* [PATCH 1/1] riscv: Select ARCH_SUPPORTS_ATOMIC_RMW by default
@ 2020-06-02 0:54 Chenxi Mao
2020-06-05 0:01 ` Palmer Dabbelt
0 siblings, 1 reply; 3+ messages in thread
From: Chenxi Mao @ 2020-06-02 0:54 UTC (permalink / raw)
To: paul.walmsley; +Cc: maochenxi, linux-riscv, aou, palmer, linux-kernel
Enable ARCH_SUPPORTS_ATOMIC_RMW by default to support
osq_lock in mutex/rwsem locks.
---
arch/riscv/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index a31e1a41913a..cbdc605d20d9 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -68,6 +68,7 @@ config RISCV
select ARCH_HAS_GCOV_PROFILE_ALL
select HAVE_COPY_THREAD_TLS
select HAVE_ARCH_KASAN if MMU && 64BIT
+ select ARCH_SUPPORTS_ATOMIC_RMW
config ARCH_MMAP_RND_BITS_MIN
default 18 if 64BIT
--
2.25.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH 1/1] riscv: Select ARCH_SUPPORTS_ATOMIC_RMW by default
2020-06-02 0:54 [PATCH 1/1] riscv: Select ARCH_SUPPORTS_ATOMIC_RMW by default Chenxi Mao
@ 2020-06-05 0:01 ` Palmer Dabbelt
0 siblings, 0 replies; 3+ messages in thread
From: Palmer Dabbelt @ 2020-06-05 0:01 UTC (permalink / raw)
To: maochenxi; +Cc: linux-riscv, aou, maochenxi, linux-kernel, Paul Walmsley
On Mon, 01 Jun 2020 17:54:28 PDT (-0700), maochenxi@eswin.com wrote:
> Enable ARCH_SUPPORTS_ATOMIC_RMW by default to support
> osq_lock in mutex/rwsem locks.
> ---
> arch/riscv/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index a31e1a41913a..cbdc605d20d9 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -68,6 +68,7 @@ config RISCV
> select ARCH_HAS_GCOV_PROFILE_ALL
> select HAVE_COPY_THREAD_TLS
> select HAVE_ARCH_KASAN if MMU && 64BIT
> + select ARCH_SUPPORTS_ATOMIC_RMW
>
> config ARCH_MMAP_RND_BITS_MIN
> default 18 if 64BIT
You need a Signed-off-by for all patches, even small ones like this. I'm also
going to consider this a bit too large of a change to take during the merge
window: there's very little code, but it dramatically changes the behavior of
the system -- in other words, it's a 5.9 candidate, not a 5.8 one.
Thanks!
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH 1/1] riscv: Select ARCH_SUPPORTS_ATOMIC_RMW by default
@ 2020-06-05 3:34 Chenxi Mao
0 siblings, 0 replies; 3+ messages in thread
From: Chenxi Mao @ 2020-06-05 3:34 UTC (permalink / raw)
To: paul.walmsley; +Cc: maochenxi, linux-riscv, aou, palmer, linux-kernel
Select ARCH_SUPPORTS_ATOMIC_RMW by default to enabel osqlocks.
PS2: Add signed off info.
Signed-off-by: Chenxi Mao <maochenxi@eswin.com>
---
arch/riscv/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index a31e1a41913a..cbdc605d20d9 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -68,6 +68,7 @@ config RISCV
select ARCH_HAS_GCOV_PROFILE_ALL
select HAVE_COPY_THREAD_TLS
select HAVE_ARCH_KASAN if MMU && 64BIT
+ select ARCH_SUPPORTS_ATOMIC_RMW
config ARCH_MMAP_RND_BITS_MIN
default 18 if 64BIT
--
2.25.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
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