#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 /* HASH_H */ amp;id=535b2f73f6f60fb227b700136c134c5d7c8f8ad3'>commitdiff
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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 14:25:21 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 14:25:21 -0800
commit535b2f73f6f60fb227b700136c134c5d7c8f8ad3 (patch)
tree04992e2f75ff02b4fa6ec5458f62c8e0958b29ad /Documentation
parentef486c599a1f20c465ea196cd2019474708fbe52 (diff)
parentb6a50cddbcbda7105355898ead18f1a647c22520 (diff)
Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 CPU updates from Ingo Molnar: "The changes in this development cycle were: - AMD CPU topology enhancements that are cleanups on current CPUs but which enable future Fam17 hardware. (Yazen Ghannam) - unify bugs.c and bugs_64.c (Borislav Petkov) - remove the show_msr= boot option (Borislav Petkov) - simplify a boot message (Borislav Petkov)" * 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/cpu/AMD: Clean up cpu_llc_id assignment per topology feature x86/cpu: Get rid of the show_msr= boot option x86/cpu: Merge bugs.c and bugs_64.c x86/cpu: Remove the printk format specifier in "CPU0: "
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt6
1 files changed, 0 insertions, 6 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt