From: Ard Biesheuvel <ardb@kernel.org>

Provide cmpxchg64_local() for hexagon so we can start using it in
generic code.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/arc/include/asm/cmpxchg.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h
index 76f43db0890f..f2d55823645c 100644
--- a/arch/arc/include/asm/cmpxchg.h
+++ b/arch/arc/include/asm/cmpxchg.h
@@ -12,6 +12,7 @@
 
 #include <asm/barrier.h>
 #include <asm/smp.h>
+#include <asm-generic/cmpxchg-local.h>
 
 #ifdef CONFIG_ARC_HAS_LLSC
 
@@ -142,4 +143,6 @@
 
 #endif
 
+#define arch_cmpxchg64_local __generic_cmpxchg64_local
+
 #endif
-- 
2.52.0.107.ga0afd4fd5b-goog

On Thu, Nov 27, 2025 at 10:22:29AM +0100, Ard Biesheuvel wrote:
> From: Ard Biesheuvel <ardb@kernel.org>
> 
> Provide cmpxchg64_local() for hexagon so we can start using it in
> generic code.

nit: this is for arc, not hexagon.

Thanks,
Joey

> 
> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
> ---
>  arch/arc/include/asm/cmpxchg.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h
> index 76f43db0890f..f2d55823645c 100644
> --- a/arch/arc/include/asm/cmpxchg.h
> +++ b/arch/arc/include/asm/cmpxchg.h
> @@ -12,6 +12,7 @@
>  
>  #include <asm/barrier.h>
>  #include <asm/smp.h>
> +#include <asm-generic/cmpxchg-local.h>
>  
>  #ifdef CONFIG_ARC_HAS_LLSC
>  
> @@ -142,4 +143,6 @@
>  
>  #endif
>  
> +#define arch_cmpxchg64_local __generic_cmpxchg64_local
> +
>  #endif
> -- 
> 2.52.0.107.ga0afd4fd5b-goog
> 
>