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Linus Torvalds eee9c708cc gup: avoid stack expansion warning for known-good case 
In commit a425ac5365 ("gup: add warning if some caller would seem to
want stack expansion") I added a temporary warning to catch any strange
GUP users that would be impacted by the fact that GUP no longer extends
the stack.

But it turns out that the warning is most easily triggered through
__access_remote_vm(), that already knows to expand the stack - it just
does it *after* calling GUP.  So the warning is easy to trigger by just
running gdb (or similar) and accessing things remotely under the stack.

This just adds a temporary extra "expand stack early" to avoid the
warning for the already converted case - not because the warning is bad,
but because getting the warning for this known good case would then hide
any subsequent warnings for any actually interesting cases.

Let's try to remember to revert this change when we remove the warnings.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-06-29 12:36:47 -07:00
arch drm changes for 6.5-rc1: 2023-06-29 11:00:17 -07:00
block - Yosry Ahmed brought back some cgroup v1 stats in OOM logs. 2023-06-28 10:28:11 -07:00
certs KEYS: Add missing function documentation 2023-04-24 16:15:52 +03:00
crypto sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
Documentation drm changes for 6.5-rc1: 2023-06-29 11:00:17 -07:00
drivers drm changes for 6.5-rc1: 2023-06-29 11:00:17 -07:00
fs Merge branch 'expand-stack' 2023-06-28 20:35:21 -07:00
include drm changes for 6.5-rc1: 2023-06-29 11:00:17 -07:00
init - Arnd Bergmann has fixed a bunch of -Wmissing-prototypes in 2023-06-28 10:59:38 -07:00
io_uring Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
lib Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm gup: avoid stack expansion warning for known-good case 2023-06-29 12:36:47 -07:00
net Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
rust rust: error: impl Debug for Error with errname() integration 2023-06-13 01:24:42 +02:00
samples Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
scripts Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
security v6.5-rc1-sysctl-next 2023-06-28 16:05:21 -07:00
sound sound updates for 6.5-rc1 2023-06-29 10:46:47 -07:00
tools sound updates for 6.5-rc1 2023-06-29 10:46:47 -07:00
usr initramfs: Check negative timestamp to prevent broken cpio archive 2023-04-16 17:37:01 +09:00
virt - Yosry Ahmed brought back some cgroup v1 stats in OOM logs. 2023-06-28 10:28:11 -07:00
.clang-format cxl for v6.4 2023-04-30 11:51:51 -07:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore linux-kselftest-kunit-6.4-rc1 2023-04-24 12:31:32 -07:00
.mailmap drm changes for 6.5-rc1: 2023-06-29 11:00:17 -07:00
.rustfmt.toml
COPYING
CREDITS - Address -Wmissing-prototype warnings 2023-06-26 16:43:54 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS drm changes for 6.5-rc1: 2023-06-29 11:00:17 -07:00
Makefile hardening updates for v6.5-rc1 2023-06-27 21:24:18 -07:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.