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AFS: write support fixes

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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>
This commit is contained in:
David Howells
2007-05-10 03:15:21 -07:00
committed by Linus Torvalds
parent 218e180e7e
commit b9b1f8d593
3 changed files with 216 additions and 17 deletions
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14
fs/afs/write.c
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@@ -122,7 +122,7 @@ static int afs_prepare_page(struct afs_vnode *vnode, struct page *page,
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 @@ static int afs_prepare_page(struct afs_vnode *vnode, struct page *page,
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 @@ static int afs_prepare_page(struct afs_vnode *vnode, struct page *page,
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 @@ int afs_writepage(struct page *page, struct writeback_control *wbc)
_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);