diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-11-23 21:17:51 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-11-24 08:54:02 +0000 |
| commit | b7d3aabf900728b6b13b860157026fd26099208a (patch) | |
| tree | 70faa955d1864e572fe26d03ed1d79c4ca2f52f4 | |
| parent | 8911a31c813275882fdc15554235a914e678759e (diff) | |
drm/i915/pmu: Hide the (unsigned long)ptr cast
We pretend the PMU config id is a pointer value when encoding it into
the device parameters for presentation via sysfs. This requires casting
of an unsigned long into and out of the pointer member, which annoys
smatch:
drivers/gpu/drm/i915/i915_pmu.c:684 i915_pmu_event_show() warn: argument 3 to %lx specifier is cast from pointer
Instead of abusing a generic dev_ext_attribute, define our own typesafe
attributes.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171123211751.2885-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_pmu.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c index 6a42e7f7967d..5170a46893d7 100644 --- a/drivers/gpu/drm/i915/i915_pmu.c +++ b/drivers/gpu/drm/i915/i915_pmu.c @@ -650,19 +650,24 @@ static int i915_pmu_event_event_idx(struct perf_event *event) return 0; } +struct i915_str_attribute { + struct device_attribute attr; + const char *str; +}; + static ssize_t i915_pmu_format_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct dev_ext_attribute *eattr; + struct i915_str_attribute *eattr; - eattr = container_of(attr, struct dev_ext_attribute, attr); - return sprintf(buf, "%s\n", (char *)eattr->var); + eattr = container_of(attr, struct i915_str_attribute, attr); + return sprintf(buf, "%s\n", eattr->str); } #define I915_PMU_FORMAT_ATTR(_name, _config) \ - (&((struct dev_ext_attribute[]) { \ + (&((struct i915_str_attribute[]) { \ { .attr = __ATTR(_name, 0444, i915_pmu_format_show, NULL), \ - .var = (void *)_config, } \ + .str = _config, } \ })[0].attr.attr) static struct attribute *i915_pmu_format_attrs[] = { @@ -675,19 +680,24 @@ static const struct attribute_group i915_pmu_format_attr_group = { .attrs = i915_pmu_format_attrs, }; +struct i915_ext_attribute { + struct device_attribute attr; + unsigned long val; +}; + static ssize_t i915_pmu_event_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct dev_ext_attribute *eattr; + struct i915_ext_attribute *eattr; - eattr = container_of(attr, struct dev_ext_attribute, attr); - return sprintf(buf, "config=0x%lx\n", (unsigned long)eattr->var); + eattr = container_of(attr, struct i915_ext_attribute, attr); + return sprintf(buf, "config=0x%lx\n", eattr->val); } #define I915_EVENT_ATTR(_name, _config) \ - (&((struct dev_ext_attribute[]) { \ + (&((struct i915_ext_attribute[]) { \ { .attr = __ATTR(_name, 0444, i915_pmu_event_show, NULL), \ - .var = (void *)_config, } \ + .val = _config, } \ })[0].attr.attr) #define I915_EVENT_STR(_name, _str) \ |