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[PATCH 4/9] riscv: Change check_unaligned_access_speed_all_cpus to void

Andrew Jones posted 9 patches 1 year ago
There is a newer version of this series
[PATCH 4/9] riscv: Change check_unaligned_access_speed_all_cpus to void
Posted by Andrew Jones 1 year ago 
The return value of check_unaligned_access_speed_all_cpus() is always
zero, so make the function void so we don't need to concern ourselves
with it. The change also allows us to tidy up
check_unaligned_access_all_cpus() a bit.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
---
 arch/riscv/kernel/unaligned_access_speed.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c
index 02b485dc4bc4..780f1c5f512a 100644
--- a/arch/riscv/kernel/unaligned_access_speed.c
+++ b/arch/riscv/kernel/unaligned_access_speed.c
@@ -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 __init check_unaligned_access_speed_all_cpus(void)
+static void __init check_unaligned_access_speed_all_cpus(void)
 {
 	unsigned int cpu;
 	unsigned int cpu_count = num_possible_cpus();
@@ -226,7 +226,7 @@ static int __init check_unaligned_access_speed_all_cpus(void)
 
 	if (!bufs) {
 		pr_warn("Allocation failure, not measuring misaligned performance\n");
-		return 0;
+		return;
 	}
 
 	/*
@@ -261,12 +261,10 @@ static int __init check_unaligned_access_speed_all_cpus(void)
 	}
 
 	kfree(bufs);
-	return 0;
 }
 #else /* CONFIG_RISCV_PROBE_UNALIGNED_ACCESS */
-static int __init check_unaligned_access_speed_all_cpus(void)
+static void __init check_unaligned_access_speed_all_cpus(void)
 {
-	return 0;
 }
 #endif
 
@@ -403,10 +401,10 @@ static int __init vec_check_unaligned_access_speed_all_cpus(void *unused __alway
 
 static int __init check_unaligned_access_all_cpus(void)
 {
-	bool all_cpus_emulated;
 	int cpu;
 
-	all_cpus_emulated = check_unaligned_access_emulated_all_cpus();
+	if (!check_unaligned_access_emulated_all_cpus())
+		check_unaligned_access_speed_all_cpus();
 
 	if (!has_vector()) {
 		for_each_online_cpu(cpu)
@@ -417,9 +415,6 @@ static int __init check_unaligned_access_all_cpus(void)
 			    NULL, "vec_check_unaligned_access_speed_all_cpus");
 	}
 
-	if (!all_cpus_emulated)
-		return check_unaligned_access_speed_all_cpus();
-
 	return 0;
 }
 
-- 
2.48.1
Re: [PATCH 4/9] riscv: Change check_unaligned_access_speed_all_cpus to void
Posted by Alexandre Ghiti 12 months ago 
On 07/02/2025 17:19, Andrew Jones wrote:
> The return value of check_unaligned_access_speed_all_cpus() is always
> zero, so make the function void so we don't need to concern ourselves
> with it. The change also allows us to tidy up
> check_unaligned_access_all_cpus() a bit.
>
> Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
> ---
>   arch/riscv/kernel/unaligned_access_speed.c | 15 +++++----------
>   1 file changed, 5 insertions(+), 10 deletions(-)
>
> diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c
> index 02b485dc4bc4..780f1c5f512a 100644
> --- a/arch/riscv/kernel/unaligned_access_speed.c
> +++ b/arch/riscv/kernel/unaligned_access_speed.c
> @@ -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 __init check_unaligned_access_speed_all_cpus(void)
> +static void __init check_unaligned_access_speed_all_cpus(void)
>   {
>   	unsigned int cpu;
>   	unsigned int cpu_count = num_possible_cpus();
> @@ -226,7 +226,7 @@ static int __init check_unaligned_access_speed_all_cpus(void)
>   
>   	if (!bufs) {
>   		pr_warn("Allocation failure, not measuring misaligned performance\n");
> -		return 0;
> +		return;
>   	}
>   
>   	/*
> @@ -261,12 +261,10 @@ static int __init check_unaligned_access_speed_all_cpus(void)
>   	}
>   
>   	kfree(bufs);
> -	return 0;
>   }
>   #else /* CONFIG_RISCV_PROBE_UNALIGNED_ACCESS */
> -static int __init check_unaligned_access_speed_all_cpus(void)
> +static void __init check_unaligned_access_speed_all_cpus(void)
>   {
> -	return 0;
>   }
>   #endif
>   
> @@ -403,10 +401,10 @@ static int __init vec_check_unaligned_access_speed_all_cpus(void *unused __alway
>   
>   static int __init check_unaligned_access_all_cpus(void)
>   {
> -	bool all_cpus_emulated;
>   	int cpu;
>   
> -	all_cpus_emulated = check_unaligned_access_emulated_all_cpus();
> +	if (!check_unaligned_access_emulated_all_cpus())
> +		check_unaligned_access_speed_all_cpus();
>   
>   	if (!has_vector()) {
>   		for_each_online_cpu(cpu)
> @@ -417,9 +415,6 @@ static int __init check_unaligned_access_all_cpus(void)
>   			    NULL, "vec_check_unaligned_access_speed_all_cpus");
>   	}
>   
> -	if (!all_cpus_emulated)
> -		return check_unaligned_access_speed_all_cpus();
> -
>   	return 0;
>   }
>   

Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>

Thanks,

Alex
Re: [PATCH 4/9] riscv: Change check_unaligned_access_speed_all_cpus to void
Posted by Clément Léger 1 year ago 

On 07/02/2025 17:19, Andrew Jones wrote:
> The return value of check_unaligned_access_speed_all_cpus() is always
> zero, so make the function void so we don't need to concern ourselves
> with it. The change also allows us to tidy up
> check_unaligned_access_all_cpus() a bit.
> 
> Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
> ---
>  arch/riscv/kernel/unaligned_access_speed.c | 15 +++++----------
>  1 file changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c
> index 02b485dc4bc4..780f1c5f512a 100644
> --- a/arch/riscv/kernel/unaligned_access_speed.c
> +++ b/arch/riscv/kernel/unaligned_access_speed.c
> @@ -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 __init check_unaligned_access_speed_all_cpus(void)
> +static void __init check_unaligned_access_speed_all_cpus(void)
>  {
>  	unsigned int cpu;
>  	unsigned int cpu_count = num_possible_cpus();
> @@ -226,7 +226,7 @@ static int __init check_unaligned_access_speed_all_cpus(void)
>  
>  	if (!bufs) {
>  		pr_warn("Allocation failure, not measuring misaligned performance\n");
> -		return 0;
> +		return;
>  	}
>  
>  	/*
> @@ -261,12 +261,10 @@ static int __init check_unaligned_access_speed_all_cpus(void)
>  	}
>  
>  	kfree(bufs);
> -	return 0;
>  }
>  #else /* CONFIG_RISCV_PROBE_UNALIGNED_ACCESS */
> -static int __init check_unaligned_access_speed_all_cpus(void)
> +static void __init check_unaligned_access_speed_all_cpus(void)
>  {
> -	return 0;
>  }
>  #endif
>  
> @@ -403,10 +401,10 @@ static int __init vec_check_unaligned_access_speed_all_cpus(void *unused __alway
>  
>  static int __init check_unaligned_access_all_cpus(void)
>  {
> -	bool all_cpus_emulated;
>  	int cpu;
>  
> -	all_cpus_emulated = check_unaligned_access_emulated_all_cpus();
> +	if (!check_unaligned_access_emulated_all_cpus())
> +		check_unaligned_access_speed_all_cpus();
>  
>  	if (!has_vector()) {
>  		for_each_online_cpu(cpu)
> @@ -417,9 +415,6 @@ static int __init check_unaligned_access_all_cpus(void)
>  			    NULL, "vec_check_unaligned_access_speed_all_cpus");
>  	}
>  
> -	if (!all_cpus_emulated)
> -		return check_unaligned_access_speed_all_cpus();
> -
>  	return 0;
>  }
>  

Hi Andrew,

I had a similar patch in an upcoming series but you were faster !

Reviewed-by: Clément Léger <cleger@rivosinc.com>

Thanks,

Clément

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