linux-kernel - [PATCH] RISC-V: hwprobe: Remove __init on probe_vendor

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Date:   Thu, 20 Apr 2023 12:49:34 -0700
From:   Evan Green <evan@...osinc.com>
To:     Palmer Dabbelt <palmer@...osinc.com>
Cc:     Evan Green <evan@...osinc.com>, Albert Ou <aou@...s.berkeley.edu>,
        Andrew Jones <ajones@...tanamicro.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Guo Ren <guoren@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
        Jisheng Zhang <jszhang@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Philipp Tomsich <philipp.tomsich@...ll.eu>,
        Samuel Holland <samuel@...lland.org>,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: [PATCH] RISC-V: hwprobe: Remove __init on probe_vendor_features()

probe_vendor_features() is now called from smp_callin(), which is not
__init code and runs during cpu hotplug events. Remove the
__init_or_module decoration from it and the functions it calls to avoid
walking into outer space.

Fixes: 62a31d6e38bd ("RISC-V: hwprobe: Support probing of misaligned access performance")

Signed-off-by: Evan Green <evan@...osinc.com>
---

 arch/riscv/errata/thead/errata.c     | 6 +++---
 arch/riscv/include/asm/alternative.h | 2 +-
 arch/riscv/kernel/alternative.c      | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/riscv/errata/thead/errata.c b/arch/riscv/errata/thead/errata.c
index 1036b8f933ec..a86c4facc2a6 100644
--- a/arch/riscv/errata/thead/errata.c
+++ b/arch/riscv/errata/thead/errata.c
@@ -118,9 +118,9 @@ void __init_or_module thead_errata_patch_func(struct alt_entry *begin, struct al
 		local_flush_icache_all();
 }
 
-void __init_or_module thead_feature_probe_func(unsigned int cpu,
-					       unsigned long archid,
-					       unsigned long impid)
+void thead_feature_probe_func(unsigned int cpu,
+			      unsigned long archid,
+			      unsigned long impid)
 {
 	if ((archid == 0) && (impid == 0))
 		per_cpu(misaligned_access_speed, cpu) = RISCV_HWPROBE_MISALIGNED_FAST;
diff --git a/arch/riscv/include/asm/alternative.h b/arch/riscv/include/asm/alternative.h
index a8f5cf6694a1..6a41537826a7 100644
--- a/arch/riscv/include/asm/alternative.h
+++ b/arch/riscv/include/asm/alternative.h
@@ -30,7 +30,7 @@
 #define ALT_OLD_PTR(a)			__ALT_PTR(a, old_offset)
 #define ALT_ALT_PTR(a)			__ALT_PTR(a, alt_offset)
 
-void __init probe_vendor_features(unsigned int cpu);
+void probe_vendor_features(unsigned int cpu);
 void __init apply_boot_alternatives(void);
 void __init apply_early_boot_alternatives(void);
 void apply_module_alternatives(void *start, size_t length);
diff --git a/arch/riscv/kernel/alternative.c b/arch/riscv/kernel/alternative.c
index fc65c9293ac5..6b75788c18e6 100644
--- a/arch/riscv/kernel/alternative.c
+++ b/arch/riscv/kernel/alternative.c
@@ -31,7 +31,7 @@ struct cpu_manufacturer_info_t {
 				   unsigned long impid);
 };
 
-static void __init_or_module riscv_fill_cpu_mfr_info(struct cpu_manufacturer_info_t *cpu_mfr_info)
+static void riscv_fill_cpu_mfr_info(struct cpu_manufacturer_info_t *cpu_mfr_info)
 {
 #ifdef CONFIG_RISCV_M_MODE
 	cpu_mfr_info->vendor_id = csr_read(CSR_MVENDORID);
@@ -144,7 +144,7 @@ void riscv_alternative_fix_offsets(void *alt_ptr, unsigned int len,
 }
 
 /* Called on each CPU as it starts */
-void __init_or_module probe_vendor_features(unsigned int cpu)
+void probe_vendor_features(unsigned int cpu)
 {
 	struct cpu_manufacturer_info_t cpu_mfr_info;
 
-- 
2.25.1