teach shmem_get_link() to work in RCU mode
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
parent
d3883d4f93
commit
6a6c990496
10
mm/shmem.c
10
mm/shmem.c
|
@ -2501,12 +2501,20 @@ static const char *shmem_get_link(struct dentry *dentry,
|
|||
{
|
||||
struct page *page = NULL;
|
||||
int error;
|
||||
if (!dentry)
|
||||
if (!dentry) {
|
||||
page = find_get_page(inode->i_mapping, 0);
|
||||
if (!page)
|
||||
return ERR_PTR(-ECHILD);
|
||||
if (!PageUptodate(page)) {
|
||||
put_page(page);
|
||||
return ERR_PTR(-ECHILD);
|
||||
}
|
||||
} else {
|
||||
error = shmem_getpage(inode, 0, &page, SGP_READ, NULL);
|
||||
if (error)
|
||||
return ERR_PTR(error);
|
||||
unlock_page(page);
|
||||
}
|
||||
*cookie = page;
|
||||
return page_address(page);
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue