/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Subject to the GPL, version 2. */ #ifndef HASH_H #define HASH_H /* Hash table implementation from the GIT project. */ /* Copyright 2008 (C) Linus Torvalds, GPL version 2 */ /* * These are some simple generic hash table helper functions. * Not necessarily suitable for all users, but good for things * where you want to just keep track of a list of things, and * have a good hash to use on them. * * It keeps the hash table at roughly 50-75% free, so the memory * cost of the hash table itself is roughly * * 3 * 2*sizeof(void *) * nr_of_objects * * bytes. * * FIXME: on 64-bit architectures, we waste memory. It would be * good to have just 32-bit pointers, requiring a special allocator * for hashed entries or something. */ #include #define alloc_nr(x) (((x) + 16) * 3 / 2) #define INSERT_HASH_PROTOS(ops, table) \ do { \ void **pos = insert_hash((ops).key, &(ops), &(table)); \ /* We already had an entry there? */ \ if (pos) { \ (ops).next = *pos; \ *pos = &(ops); \ } \ } while (0) struct hash_table_entry { unsigned int hash; void *ptr; }; struct hash_table { unsigned int size, nr; struct hash_table_entry *array; }; extern void *lookup_hash(unsigned int hash, const struct hash_table *table); extern void **insert_hash(unsigned int hash, void *ptr, struct hash_table *table); extern void *remove_hash(unsigned int hash, void *ptr, void *ptr_next, struct hash_table *table); extern int for_each_hash(const struct hash_table *table, int (*fn)(void *)); extern int for_each_hash_int(const struct hash_table *table, int (*fn)(void *, int), int arg); extern void free_hash(struct hash_table *table); static inline void init_hash(struct hash_table *table) { table->size = 0; table->nr = 0; table->array = NULL; } static inline unsigned char icase_hash(unsigned char c) { return c & ~((c & 0x40) >> 1); } static inline unsigned int hash_name(const char *name, int namelen) { unsigned int hash = 0x123; do { unsigned char c = *name++; c = icase_hash(c); hash = hash * 101 + c; } while (--namelen); return hash; } #endif log msg
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2016-04-16 22:15:46 +0200
committerBjorn Helgaas <bhelgaas@google.com>2016-05-02 11:59:48 -0500
commit76ba8c1f2312e5128ef33e00a29c72c85bb80068 (patch)
tree227f98d0324b011bc3ea7783ae8f07e588e90859
parent9735a22799b9214d17d3c231fe377fc852f042e9 (diff)
PCI: rcar: Select PCI_MSI_IRQ_DOMAIN
The R-Car PCIe driver requires the use of IRQ domains for its MSI code: drivers/pci/host/pcie-rcar.c:635:9: error: implicit declaration of function 'irq_find_mapping' [-Werror=implicit-function-declaration] drivers/pci/host/pcie-rcar.c:666:8: error: implicit declaration of function 'irq_create_mapping' [-Werror=implicit-function-declaration] ... Add a Kconfig select to ensure that the feature is always enabled. This is not consistent with what the other drivers do at the moment, but I have another patch that changes them to do it like this one, which is more logical. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat