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perf: Use device_show_string() helper for sysfs attributes

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Deduplicate sysfs ->show() callbacks which expose a string at a static
memory location.  Use the newly introduced device_show_string() helper
in the driver core instead by declaring those sysfs attributes with
DEVICE_STRING_ATTR_RO().

No functional change intended.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://lore.kernel.org/r/3a297850312b4ecb62d6872121de04496900f502.1713608122.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lukas Wunner
2024-04-20 22:00:04 +02:00
committed by Greg Kroah-Hartman
parent 7b53e926bf
commit b91b73a438
14 changed files with 15 additions and 139 deletions
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11
drivers/perf/qcom_l3_pmu.c
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@@ -609,18 +609,9 @@ static void qcom_l3_cache__event_read(struct perf_event *event)
/* formats */
static ssize_t l3cache_pmu_format_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dev_ext_attribute *eattr;
eattr = container_of(attr, struct dev_ext_attribute, attr);
return sysfs_emit(buf, "%s\n", (char *) eattr->var);
}
#define L3CACHE_PMU_FORMAT_ATTR(_name, _config) \
(&((struct dev_ext_attribute[]) { \
{ .attr = __ATTR(_name, 0444, l3cache_pmu_format_show, NULL), \
{ .attr = __ATTR(_name, 0444, device_show_string, NULL), \
.var = (void *) _config, } \
})[0].attr.attr)