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| author | Uros Bizjak <ubizjak@gmail.com> | 2024-05-22 11:26:48 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-06-25 15:20:53 +0300 |
| commit | 5c555f1f1c31f7dd60a7697be9bb0e98706bb10a (patch) | |
| tree | eb1b86466a506f7949a2d34ee6528ddf44c32b0b /tools/perf/scripts/python/stackcollapse.py | |
| parent | 83a7eefedc9b56fe7bfeff13b6c7356688ffa670 (diff) | |
| download | linux-5c555f1f1c31f7dd60a7697be9bb0e98706bb10a.tar.xz | |
iommu/vt-d: Use try_cmpxchg64() in intel_pasid_get_entry()
Use try_cmpxchg64() instead of cmpxchg64 (*ptr, old, new) != old in
intel_pasid_get_entry(). cmpxchg returns success in ZF flag, so
this change saves a compare after cmpxchg (and related move
instruction in front of cmpxchg).
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Will Deacon <will@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20240522082729.971123-2-ubizjak@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions