Linus Torvalds e6bbad7571 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. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [6.1: Patch drivers/iommu/io-pgfault.c instead] Signed-off-by: Samuel Mendoza-Jonas <samjonas@amazon.com> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-07-01 13:16:25 +02:00
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Makefile	…
cmm.c	…
dump_pagetables.c	s390/mm,ptdump: avoid Kasan vs Memcpy Real markers swapping	2023-03-10 09:33:51 +01:00
extable.c	…
extmem.c	s390/extmem: return correct segment type in __segment_load()	2023-03-10 09:34:04 +01:00
fault.c	mm: always expand the stack with the mmap write lock held	2023-07-01 13:16:25 +02:00
gmap.c	s390: remove vma linked list walks	2022-09-26 19:46:19 -07:00
hugetlbpage.c	s390/hugetlb: switch to generic version of follow_huge_pud()	2022-09-11 20:26:01 -07:00
init.c	s390/smp: rework absolute lowcore access	2022-09-14 16:46:00 +02:00
kasan_init.c	…
maccess.c	use less confusing names for iov_iter direction initializers	2023-02-09 11:28:04 +01:00
mmap.c	treewide: use get_random_u32() when possible	2022-10-11 17:42:58 -06:00
page-states.c	…
pageattr.c	…
pgalloc.c	…
pgtable.c	…
vmem.c	s390/vmem: fix empty page tables cleanup under KASAN	2023-03-10 09:33:00 +01:00