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authorIngo Molnar <mingo@elte.hu>2011-03-15 08:29:44 +0100
committerIngo Molnar <mingo@elte.hu>2011-03-15 08:29:44 +0100
commit8460b3e5bc64955aeefdd8357b3bf7b5ff79b3f2 (patch)
tree7e5f6d050b72ab08a4497e82a4a103fefb086e80 /net/ceph/pagevec.c
parent56396e6823fe9b42fe9cf9403d6ed67756255f70 (diff)
parent521cb40b0c44418a4fd36dc633f575813d59a43d (diff)
Merge commit 'v2.6.38' into x86/mm
Conflicts: arch/x86/mm/numa_64.c Merge reason: Resolve the conflict, update the branch to .38. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'net/ceph/pagevec.c')
-rw-r--r--net/ceph/pagevec.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c
index 1a040e64c69f..cd9c21df87d1 100644
--- a/net/ceph/pagevec.c
+++ b/net/ceph/pagevec.c
@@ -16,22 +16,30 @@ struct page **ceph_get_direct_page_vector(const char __user *data,
int num_pages, bool write_page)
{
struct page **pages;
- int rc;
+ int got = 0;
+ int rc = 0;
pages = kmalloc(sizeof(*pages) * num_pages, GFP_NOFS);
if (!pages)
return ERR_PTR(-ENOMEM);
down_read(&current->mm->mmap_sem);
- rc = get_user_pages(current, current->mm, (unsigned long)data,
- num_pages, write_page, 0, pages, NULL);
+ while (got < num_pages) {
+ rc = get_user_pages(current, current->mm,
+ (unsigned long)data + ((unsigned long)got * PAGE_SIZE),
+ num_pages - got, write_page, 0, pages + got, NULL);
+ if (rc < 0)
+ break;
+ BUG_ON(rc == 0);
+ got += rc;
+ }
up_read(&current->mm->mmap_sem);
- if (rc < num_pages)
+ if (rc < 0)
goto fail;
return pages;
fail:
- ceph_put_page_vector(pages, rc > 0 ? rc : 0, false);
+ ceph_put_page_vector(pages, got, false);
return ERR_PTR(rc);
}
EXPORT_SYMBOL(ceph_get_direct_page_vector);