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linux/drivers/iommu
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Uros Bizjak b95a40122a iommufd: Use atomic_long_try_cmpxchg() in incr_user_locked_vm() 
Use atomic_long_try_cmpxchg() instead of
atomic_long_cmpxchg (*ptr, old, new) != old in incr_user_locked_vm().
cmpxchg returns success in ZF flag, so this change saves a compare
after cmpxchg (and related move instruction in front of cmpxchg).

Also, atomic_long_try_cmpxchg() implicitly assigns old *ptr
value to "old" when cmpxchg fails. There is no need to re-read
the value in the loop.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Will Deacon <will@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20240522082729.971123-3-ubizjak@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2024-06-25 14:21:10 +02:00
..
amd iommu/amd: Fix Invalid wait context issue 2024-06-04 14:00:59 +02:00
arm Merge branches 'arm/renesas', 'arm/smmu', 'x86/amd', 'core' and 'x86/vt-d' into next 2024-05-13 14:06:54 +02:00
intel tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
iommufd iommufd: Use atomic_long_try_cmpxchg() in incr_user_locked_vm() 2024-06-25 14:21:10 +02:00
apple-dart.c iommu: constify of_phandle_args in xlate 2024-03-01 13:46:57 +01:00
dma-iommu.c iommu/dma: Prune redundant pgprot arguments 2024-06-13 11:17:33 +02:00
dma-iommu.h iommu/dma: Centralise iommu_setup_dma_ops() 2024-04-26 12:07:26 +02:00
exynos-iommu.c iommu/exynos: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:45 +02:00
fsl_pamu_domain.c iommu/fsl_pamu: Implement a PLATFORM domain 2023-09-25 11:40:54 +02:00
fsl_pamu_domain.h
fsl_pamu.c iommu/fsl: fix all kernel-doc warnings in fsl_pamu.c 2023-03-22 14:50:15 +01:00
fsl_pamu.h
hyperv-iommu.c x86/vector: Rename send_cleanup_vector() to vector_schedule_cleanup() 2023-08-06 14:15:09 +02:00
io-pgfault.c iommu: Make iommu_report_device_fault() return void 2024-02-16 15:19:37 +01:00
io-pgtable-arm-v7s.c iommu/io-pgtable-arm-v7s: Remove map/unmap 2022-11-19 10:44:15 +01:00
io-pgtable-arm.c iommu/io-pgtable-arm: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:44 +02:00
io-pgtable-arm.h
io-pgtable-dart.c iommu/io-pgtable-dart: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:44 +02:00
io-pgtable.c iommu: Allow passing custom allocators to pgtable drivers 2023-11-27 11:10:12 +01:00
iommu-debugfs.c
iommu-pages.h iommu: account IOMMU allocated memory 2024-04-15 14:31:48 +02:00
iommu-priv.h iommu: constify pointer to bus_type 2024-03-01 13:46:57 +01:00
iommu-sva.c iommu: Make iommu_sva_domain_alloc() static 2024-06-13 11:14:43 +02:00
iommu-sysfs.c iommu: Do not export iommu_device_link/unlink() 2023-07-14 16:14:15 +02:00
iommu-traces.c iommu: Remove detach_dev callback 2023-01-13 16:39:18 +01:00
iommu.c iommu/dma: Centralise iommu_setup_dma_ops() 2024-04-26 12:07:26 +02:00
iova.c iommu/iova: Add missing MODULE_DESCRIPTION() macro 2024-06-14 16:51:10 +02:00
ipmmu-vmsa.c Merge branches 'arm/mediatek', 'arm/renesas', 'arm/smmu', 'x86/vt-d', 'x86/amd' and 'core' into next 2024-03-08 09:05:59 +01:00
irq_remapping.c IOMMU Updates for Linux v6.10 2024-05-18 10:55:13 -07:00
irq_remapping.h iommu/vt-d: Allocate DMAR fault interrupts locally 2024-04-26 11:57:36 +02:00
Kconfig iommu/arm-smmu-v3: Make the kunit into a module 2024-05-10 14:14:14 +02:00
Makefile iommu: Separate SVA and IOPF 2024-02-16 15:19:29 +01:00
msm_iommu_hw-8xxx.h
msm_iommu.c iommu: constify of_phandle_args in xlate 2024-03-01 13:46:57 +01:00
msm_iommu.h
mtk_iommu_v1.c iommu: mtk: fix module autoloading 2024-04-12 12:04:50 +02:00
mtk_iommu.c iommu: mtk: fix module autoloading 2024-04-12 12:04:50 +02:00
of_iommu.c iommu: re-use local fwnode variable in iommu_ops_from_fwnode() 2024-03-01 13:47:01 +01:00
omap-iommu-debug.c iommu/omap: Fix buffer overflow in debugfs 2022-09-07 10:42:28 +02:00
omap-iommu.c iommu: Mark dev_iommu_priv_set() with a lockdep 2023-12-12 10:18:49 +01:00
omap-iommu.h iommu/omap: Convert to generic_single_device_group() 2023-09-25 11:52:08 +02:00
omap-iopgtable.h
rockchip-iommu.c iommu/rockchip: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:45 +02:00
s390-iommu.c iommu/dma: Centralise iommu_setup_dma_ops() 2024-04-26 12:07:26 +02:00
sprd-iommu.c iommu: constify of_phandle_args in xlate 2024-03-01 13:46:57 +01:00
sun50i-iommu.c iommu/sun50i: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:46 +02:00
tegra-smmu.c iommu/tegra-smmu: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:46 +02:00
virtio-iommu.c virtio: features, fixes, cleanups 2024-05-23 12:04:36 -07:00