tree 744410b0a8b2a36fa895e0e1033bb7ec93c1cbd8
parent f78b8250a076ac63ddd021c7ea9739bcc2f6f737
author Matthew Wilcox (Oracle) <willy@infradead.org> 1602593189 -0400
committer Matthew Wilcox (Oracle) <willy@infradead.org> 1602593609 -0400

XArray: Fix xas_create_range for ranges above 4 billion

The 'sibs' variable would be shifted as a 32-bit integer, so if 'shift'
is more than 32, this is undefined behaviour.  In practice, this doesn't
happen because the page cache is the only user and nobody uses 16TB pages.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>