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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-10-03 11:09:16 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-10-03 11:09:16 +0200 |
| commit | 0d3c24e936feefeca854073ccb40613cd6eba9a9 (patch) | |
| tree | 1f675397b924846740b0931b066ddce6f3d7eb3d /Documentation/RCU/whatisRCU.txt | |
| parent | 1af0838de60e723cb02253ecc9b555c30f8f6a6f (diff) | |
| parent | ebec44a2456fbe5fe18aae88f6010f6878f0cb4a (diff) | |
Merge airlied/drm-next into drm-misc-next
Just catching up with upstream.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'Documentation/RCU/whatisRCU.txt')
| -rw-r--r-- | Documentation/RCU/whatisRCU.txt | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt index 8ed6c9f6133c..df62466da4e0 100644 --- a/Documentation/RCU/whatisRCU.txt +++ b/Documentation/RCU/whatisRCU.txt @@ -890,6 +890,8 @@ SRCU: Critical sections Grace period Barrier srcu_read_lock_held SRCU: Initialization/cleanup + DEFINE_SRCU + DEFINE_STATIC_SRCU init_srcu_struct cleanup_srcu_struct @@ -913,7 +915,8 @@ a. Will readers need to block? If so, you need SRCU. b. What about the -rt patchset? If readers would need to block in an non-rt kernel, you need SRCU. If readers would block in a -rt kernel, but not in a non-rt kernel, SRCU is not - necessary. + necessary. (The -rt patchset turns spinlocks into sleeplocks, + hence this distinction.) c. Do you need to treat NMI handlers, hardirq handlers, and code segments with preemption disabled (whether |