lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <6840fb3848258_24911003e@dwillia2-xfh.jf.intel.com.notmuch> Date: Wed, 4 Jun 2025 19:04:40 -0700 From: Dan Williams <dan.j.williams@...el.com> To: Alistair Popple <apopple@...dia.com>, <linux-mm@...ck.org> CC: Alistair Popple <apopple@...dia.com>, <gerald.schaefer@...ux.ibm.com>, <dan.j.williams@...el.com>, <jgg@...pe.ca>, <willy@...radead.org>, <david@...hat.com>, <linux-kernel@...r.kernel.org>, <nvdimm@...ts.linux.dev>, <linux-fsdevel@...r.kernel.org>, <linux-ext4@...r.kernel.org>, <linux-xfs@...r.kernel.org>, <jhubbard@...dia.com>, <hch@....de>, <zhang.lyra@...il.com>, <debug@...osinc.com>, <bjorn@...nel.org>, <balbirs@...dia.com>, <lorenzo.stoakes@...cle.com>, <linux-arm-kernel@...ts.infradead.org>, <loongarch@...ts.linux.dev>, <linuxppc-dev@...ts.ozlabs.org>, <linux-riscv@...ts.infradead.org>, <linux-cxl@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>, <John@...ves.net> Subject: Re: [PATCH 06/12] mm/gup: Remove pXX_devmap usage from get_user_pages() Alistair Popple wrote: > GUP uses pXX_devmap() calls to see if it needs to a get a reference on > the associated pgmap data structure to ensure the pages won't go > away. However it's a driver responsibility to ensure that if pages are > mapped (ie. discoverable by GUP) that they are not offlined or removed > from the memmap so there is no need to hold a reference on the pgmap > data structure to ensure this. > > Furthermore mappings with PFN_DEV are no longer created, hence this > effectively dead code anyway so can be removed. > > Signed-off-by: Alistair Popple <apopple@...dia.com> > --- > include/linux/huge_mm.h | 3 +- > mm/gup.c | 162 +---------------------------------------- > mm/huge_memory.c | 40 +---------- > 3 files changed, 5 insertions(+), 200 deletions(-) Hooray! Goodbye dev_pagemap mess in gup.c. Reviewed-by: Dan Williams <dan.j.williams@...el.com>
Powered by blists - more mailing lists