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treewide: Use sysfs_bin_attr_simple_read() helper

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Deduplicate ->read() callbacks of bin_attributes which are backed by a
simple buffer in memory:

Use the newly introduced sysfs_bin_attr_simple_read() helper instead,
either by referencing it directly or by declaring such bin_attributes
with BIN_ATTR_SIMPLE_RO() or BIN_ATTR_SIMPLE_ADMIN_RO().

Aside from a reduction of LoC, this shaves off a few bytes from vmlinux
(304 bytes on an x86_64 allyesconfig).

No functional change intended.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Zhi Wang <zhiwang@kernel.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/92ee0a0e83a5a3f3474845db6c8575297698933a.1712410202.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lukas Wunner 2024-04-06 15:52:02 +02:00 committed by Greg Kroah-Hartman
parent d48c03198a
commit 66bc1a1733
8 changed files with 14 additions and 85 deletions
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10
arch/powerpc/platforms/powernv/opal.c
View File

@ -792,14 +792,6 @@ static int __init opal_sysfs_init(void)
return 0;
}
static ssize_t export_attr_read(struct file *fp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
loff_t off, size_t count)
{
return memory_read_from_buffer(buf, count, &off, bin_attr->private,
bin_attr->size);
}
static int opal_add_one_export(struct kobject *parent, const char *export_name,
struct device_node *np, const char *prop_name)
{
@ -826,7 +818,7 @@ static int opal_add_one_export(struct kobject *parent, const char *export_name,
sysfs_bin_attr_init(attr);
attr->attr.name = name;
attr->attr.mode = 0400;
attr->read = export_attr_read;
attr->read = sysfs_bin_attr_simple_read;
attr->private = __va(vals[0]);
attr->size = vals[1];

9
drivers/acpi/bgrt.c
View File

@ -29,14 +29,7 @@ BGRT_SHOW(type, image_type);
BGRT_SHOW(xoffset, image_offset_x);
BGRT_SHOW(yoffset, image_offset_y);
static ssize_t image_read(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buf, loff_t off, size_t count)
{
memcpy(buf, attr->private + off, count);
return count;
}
static BIN_ATTR_RO(image, 0); /* size gets filled in later */
static BIN_ATTR_SIMPLE_RO(image);
static struct attribute *bgrt_attributes[] = {
&bgrt_attr_version.attr,

12
drivers/firmware/dmi_scan.c
View File

@ -746,16 +746,8 @@ static void __init dmi_scan_machine(void)
pr_info("DMI not present or invalid.\n");
}
static ssize_t raw_table_read(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t count)
{
memcpy(buf, attr->private + pos, count);
return count;
}
static BIN_ATTR(smbios_entry_point, S_IRUSR, raw_table_read, NULL, 0);
static BIN_ATTR(DMI, S_IRUSR, raw_table_read, NULL, 0);
static BIN_ATTR_SIMPLE_ADMIN_RO(smbios_entry_point);
static BIN_ATTR_SIMPLE_ADMIN_RO(DMI);
static int __init dmi_init(void)
{

10
drivers/firmware/efi/rci2-table.c
View File

@ -40,15 +40,7 @@ static u8 *rci2_base;
static u32 rci2_table_len;
unsigned long rci2_table_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
static ssize_t raw_table_read(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t count)
{
memcpy(buf, attr->private + pos, count);
return count;
}
static BIN_ATTR(rci2, S_IRUSR, raw_table_read, NULL, 0);
static BIN_ATTR_SIMPLE_ADMIN_RO(rci2);
static u16 checksum(void)
{

26
drivers/gpu/drm/i915/gvt/firmware.c
View File

@ -50,21 +50,7 @@ struct gvt_firmware_header {
#define dev_to_drm_minor(d) dev_get_drvdata((d))
static ssize_t
gvt_firmware_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t offset, size_t count)
{
memcpy(buf, attr->private + offset, count);
return count;
}
static struct bin_attribute firmware_attr = {
.attr = {.name = "gvt_firmware", .mode = (S_IRUSR)},
.read = gvt_firmware_read,
.write = NULL,
.mmap = NULL,
};
static BIN_ATTR_SIMPLE_ADMIN_RO(gvt_firmware);
static int expose_firmware_sysfs(struct intel_gvt *gvt)
{
@ -107,10 +93,10 @@ static int expose_firmware_sysfs(struct intel_gvt *gvt)
crc32_start = offsetof(struct gvt_firmware_header, version);
h->crc32 = crc32_le(0, firmware + crc32_start, size - crc32_start);
firmware_attr.size = size;
firmware_attr.private = firmware;
bin_attr_gvt_firmware.size = size;
bin_attr_gvt_firmware.private = firmware;
ret = device_create_bin_file(&pdev->dev, &firmware_attr);
ret = device_create_bin_file(&pdev->dev, &bin_attr_gvt_firmware);
if (ret) {
vfree(firmware);
return ret;
@ -122,8 +108,8 @@ static void clean_firmware_sysfs(struct intel_gvt *gvt)
{
struct pci_dev *pdev = to_pci_dev(gvt->gt->i915->drm.dev);
device_remove_bin_file(&pdev->dev, &firmware_attr);
vfree(firmware_attr.private);
device_remove_bin_file(&pdev->dev, &bin_attr_gvt_firmware);
vfree(bin_attr_gvt_firmware.private);
}
/**

9
drivers/thermal/intel/int340x_thermal/int3400_thermal.c
View File

@ -73,14 +73,7 @@ struct odvp_attr {
struct device_attribute attr;
};
static ssize_t data_vault_read(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buf, loff_t off, size_t count)
{
memcpy(buf, attr->private + off, count);
return count;
}
static BIN_ATTR_RO(data_vault, 0);
static BIN_ATTR_SIMPLE_RO(data_vault);
static struct bin_attribute *data_attributes[] = {
&bin_attr_data_vault,

10
init/initramfs.c
View File

@ -575,15 +575,7 @@ extern unsigned long __initramfs_size;
#include <linux/initrd.h>
#include <linux/kexec.h>
static ssize_t raw_read(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t count)
{
memcpy(buf, attr->private + pos, count);
return count;
}
static BIN_ATTR(initrd, 0440, raw_read, NULL, 0);
static BIN_ATTR(initrd, 0440, sysfs_bin_attr_simple_read, NULL, 0);
void __init reserve_initrd_mem(void)
{

13
kernel/module/sysfs.c
View File

@ -146,17 +146,6 @@ struct module_notes_attrs {
struct bin_attribute attrs[] __counted_by(notes);
};
static ssize_t module_notes_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t count)
{
/*
* The caller checked the pos and count against our size.
*/
memcpy(buf, bin_attr->private + pos, count);
return count;
}
static void free_notes_attrs(struct module_notes_attrs *notes_attrs,
unsigned int i)
{
@ -205,7 +194,7 @@ static void add_notes_attrs(struct module *mod, const struct load_info *info)
nattr->attr.mode = 0444;
nattr->size = info->sechdrs[i].sh_size;
nattr->private = (void *)info->sechdrs[i].sh_addr;
nattr->read = module_notes_read;
nattr->read = sysfs_bin_attr_simple_read;
++nattr;
}
++loaded;