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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-03-23 08:06:43 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-03-23 08:06:43 -0300 |
| commit | 7483d45f0aee3afc0646d185cabd4af9f6cab58c (patch) | |
| tree | a312f7d77c34748bec62f0431df33007b10e4e7f /Documentation/RCU/checklist.txt | |
| parent | 3e85fc1b9fc1c7e20b9a01f2314bb633bb10501a (diff) | |
| parent | f92c97c8bd77992ff8bd6ef29a23dc82dca799cb (diff) | |
Merge branch 'staging/for_v3.4' into v4l_for_linus
* staging/for_v3.4: (10117 commits)
[media] update CARDLIST.em28xx
[media] partially reverts changeset fa5527c
[media] stb0899: fix the limits for signal strength values
[media] em28xx: support for 2304:0242 PCTV QuatroStick (510e)
[media] em28xx: support for 2013:0251 PCTV QuatroStick nano (520e)
[media] -EINVAL -> -ENOTTY
[media] gspca - sn9c20x: Cleanup source
[media] gspca - sn9c20x: Simplify register write for capture start/stop
[media] gspca - sn9c20x: Add automatic JPEG compression mechanism
[media] gspca - sn9c20x: Greater delay in case of sensor no response
[media] gspca - sn9c20x: Optimize the code of write sequences
[media] gspca - sn9c20x: Add the JPEG compression quality control
[media] gspca - sn9c20x: Add a delay after Omnivision sensor reset
[media] gspca - sn9c20x: Propagate USB errors to higher level
[media] gspca - sn9c20x: Use the new video control mechanism
[media] gspca - sn9c20x: Fix loss of frame start
[media] gspca - zc3xx: Lack of register 08 value for sensor cs2102k
[media] gspca - ov534_9: Add brightness to OmniVision 5621 sensor
[media] gspca - zc3xx: Add V4L2_CID_JPEG_COMPRESSION_QUALITY control support
[media] pvrusb2: fix 7MHz & 8MHz DVB-T tuner support for HVR1900 rev D1F5
...
Diffstat (limited to 'Documentation/RCU/checklist.txt')
| -rw-r--r-- | Documentation/RCU/checklist.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/RCU/checklist.txt b/Documentation/RCU/checklist.txt index 0c134f8afc6..bff2d8be1e1 100644 --- a/Documentation/RCU/checklist.txt +++ b/Documentation/RCU/checklist.txt @@ -328,6 +328,12 @@ over a rather long period of time, but improvements are always welcome! RCU rather than SRCU, because RCU is almost always faster and easier to use than is SRCU. + If you need to enter your read-side critical section in a + hardirq or exception handler, and then exit that same read-side + critical section in the task that was interrupted, then you need + to srcu_read_lock_raw() and srcu_read_unlock_raw(), which avoid + the lockdep checking that would otherwise this practice illegal. + Also unlike other forms of RCU, explicit initialization and cleanup is required via init_srcu_struct() and cleanup_srcu_struct(). These are passed a "struct srcu_struct" |