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authorZhang Rui <rui.zhang@intel.com>2007-06-09 13:57:22 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-11 16:09:09 -0700
commit91a6902958f052358899f58683d44e36228d85c2 (patch)
treea713792cf3bb09bdbd2ac6906aa44b3da3e49250 /drivers/w1/slaves
parent51225039f3cf9d250596d1344494b293274b9169 (diff)
downloadop-kernel-dev-91a6902958f052358899f58683d44e36228d85c2.zip
op-kernel-dev-91a6902958f052358899f58683d44e36228d85c2.tar.gz
sysfs: add parameter "struct bin_attribute *" in .read/.write methods for sysfs binary attributes
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>
Diffstat (limited to 'drivers/w1/slaves')
-rw-r--r--drivers/w1/slaves/w1_ds2433.c10
-rw-r--r--drivers/w1/slaves/w1_therm.c7
2 files changed, 11 insertions, 6 deletions
diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
index 4e13aa7..cab5600 100644
--- a/drivers/w1/slaves/w1_ds2433.c
+++ b/drivers/w1/slaves/w1_ds2433.c
@@ -91,8 +91,9 @@ static int w1_f23_refresh_block(struct w1_slave *sl, struct w1_f23_data *data,
}
#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
-static ssize_t w1_f23_read_bin(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+static ssize_t w1_f23_read_bin(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
#ifdef CONFIG_W1_SLAVE_DS2433_CRC
@@ -199,8 +200,9 @@ static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
return 0;
}
-static ssize_t w1_f23_write_bin(struct kobject *kobj, char *buf, loff_t off,
- size_t count)
+static ssize_t w1_f23_write_bin(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
int addr, len, idx;
diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c
index 8ba4e57..4318935 100644
--- a/drivers/w1/slaves/w1_therm.c
+++ b/drivers/w1/slaves/w1_therm.c
@@ -42,7 +42,8 @@ static u8 bad_roms[][9] = {
{}
};
-static ssize_t w1_therm_read_bin(struct kobject *, char *, loff_t, size_t);
+static ssize_t w1_therm_read_bin(struct kobject *, struct bin_attribute *,
+ char *, loff_t, size_t);
static struct bin_attribute w1_therm_bin_attr = {
.attr = {
@@ -158,7 +159,9 @@ static int w1_therm_check_rom(u8 rom[9])
return 0;
}
-static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
+static ssize_t w1_therm_read_bin(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = kobj_to_w1_slave(kobj);
struct w1_master *dev = sl->master;
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