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linux/drivers/iommu/amd
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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>
History 2023-07-01 13:16:25 +02:00
..
amd_iommu.h iommu/amd: Fix up merge conflict resolution 2023-06-09 10:34:00 +02:00
amd_iommu_types.h iommu/amd: Fix "Guest Virtual APIC Table Root Pointer" configuration in IRTE 2023-05-11 23:03:04 +09:00
debugfs.c iommu/amd: Move AMD IOMMU driver into subdirectory 2020-06-10 17:46:42 +02:00
init.c iommu/amd: Handle GALog overflows 2023-06-09 10:34:00 +02:00
io_pgtable.c iommu/amd/io-pgtable: Implement unmap_pages io_pgtable_ops callback 2022-09-07 16:12:33 +02:00
io_pgtable_v2.c iommu/amd: Initial support for AMD IOMMU v2 page table 2022-09-07 16:12:35 +02:00
iommu.c iommu/amd/pgtbl_v2: Fix domain max address 2023-06-09 10:34:28 +02:00
iommu_v2.c mm: always expand the stack with the mmap write lock held 2023-07-01 13:16:25 +02:00
Kconfig iommu/dma: Clean up Kconfig 2022-09-07 14:46:59 +02:00
Makefile iommu/amd: Initial support for AMD IOMMU v2 page table 2022-09-07 16:12:35 +02:00
quirks.c iommu/amd: Include PCI segment ID when initialize IOMMU 2022-07-07 09:37:51 +02:00