From bdab18633a302c82b5e5d5dbc4e38b0baf9c0837 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 20 Sep 2026 08:15:23 -0700
Subject: Merge tag 'locking-urgent-2026-09-20' of
 git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull futex fix from Ingo Molnar:

 - Also allocate a default private futex hash on vfork() as well, to
   avoid races with (private) futex waiters (Peter Zijlstra)

* tag 'locking-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Also allocate private hash on vfork()
---
 arch/powerpc/lib/string.S | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 arch/powerpc/lib/string.S

(limited to 'arch/powerpc/lib/string.S')

diff --git a/arch/powerpc/lib/string.S b/arch/powerpc/lib/string.S
new file mode 100644
index 000000000..c3f5e7d31
--- /dev/null
+++ b/arch/powerpc/lib/string.S
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * String handling functions for PowerPC.
+ *
+ * Copyright (C) 1996 Paul Mackerras.
+ */
+#include <linux/export.h>
+#include <asm/ppc_asm.h>
+#include <asm/cache.h>
+
+	.text
+	
+_GLOBAL(strncmp)
+	PPC_LCMPI 0,r5,0
+	beq-	2f
+	mtctr	r5
+	addi	r5,r3,-1
+	addi	r4,r4,-1
+	.balign IFETCH_ALIGN_BYTES
+1:	lbzu	r3,1(r5)
+	cmpwi	1,r3,0
+	lbzu	r0,1(r4)
+	subf.	r3,r0,r3
+	beqlr	1
+	bdnzt	eq,1b
+	blr
+2:	li	r3,0
+	blr
+EXPORT_SYMBOL(strncmp)
+
+_GLOBAL(memchr)
+	PPC_LCMPI 0,r5,0
+	beq-	2f
+	mtctr	r5
+	addi	r3,r3,-1
+	.balign IFETCH_ALIGN_BYTES
+1:	lbzu	r0,1(r3)
+	cmpw	0,r0,r4
+	bdnzf	2,1b
+	beqlr
+2:	li	r3,0
+	blr
+EXPORT_SYMBOL(memchr)
-- 
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