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sysfs: add parameter "struct bin_attribute *" in .read/.write methods for sysfs binary attributes

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Well, first of all, I don't want to change so many files either.

What I do:
Adding a new parameter "struct bin_attribute *" in the
.read/.write methods for the sysfs binary attributes.

In fact, only the four lines change in fs/sysfs/bin.c and
include/linux/sysfs.h do the real work.
But I have to update all the files that use binary attributes
to make them compatible with the new .read and .write methods.
I'm not sure if I missed any. :(

Why I do this:
For a sysfs attribute, we can get a pointer pointing to the
struct attribute in the .show/.store method,
while we can't do this for the binary attributes.
I don't know why this is different, but this does make it not
so handy to use the binary attributes as the regular ones.
So I think this patch is reasonable. :)

Who benefits from it:
The patch that exposes ACPI tables in sysfs
requires such an improvement.
All the table binary attributes share the same .read method.
Parameter "struct bin_attribute *" is used to get
the table signature and instance number which are used to
distinguish different ACPI table binary attributes.

Without this parameter, we need to offer different .read methods
for different ACPI table binary attributes.
This is impossible as there are various ACPI tables on different
platforms, and we don't know what they are until they are loaded.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Zhang Rui
2007-06-09 13:57:22 +08:00
committed by Greg Kroah-Hartman
parent 51225039f3
commit 91a6902958
27 changed files with 185 additions and 106 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/pci/pci-sysfs.c
View File

@@ -213,7 +213,8 @@ struct device_attribute pci_dev_attrs[] = {
};
static ssize_t
pci_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
unsigned int size = 64;
@@ -285,7 +286,8 @@ pci_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
}
static ssize_t
pci_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj));
unsigned int size = count;
@@ -352,7 +354,8 @@ pci_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
* callback routine (pci_legacy_read).
*/
ssize_t
pci_read_legacy_io(struct kobject *kobj, char *buf, loff_t off, size_t count)
pci_read_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct pci_bus *bus = to_pci_bus(container_of(kobj,
struct class_device,
@@ -376,7 +379,8 @@ pci_read_legacy_io(struct kobject *kobj, char *buf, loff_t off, size_t count)
* callback routine (pci_legacy_write).
*/
ssize_t
pci_write_legacy_io(struct kobject *kobj, char *buf, loff_t off, size_t count)
pci_write_legacy_io(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct pci_bus *bus = to_pci_bus(container_of(kobj,
struct class_device,
@@ -528,7 +532,8 @@ static inline void pci_remove_resource_files(struct pci_dev *dev) { return; }
* writing anything except 0 enables it
*/
static ssize_t
pci_write_rom(struct kobject *kobj, char *buf, loff_t off, size_t count)
pci_write_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
@@ -551,7 +556,8 @@ pci_write_rom(struct kobject *kobj, char *buf, loff_t off, size_t count)
* device corresponding to @kobj.
*/
static ssize_t
pci_read_rom(struct kobject *kobj, char *buf, loff_t off, size_t count)
pci_read_rom(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct pci_dev *pdev = to_pci_dev(container_of(kobj, struct device, kobj));
void __iomem *rom;