Merge tag 'asoc-v6.18' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next

ASoC: Updates for v6.18

A relatively quiet release for ASoC, we've had a lot of maintainance
work going on and several new drivers but really the most remarkable
thing is that we removed a driver, the WL1273 driver used in some old
Nokia systems that have had the underlying system support removed from
the kernel.

 - Morimoto-san continues his work on cleanups of the core APIs and
   enforcement of abstraction layers.
 - Lots of cleanups and conversions of DT bindings.
 - Substantial maintainance work on the Intel AVS drivers.
 - Support for Qualcomm Glymur and PM4125, Realtek RT1321, Shanghai
   FourSemi FS2104/5S, Texas Instruments PCM1754.
 - Remove support for TI WL1273.

1 files changed, 12 insertions, 4 deletions

diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index d9bb5567af0c..125804fbb5cb 100644
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -1722,12 +1722,9 @@ int futex_mm_init(struct mm_struct *mm)
 	RCU_INIT_POINTER(mm->futex_phash, NULL);
 	mm->futex_phash_new = NULL;
 	/* futex-ref */
+	mm->futex_ref = NULL;
 	atomic_long_set(&mm->futex_atomic, 0);
 	mm->futex_batches = get_state_synchronize_rcu();
-	mm->futex_ref = alloc_percpu(unsigned int);
-	if (!mm->futex_ref)
-		return -ENOMEM;
-	this_cpu_inc(*mm->futex_ref); /* 0 -> 1 */
 	return 0;
 }
 
@@ -1801,6 +1798,17 @@ static int futex_hash_allocate(unsigned int hash_slots, unsigned int flags)
 		}
 	}
 
+	if (!mm->futex_ref) {
+		/*
+		 * This will always be allocated by the first thread and
+		 * therefore requires no locking.
+		 */
+		mm->futex_ref = alloc_percpu(unsigned int);
+		if (!mm->futex_ref)
+			return -ENOMEM;
+		this_cpu_inc(*mm->futex_ref); /* 0 -> 1 */
+	}
+
 	fph = kvzalloc(struct_size(fph, queues, hash_slots),
 		       GFP_KERNEL_ACCOUNT | __GFP_NOWARN);
 	if (!fph)