linux-kernel - [PATCH 2/3] RISC-V: K210 defconfigs: Drop redundant MEMBARRIER=n

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Date:   Wed, 30 Mar 2022 16:47:38 -0700
From:   Palmer Dabbelt <palmer@...osinc.com>
To:         linux-riscv@...ts.infradead.org
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>, aou@...s.berkeley.edu,
        anup@...infault.org, heinrich.schuchardt@...onical.com,
        atishp@...shpatra.org, mchitale@...tanamicro.com,
        alexandre.ghiti@...onical.com, damien.lemoal@...nsource.wdc.com,
        axboe@...nel.dk, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Palmer Dabbelt <palmer@...osinc.com>
Subject: [PATCH 2/3] RISC-V: K210 defconfigs: Drop redundant MEMBARRIER=n

From: Palmer Dabbelt <palmer@...osinc.com>

As of 93917ad50972 ("RISC-V: Add support for restartable sequence") we
have support for restartable sequences, which default to enabled.  These
select MEMBARRIER, so disabling it is now redundant.

Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>

---

I'm not actually sure this is the right way to go: presumably the K210
defconfigs had MEMBARRIER=n for a reason (maybe just size?), so we might
actually want to move to RSEQ=n instead?  As usual: I don't test on the
K210, so I'm not exactly sure what the constraints are.
---
 arch/riscv/configs/nommu_k210_defconfig        | 1 -
 arch/riscv/configs/nommu_k210_sdcard_defconfig | 1 -
 arch/riscv/configs/nommu_virt_defconfig        | 1 -
 3 files changed, 3 deletions(-)

diff --git a/arch/riscv/configs/nommu_k210_defconfig b/arch/riscv/configs/nommu_k210_defconfig
index 3f42ed87dde8..2438fa39f8ae 100644
--- a/arch/riscv/configs/nommu_k210_defconfig
+++ b/arch/riscv/configs/nommu_k210_defconfig
@@ -21,7 +21,6 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_AIO is not set
 # CONFIG_IO_URING is not set
 # CONFIG_ADVISE_SYSCALLS is not set
-# CONFIG_MEMBARRIER is not set
 # CONFIG_KALLSYMS is not set
 CONFIG_EMBEDDED=y
 # CONFIG_VM_EVENT_COUNTERS is not set
diff --git a/arch/riscv/configs/nommu_k210_sdcard_defconfig b/arch/riscv/configs/nommu_k210_sdcard_defconfig
index af64b95e88cc..9a133e63ae5b 100644
--- a/arch/riscv/configs/nommu_k210_sdcard_defconfig
+++ b/arch/riscv/configs/nommu_k210_sdcard_defconfig
@@ -13,7 +13,6 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_AIO is not set
 # CONFIG_IO_URING is not set
 # CONFIG_ADVISE_SYSCALLS is not set
-# CONFIG_MEMBARRIER is not set
 # CONFIG_KALLSYMS is not set
 CONFIG_EMBEDDED=y
 # CONFIG_VM_EVENT_COUNTERS is not set
diff --git a/arch/riscv/configs/nommu_virt_defconfig b/arch/riscv/configs/nommu_virt_defconfig
index e1c9864b6237..5269fbb6b4fc 100644
--- a/arch/riscv/configs/nommu_virt_defconfig
+++ b/arch/riscv/configs/nommu_virt_defconfig
@@ -19,7 +19,6 @@ CONFIG_EXPERT=y
 # CONFIG_AIO is not set
 # CONFIG_IO_URING is not set
 # CONFIG_ADVISE_SYSCALLS is not set
-# CONFIG_MEMBARRIER is not set
 # CONFIG_KALLSYMS is not set
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_COMPAT_BRK is not set
-- 
2.34.1