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author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2015-07-25 12:52:36 (GMT) |
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committer | Simon Glass <sjg@chromium.org> | 2015-08-06 13:44:29 (GMT) |
commit | 2b07f6859ad17b74ce490f371f4878add6ae5a11 (patch) | |
tree | 506866b0d88d2ff24d87cecf26e8eb3da844e811 /drivers/core | |
parent | 608f26c51bebc68db7f2edc7590ee513d2bc5465 (diff) | |
download | u-boot-2b07f6859ad17b74ce490f371f4878add6ae5a11.tar.xz |
devres: add devm_kmalloc() and friends (managed memory allocators)
devm_kmalloc() is identical to kmalloc() except that the memory
allocated with it is managed and will be automatically released
when the device is removed/unbound.
Likewise for the other variants.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/core')
-rw-r--r-- | drivers/core/devres.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/core/devres.c b/drivers/core/devres.c index 49c270c..f235c1b 100644 --- a/drivers/core/devres.c +++ b/drivers/core/devres.c @@ -194,3 +194,37 @@ void devres_release_all(struct udevice *dev) { release_nodes(dev, &dev->devres_head, false); } + +/* + * Managed kmalloc/kfree + */ +static void devm_kmalloc_release(struct udevice *dev, void *res) +{ + /* noop */ +} + +static int devm_kmalloc_match(struct udevice *dev, void *res, void *data) +{ + return res == data; +} + +void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp) +{ + void *data; + + data = _devres_alloc(devm_kmalloc_release, size, gfp); + if (unlikely(!data)) + return NULL; + + devres_add(dev, data); + + return data; +} + +void devm_kfree(struct udevice *dev, void *p) +{ + int rc; + + rc = devres_destroy(dev, devm_kmalloc_release, devm_kmalloc_match, p); + WARN_ON(rc); +} |