[PATCH] s1d13xxxfb linkage fix

[linux-2.6] / mm / filemap.c

diff --git a/mm/filemap.c b/mm/filemap.c
index 47263ac3e4ea8ef73ea1d955624a23295e514f72..4a2fee2cb62bad714491e1e910406ecd66dc2557 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1004,7 +1004,7 @@ __generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
                if (pos < size) {
                        retval = generic_file_direct_IO(READ, iocb,
                                                iov, pos, nr_segs);
-                       if (retval >= 0 && !is_sync_kiocb(iocb))
+                       if (retval > 0 && !is_sync_kiocb(iocb))
                                retval = -EIOCBQUEUED;
                        if (retval > 0)
                                *ppos = pos + retval;
@@ -1968,6 +1968,7 @@ generic_file_buffered_write(struct kiocb *iocb, const struct iovec *iov,
        do {
                unsigned long index;
                unsigned long offset;
+               unsigned long maxlen;
                size_t copied;
 
                offset = (pos & (PAGE_CACHE_SIZE -1)); /* Within page */
@@ -1982,7 +1983,10 @@ generic_file_buffered_write(struct kiocb *iocb, const struct iovec *iov,
                 * same page as we're writing to, without it being marked
                 * up-to-date.
                 */
-               fault_in_pages_readable(buf, bytes);
+               maxlen = cur_iov->iov_len - iov_base;
+               if (maxlen > bytes)
+                       maxlen = bytes;
+               fault_in_pages_readable(buf, maxlen);
 
                page = __grab_cache_page(mapping,index,&cached_page,&lru_pvec);
                if (!page) {
@@ -2024,6 +2028,8 @@ generic_file_buffered_write(struct kiocb *iocb, const struct iovec *iov,
                                        filemap_set_next_iovec(&cur_iov,
                                                        &iov_base, status);
                                        buf = cur_iov->iov_base + iov_base;
+                               } else {
+                                       iov_base += status;
                                }
                        }
                }