This is a note to let you know that I've just added the patch titled
sparc32: Add cmpxchg64().
to the 4.14-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:
sparc32-add-cmpxchg64.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 23198ddffb6cddb5d5824230af4dd4b46e4046a4 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@xxxxxxxxxxxxx>
Date: Wed, 27 Sep 2017 22:38:19 -0700
Subject: sparc32: Add cmpxchg64().
From: David S. Miller <davem@xxxxxxxxxxxxx>
commit 23198ddffb6cddb5d5824230af4dd4b46e4046a4 upstream.
This fixes the build with i40e driver enabled.
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/sparc/include/asm/cmpxchg_32.h | 3 +++
arch/sparc/lib/atomic32.c | 14 ++++++++++++++
2 files changed, 17 insertions(+)
--- a/arch/sparc/include/asm/cmpxchg_32.h
+++ b/arch/sparc/include/asm/cmpxchg_32.h
@@ -63,6 +63,9 @@ __cmpxchg(volatile void *ptr, unsigned l
(unsigned long)_n_, sizeof(*(ptr))); \
})
+u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new);
+#define cmpxchg64(ptr, old, new) __cmpxchg_u64(ptr, old, new)
+
#include <asm-generic/cmpxchg-local.h>
/*
--- a/arch/sparc/lib/atomic32.c
+++ b/arch/sparc/lib/atomic32.c
@@ -173,6 +173,20 @@ unsigned long __cmpxchg_u32(volatile u32
}
EXPORT_SYMBOL(__cmpxchg_u32);
+u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new)
+{
+ unsigned long flags;
+ u64 prev;
+
+ spin_lock_irqsave(ATOMIC_HASH(ptr), flags);
+ if ((prev = *ptr) == old)
+ *ptr = new;
+ spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags);
+
+ return prev;
+}
+EXPORT_SYMBOL(__cmpxchg_u64);
+
unsigned long __xchg_u32(volatile u32 *ptr, u32 new)
{
unsigned long flags;
Patches currently in stable-queue which might be from davem@xxxxxxxxxxxxx are
queue-4.14/sparc64-mmu_context-add-missing-include-files.patch
queue-4.14/sparc32-add-cmpxchg64.patch