On Tue, May 21, 2024 at 02:51:29PM +0000, Oleksandr Tymoshenko wrote:

From: Mark Rutland mark.rutland@arm.com

[ Upstream commit 657eef0a5420a02c02945ed8c87f2ddcbd255772 ]

Currently CONFIG_ARM64_USE_LSE_ATOMICS depends upon CONFIG_JUMP_LABEL, as the inline atomics were indirected with a static branch.

However, since commit:

21fb26bfb01ffe0d ("arm64: alternatives: add alternative_has_feature_*()")

... we use an alternative_branch (which is always available) rather than a static branch, and hence the dependency is unnecessary.

Remove the stale dependency, along with the stale include. This will allow the use of LSE atomics in kernels built with CONFIG_JUMP_LABEL=n, and reduces the risk of circular header dependencies via <asm/lse.h>.

Signed-off-by: Mark Rutland mark.rutland@arm.com Cc: Catalin Marinas catalin.marinas@arm.com Cc: Will Deacon will@kernel.org Link: https://lore.kernel.org/r/20221114125424.2998268-1-mark.rutland@arm.com Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Oleksandr Tymoshenko ovt@google.com

---

arch/arm64/Kconfig | 1 - arch/arm64/include/asm/lse.h | 1 - 2 files changed, 2 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index c15f71501c6c..044b98a62f7b 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1752,7 +1752,6 @@ config ARM64_LSE_ATOMICS config ARM64_USE_LSE_ATOMICS bool "Atomic instructions"

• depends on JUMP_LABEL default y help As part of the Large System Extensions, ARMv8.1 introduces new

diff --git a/arch/arm64/include/asm/lse.h b/arch/arm64/include/asm/lse.h index c503db8e73b0..f99d74826a7e 100644 --- a/arch/arm64/include/asm/lse.h +++ b/arch/arm64/include/asm/lse.h @@ -10,7 +10,6 @@ #include <linux/compiler_types.h> #include <linux/export.h> -#include <linux/jump_label.h> #include <linux/stringify.h> #include <asm/alternative.h> #include <asm/alternative-macros.h>

---

base-commit: 4078fa637fcd80c8487680ec2e4ef7c58308e9aa change-id: 20240521-lse-atomics-6-1-b0960e206035

Best regards,

Oleksandr Tymoshenko ovt@google.com

Now queued up, thanks.

greg k-h