linux-kernel - Re: [PATCH] firmware: add const to bin

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Date:   Thu, 3 Aug 2017 00:28:10 +0300
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Bhumika Goyal <bhumirks@...il.com>
Cc:     julia.lawall@...6.fr, somlo@....edu, linux-kernel@...r.kernel.org,
        qemu-devel@...gnu.org
Subject: Re: [PATCH] firmware: add const to bin_attribute structures

On Wed, Aug 02, 2017 at 02:11:35PM +0530, Bhumika Goyal wrote:
> Add const to bin_attribute structures as they are only passed to the
> functions sysfs_{remove/create}_bin_file. The arguments passed are of
> type const, so declare the structures to be const.
> 
> Done using Coccinelle.
> 
> @m disable optional_qualifier@
> identifier s;
> position p;
> @@
> static struct bin_attribute s@......};
> 
> @okay1@
> position p;
> identifier m.s;
> @@
> (
> sysfs_create_bin_file(...,&s@p,...)
> |
> sysfs_remove_bin_file(...,&s@p,...)
> )
> 
> @bad@
> position p!={m.p,okay1.p};
> identifier m.s;
> @@
> s@p
> 
> @change depends on !bad disable optional_qualifier@
> identifier m.s;
> @@
> static
> +const
> struct bin_attribute s={...};
> 
> Signed-off-by: Bhumika Goyal <bhumirks@...il.com>

For qemu bits:

Acked-by: Michael S. Tsirkin <mst@...hat.com>

Feel free to merge.,

> ---
>  drivers/firmware/dell_rbu.c          | 6 +++---
>  drivers/firmware/dmi-sysfs.c         | 2 +-
>  drivers/firmware/google/gsmi.c       | 2 +-
>  drivers/firmware/google/memconsole.c | 2 +-
>  drivers/firmware/qemu_fw_cfg.c       | 2 +-
>  5 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/firmware/dell_rbu.c b/drivers/firmware/dell_rbu.c
> index 2f452f1..a771360 100644
> --- a/drivers/firmware/dell_rbu.c
> +++ b/drivers/firmware/dell_rbu.c
> @@ -675,18 +675,18 @@ static ssize_t write_rbu_packet_size(struct file *filp, struct kobject *kobj,
>  	return count;
>  }
>  
> -static struct bin_attribute rbu_data_attr = {
> +static const struct bin_attribute rbu_data_attr = {
>  	.attr = {.name = "data", .mode = 0444},
>  	.read = read_rbu_data,
>  };
>  
> -static struct bin_attribute rbu_image_type_attr = {
> +static const struct bin_attribute rbu_image_type_attr = {
>  	.attr = {.name = "image_type", .mode = 0644},
>  	.read = read_rbu_image_type,
>  	.write = write_rbu_image_type,
>  };
>  
> -static struct bin_attribute rbu_packet_size_attr = {
> +static const struct bin_attribute rbu_packet_size_attr = {
>  	.attr = {.name = "packet_size", .mode = 0644},
>  	.read = read_rbu_packet_size,
>  	.write = write_rbu_packet_size,
> diff --git a/drivers/firmware/dmi-sysfs.c b/drivers/firmware/dmi-sysfs.c
> index d5de6ee..936e656 100644
> --- a/drivers/firmware/dmi-sysfs.c
> +++ b/drivers/firmware/dmi-sysfs.c
> @@ -440,7 +440,7 @@ static ssize_t dmi_sel_raw_read(struct file *filp, struct kobject *kobj,
>  	return find_dmi_entry(entry, dmi_sel_raw_read_helper, &state);
>  }
>  
> -static struct bin_attribute dmi_sel_raw_attr = {
> +static const struct bin_attribute dmi_sel_raw_attr = {
>  	.attr = {.name = "raw_event_log", .mode = 0400},
>  	.read = dmi_sel_raw_read,
>  };
> diff --git a/drivers/firmware/google/gsmi.c b/drivers/firmware/google/gsmi.c
> index c8f169b..1ad29f7 100644
> --- a/drivers/firmware/google/gsmi.c
> +++ b/drivers/firmware/google/gsmi.c
> @@ -508,7 +508,7 @@ static ssize_t eventlog_write(struct file *filp, struct kobject *kobj,
>  
>  }
>  
> -static struct bin_attribute eventlog_bin_attr = {
> +static const struct bin_attribute eventlog_bin_attr = {
>  	.attr = {.name = "append_to_eventlog", .mode = 0200},
>  	.write = eventlog_write,
>  };
> diff --git a/drivers/firmware/google/memconsole.c b/drivers/firmware/google/memconsole.c
> index 166f07c..b11a02c 100644
> --- a/drivers/firmware/google/memconsole.c
> +++ b/drivers/firmware/google/memconsole.c
> @@ -33,7 +33,7 @@ static ssize_t memconsole_read(struct file *filp, struct kobject *kobp,
>  	return memconsole_read_func(buf, pos, count);
>  }
>  
> -static struct bin_attribute memconsole_bin_attr = {
> +static const struct bin_attribute memconsole_bin_attr = {
>  	.attr = {.name = "log", .mode = 0444},
>  	.read = memconsole_read,
>  };
> diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c
> index 0e20116..f254977 100644
> --- a/drivers/firmware/qemu_fw_cfg.c
> +++ b/drivers/firmware/qemu_fw_cfg.c
> @@ -343,7 +343,7 @@ static ssize_t fw_cfg_sysfs_read_raw(struct file *filp, struct kobject *kobj,
>  	return count;
>  }
>  
> -static struct bin_attribute fw_cfg_sysfs_attr_raw = {
> +static const struct bin_attribute fw_cfg_sysfs_attr_raw = {
>  	.attr = { .name = "raw", .mode = S_IRUSR },
>  	.read = fw_cfg_sysfs_read_raw,
>  };
> -- 
> 1.9.1