riscv_percpu: Replace critical section with irqsave/irqrestore #15171
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Since the SCRATCH register is used to store the percpu pointer, which should not be accessed by other CPUs, we can replace the critical section with irqsave/irqrestore. Signed-off-by: Huang Qi <[email protected]>
github-actions
bot
added
Arch: risc-v
pussuw
approved these changes
Dec 13, 2024
xiaoxiang781216
approved these changes
Dec 13, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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Outdated suggestions cannot be applied.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.
Summary
Since the SCRATCH register is used to store the percpu pointer, which should not be accessed by other CPUs, we can replace the critical section with irqsave/irqrestore.
Impact
RISCV percpu
Testing
ostest