From: Jiri Pirko <jiri@xxxxxxxxxx>
With introduction of __free() macro using cleanup infrastructure, it
will very likely become quite common to see following pattern:
type *var __free(kfree) = kzalloc(sizeof(*var), GFP_KERNEL);
To follow the CLASS() flow from cleanup.h, introduce a simple macro
KZALLOC_FREE() to wrap this over and allow the same flow.
Show an example usage in gpio-sim driver.
Signed-off-by: Jiri Pirko <jiri@xxxxxxxxxx>
---
drivers/gpio/gpio-sim.c | 3 +--
include/linux/slab.h | 3 +++
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index c4106e37e6db..997237b3d80c 100644
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -1496,8 +1496,7 @@ gpio_sim_config_make_device_group(struct config_group *group, const char *name)
{
int id;
- struct gpio_sim_device *dev __free(kfree) = kzalloc(sizeof(*dev),
- GFP_KERNEL);
+ KZALLOC_FREE(struct gpio_sim_device *, dev, GFP_KERNEL);
if (!dev)
return ERR_PTR(-ENOMEM);
diff --git a/include/linux/slab.h b/include/linux/slab.h
index b5f5ee8308d0..baee6acd58d3 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -711,6 +711,9 @@ static inline __alloc_size(1) void *kzalloc(size_t size, gfp_t flags)
return kmalloc(size, flags | __GFP_ZERO);
}
+#define KZALLOC_FREE(_type, var, _gfp_t) \
+ _type var __free(kfree) = kzalloc(sizeof(*var), _gfp_t)
+
/**
* kzalloc_node - allocate zeroed memory from a particular memory node.
* @size: how many bytes of memory are required.
--
2.44.0
