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| author |   Borislav Petkov <bp@alien8.de> | 2012-10-09 19:52:05 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@alien8.de> | 2012-10-26 14:37:55 +0200 |
| commit | 91872392f08486f692887d2f06a333f512648f22 (patch) | |
| tree | 24f82690f04c3282c36bc81d60763687badf33c6 | |
| parent | Linux 3.7-rc2 (diff) | |
| download | linux-dev-91872392f08486f692887d2f06a333f512648f22.tar.xz linux-dev-91872392f08486f692887d2f06a333f512648f22.zip | |
drivers/base: Add a DEVICE_BOOL_ATTR macro
... which, analogous to DEVICE_INT_ATTR provides functionality to
set/clear bools. Its purpose is to be used where values need to be used
as booleans in configuration context.
Next patch uses this.
Signed-off-by: Borislav Petkov <bp@alien8.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Tony Luck <tony.luck@intel.com>
| -rw-r--r-- | drivers/base/core.c | 21 | ||||
| -rw-r--r-- | include/linux/device.h | 7 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index abea76c36a4b..c8ae1f6b01b9 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -171,6 +171,27 @@ ssize_t device_show_int(struct device *dev, } EXPORT_SYMBOL_GPL(device_show_int); +ssize_t device_store_bool(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + struct dev_ext_attribute *ea = to_ext_attr(attr); + + if (strtobool(buf, ea->var) < 0) + return -EINVAL; + + return size; +} +EXPORT_SYMBOL_GPL(device_store_bool); + +ssize_t device_show_bool(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct dev_ext_attribute *ea = to_ext_attr(attr); + + return snprintf(buf, PAGE_SIZE, "%d\n", *(bool *)(ea->var)); +} +EXPORT_SYMBOL_GPL(device_show_bool); + /** * device_release - free device structure. * @kobj: device's kobject. diff --git a/include/linux/device.h b/include/linux/device.h index 86ef6ab553b1..50c85a26b003 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -496,6 +496,10 @@ ssize_t device_show_int(struct device *dev, struct device_attribute *attr, char *buf); ssize_t device_store_int(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); +ssize_t device_show_bool(struct device *dev, struct device_attribute *attr, + char *buf); +ssize_t device_store_bool(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count); #define DEVICE_ATTR(_name, _mode, _show, _store) \ struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) @@ -505,6 +509,9 @@ ssize_t device_store_int(struct device *dev, struct device_attribute *attr, #define DEVICE_INT_ATTR(_name, _mode, _var) \ struct dev_ext_attribute dev_attr_##_name = \ { __ATTR(_name, _mode, device_show_int, device_store_int), &(_var) } +#define DEVICE_BOOL_ATTR(_name, _mode, _var) \ + struct dev_ext_attribute dev_attr_##_name = \ + { __ATTR(_name, _mode, device_show_bool, device_store_bool), &(_var) } #define DEVICE_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \ struct device_attribute dev_attr_##_name = \ __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) |