[PATCH 11/12] cacheinfo: Allow for >32-bit cache 'id'

Rob Herring
2021-10-06T16:44:10Z

In preparation to set the cache 'id' based on the CPU h/w ids, allow for
64-bit bit 'id' value. The only case that needs this is arm64, so
unsigned long is sufficient.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/base/cacheinfo.c | 8 +++++++-
include/linux/cacheinfo.h | 2 +-
2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index dad296229161..66d10bdb863b 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -366,13 +366,19 @@ static ssize_t file_name##_show(struct device *dev, \
return sysfs_emit(buf, "%u\n", this_leaf->object); \
}

-show_one(id, id);
show_one(level, level);
show_one(coherency_line_size, coherency_line_size);
show_one(number_of_sets, number_of_sets);
show_one(physical_line_partition, physical_line_partition);
show_one(ways_of_associativity, ways_of_associativity);

+static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct cacheinfo *this_leaf = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%lu\n", this_leaf->id);
+}
+
static ssize_t size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h
index 2f909ed084c6..b2e7f3e40204 100644
--- a/include/linux/cacheinfo.h
+++ b/include/linux/cacheinfo.h
@@ -48,7 +48,7 @@ extern unsigned int coherency_max_size;
* keeping, the remaining members form the core properties of the cache
*/
struct cacheinfo {
- unsigned int id;
+ unsigned long id;
enum cache_type type;
unsigned int level;
unsigned int coherency_line_size;
--
2.30.2