[PATCH v4 2/7] arm64: cpu: Add accessor for boot_cpu_data
From: Raphael Gault <hidden>
Date: 2019-08-22 14:43:03
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Mark boot_cpu_data as read-only after initialization. Define accessor to read boot_cpu_data from outside of boot_cpu_data. Signed-off-by: Raphael Gault <redacted> --- arch/arm64/include/asm/cpu.h | 2 +- arch/arm64/kernel/cpuinfo.c | 7 ++++++- 2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/cpu.h b/arch/arm64/include/asm/cpu.h
index d72d995b7e25..6abc2faf1a64 100644
--- a/arch/arm64/include/asm/cpu.h
+++ b/arch/arm64/include/asm/cpu.h@@ -62,5 +62,5 @@ void __init cpuinfo_store_boot_cpu(void); void __init init_cpu_features(struct cpuinfo_arm64 *info); void update_cpu_features(int cpu, struct cpuinfo_arm64 *info, struct cpuinfo_arm64 *boot); - +struct cpuinfo_arm64 *get_boot_cpu_data(void); #endif /* __ASM_CPU_H */
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 876055e37352..ffa00b3a148b 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c@@ -31,7 +31,7 @@ * values depending on configuration at or after reset. */ DEFINE_PER_CPU(struct cpuinfo_arm64, cpu_data); -static struct cpuinfo_arm64 boot_cpu_data; +static struct cpuinfo_arm64 boot_cpu_data __ro_after_init; static char *icache_policy_str[] = { [0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN",
@@ -395,4 +395,9 @@ void __init cpuinfo_store_boot_cpu(void) init_cpu_features(&boot_cpu_data); } +struct cpuinfo_arm64 *get_boot_cpu_data(void) +{ + return &boot_cpu_data; +} + device_initcall(cpuinfo_regs_init);
--
2.17.1
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