Linus Torvalds 5f50096f0a mm: always expand the stack with the mmap write lock held ... commit 8d7071af89 upstream. This finishes the job of always holding the mmap write lock when extending the user stack vma, and removes the 'write_locked' argument from the vm helper functions again. For some cases, we just avoid expanding the stack at all: drivers and page pinning really shouldn't be extending any stacks. Let's see if any strange users really wanted that. It's worth noting that architectures that weren't converted to the new lock_mm_and_find_vma() helper function are left using the legacy "expand_stack()" function, but it has been changed to drop the mmap_lock and take it for writing while expanding the vma. This makes it fairly straightforward to convert the remaining architectures. As a result of dropping and re-taking the lock, the calling conventions for this function have also changed, since the old vma may no longer be valid. So it will now return the new vma if successful, and NULL - and the lock dropped - if the area could not be extended. Tested-by: Vegard Nossum <vegard.nossum@oracle.com> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> # ia64 Tested-by: Frank Scheiner <frank.scheiner@web.de> # ia64 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-07-01 13:14:46 +02:00
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appldata	…
boot	s390/mm: fix direct map accounting	2023-05-17 14:02:08 +02:00
configs	s390: update defconfigs	2023-03-13 09:15:11 +01:00
crypto	s390/crypto: use vector instructions only if available for ChaCha20	2023-05-24 17:30:24 +01:00
hypfs	…
include	s390/mm: fix direct map accounting	2023-05-17 14:02:08 +02:00
kernel	s390/ipl: fix IPIB virtual vs physical address confusion	2023-06-09 10:48:06 +02:00
kvm	KVM: s390: pv: fix asynchronous teardown for small VMs	2023-05-17 14:01:46 +02:00
lib	s390/uaccess: add missing earlyclobber annotations to __clear_user()	2023-03-27 17:23:08 +02:00
mm	mm: always expand the stack with the mmap write lock held	2023-07-01 13:14:46 +02:00
net	s390/bpf: Fix bpf_arch_text_poke() with new_addr == NULL	2023-04-14 18:28:52 +02:00
pci	PCI: s390: Fix use-after-free of PCI resources with per-function hotplug	2023-03-13 09:15:11 +01:00
purgatory	s390/purgatory: disable branch profiling	2023-06-28 11:14:22 +02:00
tools	…
Kbuild	…
Kconfig	s390/checksum: always use cksm instruction	2023-05-11 23:17:32 +09:00
Kconfig.debug	…
Makefile	s390: reintroduce expoline dependence to scripts	2023-03-27 17:23:08 +02:00