AFS: write support fixes
AFS write support fixes:
(1) Support large files using the 64-bit file access operations if available
on the server.
(2) Use kmap_atomic() rather than kmap() in afs_prepare_page().
(3) Don't do stuff in afs_writepage() that's done by the caller.
[akpm@linux-foundation.org: fix right shift count >= width of type]
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 83ff292..aa03d43 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -122,7 +122,7 @@
if (offset == 0 && to == PAGE_SIZE)
return 0;
- p = kmap(page);
+ p = kmap_atomic(page, KM_USER0);
i_size = i_size_read(&vnode->vfs_inode);
pos = (loff_t) page->index << PAGE_SHIFT;
@@ -133,7 +133,7 @@
memset(p, 0, offset);
if (to < PAGE_SIZE)
memset(p + to, 0, PAGE_SIZE - to);
- kunmap(page);
+ kunmap_atomic(p, KM_USER0);
return 0;
}
@@ -152,7 +152,7 @@
memset(p + eof, 0, PAGE_SIZE - eof);
}
- kunmap(p);
+ kunmap_atomic(p, KM_USER0);
ret = 0;
if (offset > 0 || eof > to) {
@@ -489,14 +489,6 @@
_enter("{%lx},", page->index);
- if (wbc->sync_mode != WB_SYNC_NONE)
- wait_on_page_writeback(page);
-
- if (PageWriteback(page) || !PageDirty(page)) {
- unlock_page(page);
- return 0;
- }
-
wb = (struct afs_writeback *) page_private(page);
ASSERT(wb != NULL);