi_iter.bi_size += len;
+ return true;
+ }
+ }
+ return false;
+}
+
/*
* Try to merge a page into a segment, while obeying the hardware segment
* size limit. This is not for normal read/write bios, but for passthrough
@@ -940,45 +978,6 @@ int bio_add_zone_append_page(struct bio *bio, struct page *page,
EXPORT_SYMBOL_GPL(bio_add_zone_append_page);
/**
- * __bio_try_merge_page - try appending data to an existing bvec.
- * @bio: destination bio
- * @page: start page to add
- * @len: length of the data to add
- * @off: offset of the data relative to @page
- * @same_page: return if the segment has been merged inside the same page
- *
- * Try to add the data at @page + @off to the last bvec of @bio. This is a
- * useful optimisation for file systems with a block size smaller than the
- * page size.
- *
- * Warn if (@len, @off) crosses pages in case that @same_page is true.
- *
- * Return %true on success or %false on failure.
- */
-bool __bio_try_merge_page(struct bio *bio, struct page *page,
- unsigned int len, unsigned int off, bool *same_page)
-{
- if (WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)))
- return false;
-
- if (bio->bi_vcnt > 0) {
- struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
-
- if (page_is_mergeable(bv, page, len, off, same_page)) {
- if (bio->bi_iter.bi_size > UINT_MAX - len) {
- *same_page = false;
- return false;
- }
- bv->bv_len += len;
- bio->bi_iter.bi_size += len;
- return true;
- }
- }
- return false;
-}
-EXPORT_SYMBOL_GPL(__bio_try_merge_page);
-
-/**
* __bio_add_page - add page(s) to a bio in a new segment
* @bio: destination bio
* @page: start page to add