#define _GNU_SOURCE #include #include #include #include #include "locking.h" #include "cpusched.h" #include "xmalloc.h" #include "hash.h" struct map_entry { int fd; unsigned int cpu; struct map_entry *next; }; static struct hash_table mapper; static unsigned int *cpu_work_map = NULL; static unsigned int cpu_len = 0; static struct rwlock map_lock; static unsigned int get_appropriate_cpu(void) { unsigned int i, cpu = 0; unsigned int work = UINT_MAX; for (i = 0; i < cpu_len; ++i) { if (cpu_work_map[i] < work) { work = cpu_work_map[i]; cpu = i; } } return cpu; } unsigned int socket_to_cpu(int fd) { int cpu = 0; struct map_entry *entry; rwlock_rd_lock(&map_lock); entry = lookup_hash(fd, &mapper); while (entry && fd != entry->fd) entry = entry->next; if (entry && fd == entry->fd) cpu = entry->cpu; rwlock_unlock(&map_lock); return cpu; } unsigned int register_socket(int fd) { void **pos; struct map_entry *entry; rwlock_wr_lock(&map_lock); entry = xzmalloc(sizeof(*entry)); entry->fd = fd; entry->cpu = get_appropriate_cpu(); cpu_work_map[entry->cpu]++; pos = insert_hash(entry->fd, entry, &mapper); if (pos) { entry->next = (*pos); (*pos) = entry; } rwlock_unlock(&map_lock); return entry->cpu; } static struct map_entry *socket_to_map_entry(int fd) { struct map_entry *entry, *ret = NULL; rwlock_rd_lock(&map_lock); entry = lookup_hash(fd, &mapper); while (entry && fd != entry->fd) entry = entry->next; if (entry && fd == entry->fd) ret = entry; rwlock_unlock(&map_lock); return ret; } void unregister_socket(int fd) { struct map_entry *pos; struct map_entry *entry = socket_to_map_entry(fd); if (entry == NULL) return; rwlock_wr_lock(&map_lock); cpu_work_map[entry->cpu]--; pos = remove_hash(entry->fd, entry, entry->next, &mapper); while (pos && pos->next && pos->next != entry) pos = pos->next; if (pos && pos->next && pos->next == entry) pos->next = entry->next; entry->next = NULL; xfree(entry); rwlock_unlock(&map_lock); } static int cleanup_cpusched_batch(void *ptr) { struct map_entry *next; struct map_entry *entry = ptr; if (!entry) return 0; while ((next = entry->next)) { entry->next = NULL; xfree(entry); entry = next; } xfree(entry); return 0; } void init_cpusched(unsigned int cpus) { rwlock_init(&map_lock); cpu_len = cpus; cpu_work_map = xcalloc(cpu_len, sizeof(*cpu_work_map)); init_hash(&mapper); } void destroy_cpusched(void) { xfree(cpu_work_map); for_each_hash(&mapper, cleanup_cpusched_batch); free_hash(&mapper); rwlock_destroy(&map_lock); } 1ea8357d260aa14bb6fb1a4834248d5'>root/.mailmap

diff options

author	Chris Packham <chris.packham@alliedtelesis.co.nz>	2016-10-05 10:40:54 +1300
committer	Guenter Roeck <linux@roeck-us.net>	2016-10-17 10:16:20 -0700
commit	667f4bab81ea8357d260aa14bb6fb1a4834248d5 (patch)
tree	a0cadcf223dbfcfe8a7b708d88cb957bbca7b3c7 /.mailmap
parent	1001354ca34179f3db924eb66672442a173147dc (diff)

hwmon: (adm9240) handle temperature readings below 0

Unlike the temperature thresholds the temperature data is a 9-bit signed value. This allows and additional 0.5 degrees of precision on the reading but makes handling negative values slightly harder. In order to have sign-extension applied correctly the 9-bit value is stored in the upper bits of a signed 16-bit value. When presenting this in sysfs the value is shifted and scaled appropriately. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Diffstat (limited to '.mailmap')


context:
space:
mode: