linux-kernel - [PATCH 1/9] riscv: Annotate unaligned access init functions

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Message-ID: <20250207161939.46139-12-ajones@ventanamicro.com>
Date: Fri,  7 Feb 2025 17:19:41 +0100
From: Andrew Jones <ajones@...tanamicro.com>
To: linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: paul.walmsley@...ive.com,
	palmer@...belt.com,
	charlie@...osinc.com,
	jesse@...osinc.com,
	Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH 1/9] riscv: Annotate unaligned access init functions

Several functions used in unaligned access probing are only run at
init time. Annotate them appropriately.

Fixes: f413aae96cda ("riscv: Set unaligned access speed at compile time")
Signed-off-by: Andrew Jones <ajones@...tanamicro.com>
---
 arch/riscv/include/asm/cpufeature.h        |  4 ++--
 arch/riscv/kernel/traps_misaligned.c       |  8 ++++----
 arch/riscv/kernel/unaligned_access_speed.c | 14 +++++++-------
 3 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/arch/riscv/include/asm/cpufeature.h b/arch/riscv/include/asm/cpufeature.h
index 569140d6e639..19defdc2002d 100644
--- a/arch/riscv/include/asm/cpufeature.h
+++ b/arch/riscv/include/asm/cpufeature.h
@@ -63,7 +63,7 @@ void __init riscv_user_isa_enable(void);
 #define __RISCV_ISA_EXT_SUPERSET_VALIDATE(_name, _id, _sub_exts, _validate) \
 	_RISCV_ISA_EXT_DATA(_name, _id, _sub_exts, ARRAY_SIZE(_sub_exts), _validate)
 
-bool check_unaligned_access_emulated_all_cpus(void);
+bool __init check_unaligned_access_emulated_all_cpus(void);
 #if defined(CONFIG_RISCV_SCALAR_MISALIGNED)
 void check_unaligned_access_emulated(struct work_struct *work __always_unused);
 void unaligned_emulation_finish(void);
@@ -76,7 +76,7 @@ static inline bool unaligned_ctl_available(void)
 }
 #endif
 
-bool check_vector_unaligned_access_emulated_all_cpus(void);
+bool __init check_vector_unaligned_access_emulated_all_cpus(void);
 #if defined(CONFIG_RISCV_VECTOR_MISALIGNED)
 void check_vector_unaligned_access_emulated(struct work_struct *work __always_unused);
 DECLARE_PER_CPU(long, vector_misaligned_access);
diff --git a/arch/riscv/kernel/traps_misaligned.c b/arch/riscv/kernel/traps_misaligned.c
index 7cc108aed74e..aacbd9d7196e 100644
--- a/arch/riscv/kernel/traps_misaligned.c
+++ b/arch/riscv/kernel/traps_misaligned.c
@@ -605,7 +605,7 @@ void check_vector_unaligned_access_emulated(struct work_struct *work __always_un
 	kernel_vector_end();
 }
 
-bool check_vector_unaligned_access_emulated_all_cpus(void)
+bool __init check_vector_unaligned_access_emulated_all_cpus(void)
 {
 	int cpu;
 
@@ -625,7 +625,7 @@ bool check_vector_unaligned_access_emulated_all_cpus(void)
 	return true;
 }
 #else
-bool check_vector_unaligned_access_emulated_all_cpus(void)
+bool __init check_vector_unaligned_access_emulated_all_cpus(void)
 {
 	return false;
 }
@@ -659,7 +659,7 @@ void check_unaligned_access_emulated(struct work_struct *work __always_unused)
 	}
 }
 
-bool check_unaligned_access_emulated_all_cpus(void)
+bool __init check_unaligned_access_emulated_all_cpus(void)
 {
 	int cpu;
 
@@ -684,7 +684,7 @@ bool unaligned_ctl_available(void)
 	return unaligned_ctl;
 }
 #else
-bool check_unaligned_access_emulated_all_cpus(void)
+bool __init check_unaligned_access_emulated_all_cpus(void)
 {
 	return false;
 }
diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c
index 91f189cf1611..b7a8ff7ba6df 100644
--- a/arch/riscv/kernel/unaligned_access_speed.c
+++ b/arch/riscv/kernel/unaligned_access_speed.c
@@ -121,7 +121,7 @@ static int check_unaligned_access(void *param)
 	return 0;
 }
 
-static void check_unaligned_access_nonboot_cpu(void *param)
+static void __init check_unaligned_access_nonboot_cpu(void *param)
 {
 	unsigned int cpu = smp_processor_id();
 	struct page **pages = param;
@@ -175,7 +175,7 @@ static void set_unaligned_access_static_branches(void)
 	modify_unaligned_access_branches(&fast_and_online, num_online_cpus());
 }
 
-static int lock_and_set_unaligned_access_static_branch(void)
+static int __init lock_and_set_unaligned_access_static_branch(void)
 {
 	cpus_read_lock();
 	set_unaligned_access_static_branches();
@@ -218,7 +218,7 @@ static int riscv_offline_cpu(unsigned int cpu)
 }
 
 /* Measure unaligned access speed on all CPUs present at boot in parallel. */
-static int check_unaligned_access_speed_all_cpus(void)
+static int __init check_unaligned_access_speed_all_cpus(void)
 {
 	unsigned int cpu;
 	unsigned int cpu_count = num_possible_cpus();
@@ -264,7 +264,7 @@ static int check_unaligned_access_speed_all_cpus(void)
 	return 0;
 }
 #else /* CONFIG_RISCV_PROBE_UNALIGNED_ACCESS */
-static int check_unaligned_access_speed_all_cpus(void)
+static int __init check_unaligned_access_speed_all_cpus(void)
 {
 	return 0;
 }
@@ -379,7 +379,7 @@ static int riscv_online_cpu_vec(unsigned int cpu)
 }
 
 /* Measure unaligned access speed on all CPUs present at boot in parallel. */
-static int vec_check_unaligned_access_speed_all_cpus(void *unused __always_unused)
+static int __init vec_check_unaligned_access_speed_all_cpus(void *unused __always_unused)
 {
 	schedule_on_each_cpu(check_vector_unaligned_access);
 
@@ -393,13 +393,13 @@ static int vec_check_unaligned_access_speed_all_cpus(void *unused __always_unuse
 	return 0;
 }
 #else /* CONFIG_RISCV_PROBE_VECTOR_UNALIGNED_ACCESS */
-static int vec_check_unaligned_access_speed_all_cpus(void *unused __always_unused)
+static int __init vec_check_unaligned_access_speed_all_cpus(void *unused __always_unused)
 {
 	return 0;
 }
 #endif
 
-static int check_unaligned_access_all_cpus(void)
+static int __init check_unaligned_access_all_cpus(void)
 {
 	bool all_cpus_emulated, all_cpus_vec_unsupported;
 
-- 
2.48.1