summaryrefslogtreecommitdiffstats
path: root/fs/splice.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/splice.c')
-rw-r--r--fs/splice.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/splice.c b/fs/splice.c
index 421b3b8..6ddd032 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -265,7 +265,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
unsigned int flags)
{
struct address_space *mapping = in->f_mapping;
- unsigned int loff, nr_pages;
+ unsigned int loff, nr_pages, req_pages;
struct page *pages[PIPE_BUFFERS];
struct partial_page partial[PIPE_BUFFERS];
struct page *page;
@@ -281,10 +281,8 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
index = *ppos >> PAGE_CACHE_SHIFT;
loff = *ppos & ~PAGE_CACHE_MASK;
- nr_pages = (len + loff + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
- if (nr_pages > PIPE_BUFFERS)
- nr_pages = PIPE_BUFFERS;
+ req_pages = (len + loff + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ nr_pages = min(req_pages, (unsigned)PIPE_BUFFERS);
/*
* Lookup the (hopefully) full range of pages we need.
@@ -298,7 +296,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
*/
if (spd.nr_pages < nr_pages)
page_cache_readahead_ondemand(mapping, &in->f_ra, in,
- NULL, index, nr_pages - spd.nr_pages);
+ NULL, index, req_pages - spd.nr_pages);
error = 0;
while (spd.nr_pages < nr_pages) {
@@ -355,7 +353,7 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
if (PageReadahead(page))
page_cache_readahead_ondemand(mapping, &in->f_ra, in,
- page, index, nr_pages - page_nr);
+ page, index, req_pages - page_nr);
/*
* If the page isn't uptodate, we may need to start io on it
OpenPOWER on IntegriCloud