diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.9/303-add-devm_alloc_percpu-support.patch')
-rw-r--r-- | target/linux/layerscape/patches-4.9/303-add-devm_alloc_percpu-support.patch | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-4.9/303-add-devm_alloc_percpu-support.patch b/target/linux/layerscape/patches-4.9/303-add-devm_alloc_percpu-support.patch new file mode 100644 index 0000000..a8573cc --- /dev/null +++ b/target/linux/layerscape/patches-4.9/303-add-devm_alloc_percpu-support.patch @@ -0,0 +1,125 @@ +From d33bde3c487c722541ad359e1d22090a78df0c77 Mon Sep 17 00:00:00 2001 +From: Zhao Qiang <qiang.zhao@nxp.com> +Date: Tue, 11 Jul 2017 16:47:18 +0800 +Subject: [PATCH] add devm_alloc_percpu support + +Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com> +--- + drivers/base/devres.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++ + include/linux/device.h | 19 +++++++++++++++ + 2 files changed, 85 insertions(+) + +diff --git a/drivers/base/devres.c b/drivers/base/devres.c +index 8fc654f0807b..71d577025285 100644 +--- a/drivers/base/devres.c ++++ b/drivers/base/devres.c +@@ -10,6 +10,7 @@ + #include <linux/device.h> + #include <linux/module.h> + #include <linux/slab.h> ++#include <linux/percpu.h> + + #include "base.h" + +@@ -985,3 +986,68 @@ void devm_free_pages(struct device *dev, unsigned long addr) + &devres)); + } + EXPORT_SYMBOL_GPL(devm_free_pages); ++ ++static void devm_percpu_release(struct device *dev, void *pdata) ++{ ++ void __percpu *p; ++ ++ p = *(void __percpu **)pdata; ++ free_percpu(p); ++} ++ ++static int devm_percpu_match(struct device *dev, void *data, void *p) ++{ ++ struct devres *devr = container_of(data, struct devres, data); ++ ++ return *(void **)devr->data == p; ++} ++ ++/** ++ * __devm_alloc_percpu - Resource-managed alloc_percpu ++ * @dev: Device to allocate per-cpu memory for ++ * @size: Size of per-cpu memory to allocate ++ * @align: Alignment of per-cpu memory to allocate ++ * ++ * 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. ++ */ ++void __percpu *__devm_alloc_percpu(struct device *dev, size_t size, ++ size_t align) ++{ ++ void *p; ++ void __percpu *pcpu; ++ ++ pcpu = __alloc_percpu(size, align); ++ if (!pcpu) ++ return NULL; ++ ++ p = devres_alloc(devm_percpu_release, sizeof(void *), GFP_KERNEL); ++ if (!p) { ++ free_percpu(pcpu); ++ return NULL; ++ } ++ ++ *(void __percpu **)p = pcpu; ++ ++ devres_add(dev, p); ++ ++ return pcpu; ++} ++EXPORT_SYMBOL_GPL(__devm_alloc_percpu); ++ ++/** ++ * devm_free_percpu - Resource-managed free_percpu ++ * @dev: Device this memory belongs to ++ * @pdata: Per-cpu memory to free ++ * ++ * Free memory allocated with devm_alloc_percpu(). ++ */ ++void devm_free_percpu(struct device *dev, void __percpu *pdata) ++{ ++ WARN_ON(devres_destroy(dev, devm_percpu_release, devm_percpu_match, ++ (void *)pdata)); ++} ++EXPORT_SYMBOL_GPL(devm_free_percpu); +diff --git a/include/linux/device.h b/include/linux/device.h +index bc41e87a969b..0a2135cbddc9 100644 +--- a/include/linux/device.h ++++ b/include/linux/device.h +@@ -686,6 +686,25 @@ void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res); + int devm_add_action(struct device *dev, void (*action)(void *), void *data); + void devm_remove_action(struct device *dev, void (*action)(void *), void *data); + ++/** ++ * 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); ++ + static inline int devm_add_action_or_reset(struct device *dev, + void (*action)(void *), void *data) + { +-- +2.11.1 + |