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libceph: remove ceph_get_direct_page_vector()

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This function is entirely unused.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Christoph Hellwig 2019-05-01 16:40:32 -04:00 committed by Ilya Dryomov
parent 0ecfebd2b5
commit 97a385e558
2 changed files with 0 additions and 37 deletions
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4
include/linux/ceph/libceph.h
View File

@ -299,10 +299,6 @@ int ceph_wait_for_latest_osdmap(struct ceph_client *client,
/* pagevec.c */
extern void ceph_release_page_vector(struct page **pages, int num_pages);
extern struct page **ceph_get_direct_page_vector(const void __user *data,
int num_pages,
bool write_page);
extern void ceph_put_page_vector(struct page **pages, int num_pages,
bool dirty);
extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);

33
net/ceph/pagevec.c
View File

@ -10,39 +10,6 @@
#include <linux/ceph/libceph.h>
/*
* build a vector of user pages
*/
struct page **ceph_get_direct_page_vector(const void __user *data,
int num_pages, bool write_page)
{
struct page **pages;
int got = 0;
int rc = 0;
pages = kmalloc_array(num_pages, sizeof(*pages), GFP_NOFS);
if (!pages)
return ERR_PTR(-ENOMEM);
while (got < num_pages) {
rc = get_user_pages_fast(
(unsigned long)data + ((unsigned long)got * PAGE_SIZE),
num_pages - got, write_page ? FOLL_WRITE : 0, pages + got);
if (rc < 0)
break;
BUG_ON(rc == 0);
got += rc;
}
if (rc < 0)
goto fail;
return pages;
fail:
ceph_put_page_vector(pages, got, false);
return ERR_PTR(rc);
}
EXPORT_SYMBOL(ceph_get_direct_page_vector);
void ceph_put_page_vector(struct page **pages, int num_pages, bool dirty)
{
int i;