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0899a6278a
There are two variants of system_uses_lse_atomics(), depending on CONFIG_ARM64_LSE_ATOMICS. The function isn't called anywhere when CONFIG_ARM64_LSE_ATOMICS is disabled. It can be directly replaced by alternative_has_cap_likely(ARM64_HAS_LSE_ATOMICS) when the kernel option is enabled. No need to keep system_uses_lse_atomics() and just remove it. Signed-off-by: Gavin Shan <gshan@redhat.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20231017005036.334067-1-gshan@redhat.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
38 lines
933 B
C
38 lines
933 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_LSE_H
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#define __ASM_LSE_H
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#include <asm/atomic_ll_sc.h>
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#ifdef CONFIG_ARM64_LSE_ATOMICS
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#define __LSE_PREAMBLE ".arch_extension lse\n"
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#include <linux/compiler_types.h>
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#include <linux/export.h>
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#include <linux/stringify.h>
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#include <asm/alternative.h>
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#include <asm/alternative-macros.h>
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#include <asm/atomic_lse.h>
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#include <asm/cpucaps.h>
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#define __lse_ll_sc_body(op, ...) \
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({ \
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alternative_has_cap_likely(ARM64_HAS_LSE_ATOMICS) ? \
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__lse_##op(__VA_ARGS__) : \
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__ll_sc_##op(__VA_ARGS__); \
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})
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/* In-line patching at runtime */
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#define ARM64_LSE_ATOMIC_INSN(llsc, lse) \
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ALTERNATIVE(llsc, __LSE_PREAMBLE lse, ARM64_HAS_LSE_ATOMICS)
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#else /* CONFIG_ARM64_LSE_ATOMICS */
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#define __lse_ll_sc_body(op, ...) __ll_sc_##op(__VA_ARGS__)
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#define ARM64_LSE_ATOMIC_INSN(llsc, lse) llsc
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#endif /* CONFIG_ARM64_LSE_ATOMICS */
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#endif /* __ASM_LSE_H */
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