This is a note to let you know that I've just added the patch titled
powerpc/imc-pmu: Use the correct spinlock initializer.
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-imc-pmu-use-the-correct-spinlock-initializer.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e49e1f6ac1dbefc16de9fa0f9319080d601055de
Author: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Date: Thu Mar 9 14:48:31 2023 +0100
powerpc/imc-pmu: Use the correct spinlock initializer.
[ Upstream commit 007240d59c11f87ac4f6cfc6a1d116630b6b634c ]
The macro __SPIN_LOCK_INITIALIZER() is implementation specific. Users
that desire to initialize a spinlock in a struct must use
__SPIN_LOCK_UNLOCKED().
Use __SPIN_LOCK_UNLOCKED() for the spinlock_t in imc_global_refc.
Fixes: 76d588dddc459 ("powerpc/imc-pmu: Fix use of mutex in IRQs disabled section")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://msgid.link/20230309134831.Nz12nqsU@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index d42f2e091201a..872313021eaa8 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c
@@ -50,7 +50,7 @@ static int trace_imc_mem_size;
* core and trace-imc
*/
static struct imc_pmu_ref imc_global_refc = {
- .lock = __SPIN_LOCK_INITIALIZER(imc_global_refc.lock),
+ .lock = __SPIN_LOCK_UNLOCKED(imc_global_refc.lock),
.id = 0,
.refc = 0,
};
