[PATCH v2 5/9] arm64/cpufeature: Use alternatives to check enabled ARM64_HAS_NMI feature

From: Liao Chang
Date: Thu Apr 11 2024 - 02:56:37 EST


Due to the historical reasons, cpus_have_const_cap() is more complicated
than it needs to be. When CONFIG_ARM64_NMI=y the ARM64_HAS_NMI cpucap is
a strict boot cpu feature which is detected and patched early on the
boot cpu, which means no code depends on ARM64_HAS_NMI cpucap run in the
window between the ARM64_HAS_NMI cpucap is detected and alternative is
patched. So it would be nice to migrate caller over to
alternative_has_cap_likey().

Signed-off-by: Liao Chang <liaochang1@xxxxxxxxxx>
---
arch/arm64/include/asm/cpufeature.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index dc8b2d0d3763..4c35565ad656 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -803,7 +803,7 @@ static __always_inline bool system_uses_irq_prio_masking(void)
static __always_inline bool system_uses_nmi(void)
{
return IS_ENABLED(CONFIG_ARM64_NMI) &&
- cpus_have_const_cap(ARM64_USES_NMI);
+ alternative_has_cap_likely(ARM64_USES_NMI);
}

static inline bool system_supports_mte(void)
--
2.34.1