Patch "powerpc/imc-pmu: Use the correct spinlock initializer." has been added to the 5.15-stable tree

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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 5.15-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-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 8b52563e4794fb7f023064d62286db1297877a22
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 b8a100b9736c7..55a853edc3bea 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,
 };



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