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devres: add devm_alloc_percpu()

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Introduce managed counterparts for alloc_percpu() and free_percpu().
Add devm_alloc_percpu() and devm_free_percpu() into the managed
interfaces list.

Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Madalin Bucur
2016-11-15 10:41:01 +02:00
committed by David S. Miller
parent 319b0534b9
commit ff86aae3b4
3 changed files with 89 additions and 0 deletions
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19
include/linux/device.h
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@@ -698,6 +698,25 @@ static inline int devm_add_action_or_reset(struct device *dev,
return ret;
}
/**
* devm_alloc_percpu - Resource-managed alloc_percpu
* @dev: Device to allocate per-cpu memory for
* @type: Type to allocate per-cpu memory for
*
* Managed alloc_percpu. Per-cpu memory allocated with this function is
* automatically freed on driver detach.
*
* RETURNS:
* Pointer to allocated memory on success, NULL on failure.
*/
#define devm_alloc_percpu(dev, type) \
((typeof(type) __percpu *)__devm_alloc_percpu((dev), sizeof(type), \
__alignof__(type)))
void __percpu *__devm_alloc_percpu(struct device *dev, size_t size,
size_t align);
void devm_free_percpu(struct device *dev, void __percpu *pdata);
struct device_dma_parameters {
/*
* a low level driver may set these to teach IOMMU code about