phylib: introduce mdiobus_alloc_size()
Introduce function mdiobus_alloc_size() as an alternative to mdiobus_alloc(). Most callers of mdiobus_alloc() also allocate a private data structure, and then manually point bus->priv to this object. mdiobus_alloc_size() combines the two operations into one, which simplifies memory management. The original mdiobus_alloc() now just calls mdiobus_alloc_size(0). Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -37,22 +37,36 @@
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#include <asm/uaccess.h>
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/**
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* mdiobus_alloc - allocate a mii_bus structure
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* mdiobus_alloc_size - allocate a mii_bus structure
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*
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* Description: called by a bus driver to allocate an mii_bus
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* structure to fill in.
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*
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* 'size' is an an extra amount of memory to allocate for private storage.
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* If non-zero, then bus->priv is points to that memory.
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*/
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struct mii_bus *mdiobus_alloc(void)
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struct mii_bus *mdiobus_alloc_size(size_t size)
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{
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struct mii_bus *bus;
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size_t aligned_size = ALIGN(sizeof(*bus), NETDEV_ALIGN);
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size_t alloc_size;
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bus = kzalloc(sizeof(*bus), GFP_KERNEL);
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if (bus != NULL)
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/* If we alloc extra space, it should be aligned */
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if (size)
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alloc_size = aligned_size + size;
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else
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alloc_size = sizeof(*bus);
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bus = kzalloc(alloc_size, GFP_KERNEL);
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if (bus) {
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bus->state = MDIOBUS_ALLOCATED;
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if (size)
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bus->priv = (void *)bus + aligned_size;
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}
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return bus;
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}
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EXPORT_SYMBOL(mdiobus_alloc);
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EXPORT_SYMBOL(mdiobus_alloc_size);
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/**
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* mdiobus_release - mii_bus device release callback
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@ -129,7 +129,12 @@ struct mii_bus {
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};
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#define to_mii_bus(d) container_of(d, struct mii_bus, dev)
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struct mii_bus *mdiobus_alloc(void);
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struct mii_bus *mdiobus_alloc_size(size_t);
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static inline struct mii_bus *mdiobus_alloc(void)
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{
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return mdiobus_alloc_size(0);
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}
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int mdiobus_register(struct mii_bus *bus);
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void mdiobus_unregister(struct mii_bus *bus);
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void mdiobus_free(struct mii_bus *bus);
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