target/arc: Make LF be cleared on usermode interrupt #48 #214
Conversation
This file contains hidden or 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 an interrupt requires LF to be cleared and there is no hook for usermode interrupts, we save/validate current thread id to detect preemption and clear LF. This only needs to be done where it is relevant for LF (llock/scond variant helpers). Signed-off-by: BrunoASMauricio <brunoasmauricio@gmail.com>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
2 participants
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 Outdated suggestions cannot be applied.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.
Since an interrupt requires LF to be cleared and there is no hook for usermode interrupts, we save/validate current thread id to detect preemption and clear LF. This only needs to be done where it is relevant for LF (llock/scond variant helpers).
P.S. This is a patch for an old issue. We can safely push it.