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Subject[PATCH v2 8/9] iomap: Convert iomap_write_end types
Date
iomap_write_end cannot return an error, so switch it to return
size_t instead of int and remove the error checking from the callers.
Also convert the arguments to size_t from unsigned int, in case anyone
ever wants to support a page size larger than 2GB.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
fs/iomap/buffered-io.c | 31 ++++++++++++-------------------
1 file changed, 12 insertions(+), 19 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 64a5cb383f30..cb25a7b70401 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -663,9 +663,8 @@ iomap_set_page_dirty(struct page *page)
}
EXPORT_SYMBOL_GPL(iomap_set_page_dirty);

-static int
-__iomap_write_end(struct inode *inode, loff_t pos, unsigned len,
- unsigned copied, struct page *page)
+static size_t __iomap_write_end(struct inode *inode, loff_t pos, size_t len,
+ size_t copied, struct page *page)
{
flush_dcache_page(page);

@@ -687,9 +686,8 @@ __iomap_write_end(struct inode *inode, loff_t pos, unsigned len,
return copied;
}

-static int
-iomap_write_end_inline(struct inode *inode, struct page *page,
- struct iomap *iomap, loff_t pos, unsigned copied)
+static size_t iomap_write_end_inline(struct inode *inode, struct page *page,
+ struct iomap *iomap, loff_t pos, size_t copied)
{
void *addr;

@@ -705,13 +703,14 @@ iomap_write_end_inline(struct inode *inode, struct page *page,
return copied;
}

-static int
-iomap_write_end(struct inode *inode, loff_t pos, unsigned len, unsigned copied,
- struct page *page, struct iomap *iomap, struct iomap *srcmap)
+/* Returns the number of bytes copied. May be 0. Cannot be an errno. */
+static size_t iomap_write_end(struct inode *inode, loff_t pos, size_t len,
+ size_t copied, struct page *page, struct iomap *iomap,
+ struct iomap *srcmap)
{
const struct iomap_page_ops *page_ops = iomap->page_ops;
loff_t old_size = inode->i_size;
- int ret;
+ size_t ret;

if (srcmap->type == IOMAP_INLINE) {
ret = iomap_write_end_inline(inode, page, iomap, pos, copied);
@@ -790,11 +789,8 @@ iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,

copied = iov_iter_copy_from_user_atomic(page, i, offset, bytes);

- status = iomap_write_end(inode, pos, bytes, copied, page, iomap,
+ copied = iomap_write_end(inode, pos, bytes, copied, page, iomap,
srcmap);
- if (unlikely(status < 0))
- break;
- copied = status;

cond_resched();

@@ -868,11 +864,8 @@ iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data,

status = iomap_write_end(inode, pos, bytes, bytes, page, iomap,
srcmap);
- if (unlikely(status <= 0)) {
- if (WARN_ON_ONCE(status == 0))
- return -EIO;
- return status;
- }
+ if (WARN_ON_ONCE(status == 0))
+ return -EIO;

cond_resched();

--
2.28.0
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