From 0c385190392d8c7128fb7517b3c676e19c7b8808 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 18 Aug 2019 11:05:54 +0200 Subject: resource: add a not device managed request_free_mem_region variant Factor out the guts of devm_request_free_mem_region so that we can implement both a device managed and a manually release version as tiny wrappers around it. Link: https://lore.kernel.org/r/20190818090557.17853-2-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Ira Weiny Reviewed-by: Dan Williams Tested-by: Bharata B Rao Reviewed-by: Jason Gunthorpe Signed-off-by: Jason Gunthorpe --- kernel/resource.c | 45 +++++++++++++++++++++++++++++++-------------- 1 file changed, 31 insertions(+), 14 deletions(-) (limited to 'kernel/resource.c') diff --git a/kernel/resource.c b/kernel/resource.c index 7ea4306503c5..74877e9d90ca 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -1644,19 +1644,8 @@ void resource_list_free(struct list_head *head) EXPORT_SYMBOL(resource_list_free); #ifdef CONFIG_DEVICE_PRIVATE -/** - * devm_request_free_mem_region - find free region for device private memory - * - * @dev: device struct to bind the resource to - * @size: size in bytes of the device memory to add - * @base: resource tree to look in - * - * This function tries to find an empty range of physical address big enough to - * contain the new resource, so that it can later be hotplugged as ZONE_DEVICE - * memory, which in turn allocates struct pages. - */ -struct resource *devm_request_free_mem_region(struct device *dev, - struct resource *base, unsigned long size) +static struct resource *__request_free_mem_region(struct device *dev, + struct resource *base, unsigned long size, const char *name) { resource_size_t end, addr; struct resource *res; @@ -1670,7 +1659,10 @@ struct resource *devm_request_free_mem_region(struct device *dev, REGION_DISJOINT) continue; - res = devm_request_mem_region(dev, addr, size, dev_name(dev)); + if (dev) + res = devm_request_mem_region(dev, addr, size, name); + else + res = request_mem_region(addr, size, name); if (!res) return ERR_PTR(-ENOMEM); res->desc = IORES_DESC_DEVICE_PRIVATE_MEMORY; @@ -1679,7 +1671,32 @@ struct resource *devm_request_free_mem_region(struct device *dev, return ERR_PTR(-ERANGE); } + +/** + * devm_request_free_mem_region - find free region for device private memory + * + * @dev: device struct to bind the resource to + * @size: size in bytes of the device memory to add + * @base: resource tree to look in + * + * This function tries to find an empty range of physical address big enough to + * contain the new resource, so that it can later be hotplugged as ZONE_DEVICE + * memory, which in turn allocates struct pages. + */ +struct resource *devm_request_free_mem_region(struct device *dev, + struct resource *base, unsigned long size) +{ + return __request_free_mem_region(dev, base, size, dev_name(dev)); +} EXPORT_SYMBOL_GPL(devm_request_free_mem_region); + +struct resource *request_free_mem_region(struct resource *base, + unsigned long size, const char *name) +{ + return __request_free_mem_region(NULL, base, size, name); +} +EXPORT_SYMBOL_GPL(request_free_mem_region); + #endif /* CONFIG_DEVICE_PRIVATE */ static int __init strict_iomem(char *str) -- cgit