tag | ba3be0d71d981ebbca392ea8634757f0e487aa4d | |
---|---|---|
tagger | Howard Chen <howardsoc@google.com> | Sat May 07 20:27:05 2022 +0800 |
object | 83cbf18b7dcdafd816c9c7ad409b295285dc46ff |
android12-5.10 November 2021 release 14 Artifacts kernel: https://ci.android.com/builds/submitted/8546841/kernel_aarch64/latest boot.img: https://ci.android.com/builds/submitted/8549680/gsi_arm64-user/latest
commit | 83cbf18b7dcdafd816c9c7ad409b295285dc46ff | [log] [tgz] |
---|---|---|
author | mazhenhua <mazhenhua@xiaomi.com> | Wed Nov 10 11:16:06 2021 +0800 |
committer | zhe wu <wuzhe@oppo.com> | Thu May 05 03:32:05 2022 +0000 |
tree | c8f4e33483ec220c0ff021ed3d3eec741de05478 | |
parent | 817f661dfd9a38252a484755119891026ecd1464 [diff] |
ANDROID: locking/rwsem: only clean RWSEM_FLAG_HANDOFF when already set sem->count will be negative after writer is killed if flag RWSEM_FLAG_HANDOFF is not set, we shouldn't clean again CPU2 CPU4 task A[reader] task B[writer] down_read_killable[locked] sem->count=0x100 down_write_killable sem->count=0x102[wlist not empty] up_read count=0x2 sig kill received down_read_killable sem->count=0x102[wlist not empty] goto branch out_nolock: list_del(&waiter.list); wait list is empty sem->count-RWSEM_FLAG_HANDOFF sem->count=0xFE list_empty(&sem->wait_list) is TRUE sem->count andnot RWSEM_FLAG_WAITERS sem->count=0xFC up_read sem->count-=0x100 sem->count=0xFFFFFFFFFFFFFFFC DEBUG_RWSEMS_WARN_ON(tmp < 0, sem); Bug: 204595609 Bug: 231491029 Link: https://lore.kernel.org/all/a630a9aa-8c66-31c9-21a0-3d30bde2c9df@redhat.com/T/ Signed-off-by: mazhenhua <mazhenhua@xiaomi.com> Change-Id: Ife64c179335d74768a3d68e402c72d10148f3e7e (cherry picked from commit 7a7b5f89d96f514a0754957debeca3c6936bc580)
BEST: Make all of your changes to upstream Linux. If appropriate, backport to the stable releases. These patches will be merged automatically in the corresponding common kernels. If the patch is already in upstream Linux, post a backport of the patch that conforms to the patch requirements below.
EXPORT_SYMBOL_GPL()
require an in-tree modular driver that uses the symbol -- so include the new driver or changes to an existing driver in the same patchset as the export.LESS GOOD: Develop your patches out-of-tree (from an upstream Linux point-of-view). Unless these are fixing an Android-specific bug, these are very unlikely to be accepted unless they have been coordinated with kernel-team@android.com. If you want to proceed, post a patch that conforms to the patch requirements below.
script/checkpatch.pl
UPSTREAM:
, BACKPORT:
, FROMGIT:
, FROMLIST:
, or ANDROID:
.Change-Id:
tag (see https://gerrit-review.googlesource.com/Documentation/user-changeid.html)Bug:
tag.Signed-off-by:
tag by the author and the submitterAdditional requirements are listed below based on patch type
UPSTREAM:
, BACKPORT:
UPSTREAM:
.(cherry picked from commit ...)
lineimportant patch from upstream This is the detailed description of the important patch Signed-off-by: Fred Jones <fred.jones@foo.org>
- then Joe Smith would upload the patch for the common kernel as
UPSTREAM: important patch from upstream This is the detailed description of the important patch Signed-off-by: Fred Jones <fred.jones@foo.org> Bug: 135791357 Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01 (cherry picked from commit c31e73121f4c1ec41143423ac6ce3ce6dafdcec1) Signed-off-by: Joe Smith <joe.smith@foo.org>
BACKPORT:
instead of UPSTREAM:
.UPSTREAM:
(cherry picked from commit ...)
lineBACKPORT: important patch from upstream This is the detailed description of the important patch Signed-off-by: Fred Jones <fred.jones@foo.org> Bug: 135791357 Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01 (cherry picked from commit c31e73121f4c1ec41143423ac6ce3ce6dafdcec1) [joe: Resolved minor conflict in drivers/foo/bar.c ] Signed-off-by: Joe Smith <joe.smith@foo.org>
FROMGIT:
, FROMLIST:
,FROMGIT:
(cherry picked from commit <sha1> <repo> <branch>)
. This must be a stable maintainer branch (not rebased, so don't use linux-next
for example).BACKPORT: FROMGIT:
important patch from upstream This is the detailed description of the important patch Signed-off-by: Fred Jones <fred.jones@foo.org>
- then Joe Smith would upload the patch for the common kernel as
FROMGIT: important patch from upstream This is the detailed description of the important patch Signed-off-by: Fred Jones <fred.jones@foo.org> Bug: 135791357 (cherry picked from commit 878a2fd9de10b03d11d2f622250285c7e63deace https://git.kernel.org/pub/scm/linux/kernel/git/foo/bar.git test-branch) Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01 Signed-off-by: Joe Smith <joe.smith@foo.org>
FROMLIST:
Link:
tag with a link to the submittal on lore.kernel.orgBug:
tag with the Android bug (required for patches not accepted into a maintainer tree)BACKPORT: FROMLIST:
FROMLIST: important patch from upstream This is the detailed description of the important patch Signed-off-by: Fred Jones <fred.jones@foo.org> Bug: 135791357 Link: https://lore.kernel.org/lkml/20190619171517.GA17557@someone.com/ Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01 Signed-off-by: Joe Smith <joe.smith@foo.org>
ANDROID:
ANDROID:
Fixes:
tag that cites the patch with the bugANDROID: fix android-specific bug in foobar.c This is the detailed description of the important fix Fixes: 1234abcd2468 ("foobar: add cool feature") Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01 Signed-off-by: Joe Smith <joe.smith@foo.org>
ANDROID:
Bug:
tag with the Android bug (required for android-specific features)