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| author | Michael Bestas <mkbestas@lineageos.org> | 2021-02-07 15:45:02 +0200 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2021-02-07 15:45:02 +0200 |
| commit | 32ed4c6cace37c492b7deacdf3fa223618b1ad2e (patch) | |
| tree | 0d247f7c30832c3137d9a868f95df59b19bf7712 /kernel/trace | |
| parent | 4d2544c30eab39bfe0eed6027fe4059f58ee91ad (diff) | |
| parent | 0566f6529a7b8d15d8ff50797331717b346f9aa4 (diff) | |
Merge branch 'android-4.4-p' of https://android.googlesource.com/kernel/common into lineage-18.1-caf-msm8998
This brings LA.UM.9.2.r1-02000-SDMxx0.0 up to date with
https://android.googlesource.com/kernel/common/ android-4.4-p at commit:
0566f6529a7b8 Merge 4.4.255 into android-4.4-p
Conflicts:
drivers/scsi/ufs/ufshcd.c
drivers/usb/gadget/function/f_accessory.c
drivers/usb/gadget/function/f_uac2.c
net/core/skbuff.c
Change-Id: I327c7f3793e872609f33f2a8e70eba7b580d70f3
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 547a3a5ac57b..1ec760f6bf58 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -4294,6 +4294,8 @@ void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu) if (!cpumask_test_cpu(cpu, buffer->cpumask)) return; + /* prevent another thread from changing buffer sizes */ + mutex_lock(&buffer->mutex); atomic_inc(&buffer->resize_disabled); atomic_inc(&cpu_buffer->record_disabled); @@ -4317,6 +4319,8 @@ void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu) atomic_dec(&cpu_buffer->record_disabled); atomic_dec(&buffer->resize_disabled); + + mutex_unlock(&buffer->mutex); } EXPORT_SYMBOL_GPL(ring_buffer_reset_cpu); |