fix: Remove unnecessary check for syscall wrapper in sys_enter tracepoint #4236
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
1. Explain what the PR does
The sys_enter raw tracepoint always provides direct access to pt_regs, regardless of the architecture's use of a syscall wrapper. This commit removes the redundant conditional check and simplifies the logic for extracting system call arguments.
2. Explain how to test it
3. Other comments
See the code here being executed before the call to the sys_enter tracepoint:
https://github.com/torvalds/linux/blob/master/arch/x86/entry/entry_64_fred.S#L21