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iomap: Convert iomap_write_end types 

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>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2020-09-21 08:58:41 -07:00 committed by Darrick J. Wong
parent 0fb2d7209d
commit e25ba8cbfd
1 changed files with 12 additions and 19 deletions
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31
fs/iomap/buffered-io.c
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@ -663,9 +663,8 @@ iomap_set_page_dirty(struct page *page)
} }
EXPORT_SYMBOL_GPL(iomap_set_page_dirty); EXPORT_SYMBOL_GPL(iomap_set_page_dirty);
static int static size_t __iomap_write_end(struct inode *inode, loff_t pos, size_t len,
__iomap_write_end(struct inode *inode, loff_t pos, unsigned len, size_t copied, struct page *page)
unsigned copied, struct page *page)
{ {
flush_dcache_page(page); flush_dcache_page(page);
@ -687,9 +686,8 @@ __iomap_write_end(struct inode *inode, loff_t pos, unsigned len,
return copied; return copied;
} }
static int static size_t iomap_write_end_inline(struct inode *inode, struct page *page,
iomap_write_end_inline(struct inode *inode, struct page *page, struct iomap *iomap, loff_t pos, size_t copied)
struct iomap *iomap, loff_t pos, unsigned copied)
{ {
void *addr; void *addr;
@ -705,13 +703,14 @@ iomap_write_end_inline(struct inode *inode, struct page *page,
return copied; return copied;
} }
static int /* Returns the number of bytes copied. May be 0. Cannot be an errno. */
iomap_write_end(struct inode *inode, loff_t pos, unsigned len, unsigned copied, static size_t iomap_write_end(struct inode *inode, loff_t pos, size_t len,
struct page *page, struct iomap *iomap, struct iomap *srcmap) size_t copied, struct page *page, struct iomap *iomap,
struct iomap *srcmap)
{ {
const struct iomap_page_ops *page_ops = iomap->page_ops; const struct iomap_page_ops *page_ops = iomap->page_ops;
loff_t old_size = inode->i_size; loff_t old_size = inode->i_size;
int ret; size_t ret;
if (srcmap->type == IOMAP_INLINE) { if (srcmap->type == IOMAP_INLINE) {
ret = iomap_write_end_inline(inode, page, iomap, pos, copied); 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); 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); srcmap);
if (unlikely(status < 0))
break;
copied = status;
cond_resched(); 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, status = iomap_write_end(inode, pos, bytes, bytes, page, iomap,
srcmap); srcmap);
if (unlikely(status <= 0)) { if (WARN_ON_ONCE(status == 0))
if (WARN_ON_ONCE(status == 0)) return -EIO;
return -EIO;
return status;
}
cond_resched(); cond_resched();