Re: [PATCH 3/9] fs: explicitly check for CHECK_IOVEC_ONLY in rw_copy_check_uvector
From: Matthew Wilcox <willy@infradead.org>
Date: 2020-09-18 12:56:26
Also in:
io-uring, keyrings, linux-arch, linux-arm-kernel, linux-block, linux-fsdevel, linux-mips, linux-mm, linux-s390, linux-scsi, linux-security-module, linuxppc-dev, lkml, sparclinux
On Fri, Sep 18, 2020 at 02:45:27PM +0200, Christoph Hellwig wrote:
}
- if (type >= 0
- && unlikely(!access_ok(buf, len))) {
+ if (type != CHECK_IOVEC_ONLY && unlikely(!access_ok(buf, len))) {drop the unlikely() at the same time? if it's really advantageous, that should be embedded in the access_ok macro.