diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/md/dm-cache-policy-internal.h | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/md/dm-cache-policy-internal.h')
-rw-r--r-- | kernel/drivers/md/dm-cache-policy-internal.h | 47 |
1 files changed, 39 insertions, 8 deletions
diff --git a/kernel/drivers/md/dm-cache-policy-internal.h b/kernel/drivers/md/dm-cache-policy-internal.h index c198e6def..2816018fa 100644 --- a/kernel/drivers/md/dm-cache-policy-internal.h +++ b/kernel/drivers/md/dm-cache-policy-internal.h @@ -7,6 +7,7 @@ #ifndef DM_CACHE_POLICY_INTERNAL_H #define DM_CACHE_POLICY_INTERNAL_H +#include <linux/vmalloc.h> #include "dm-cache-policy.h" /*----------------------------------------------------------------*/ @@ -55,9 +56,10 @@ static inline int policy_walk_mappings(struct dm_cache_policy *p, static inline int policy_writeback_work(struct dm_cache_policy *p, dm_oblock_t *oblock, - dm_cblock_t *cblock) + dm_cblock_t *cblock, + bool critical_only) { - return p->writeback_work ? p->writeback_work(p, oblock, cblock) : -ENOENT; + return p->writeback_work ? p->writeback_work(p, oblock, cblock, critical_only) : -ENOENT; } static inline void policy_remove_mapping(struct dm_cache_policy *p, dm_oblock_t oblock) @@ -81,19 +83,21 @@ static inline dm_cblock_t policy_residency(struct dm_cache_policy *p) return p->residency(p); } -static inline void policy_tick(struct dm_cache_policy *p) +static inline void policy_tick(struct dm_cache_policy *p, bool can_block) { if (p->tick) - return p->tick(p); + return p->tick(p, can_block); } -static inline int policy_emit_config_values(struct dm_cache_policy *p, char *result, unsigned maxlen) +static inline int policy_emit_config_values(struct dm_cache_policy *p, char *result, + unsigned maxlen, ssize_t *sz_ptr) { - ssize_t sz = 0; + ssize_t sz = *sz_ptr; if (p->emit_config_values) - return p->emit_config_values(p, result, maxlen); + return p->emit_config_values(p, result, maxlen, sz_ptr); - DMEMIT("0"); + DMEMIT("0 "); + *sz_ptr = sz; return 0; } @@ -106,6 +110,33 @@ static inline int policy_set_config_value(struct dm_cache_policy *p, /*----------------------------------------------------------------*/ /* + * Some utility functions commonly used by policies and the core target. + */ +static inline size_t bitset_size_in_bytes(unsigned nr_entries) +{ + return sizeof(unsigned long) * dm_div_up(nr_entries, BITS_PER_LONG); +} + +static inline unsigned long *alloc_bitset(unsigned nr_entries) +{ + size_t s = bitset_size_in_bytes(nr_entries); + return vzalloc(s); +} + +static inline void clear_bitset(void *bitset, unsigned nr_entries) +{ + size_t s = bitset_size_in_bytes(nr_entries); + memset(bitset, 0, s); +} + +static inline void free_bitset(unsigned long *bits) +{ + vfree(bits); +} + +/*----------------------------------------------------------------*/ + +/* * Creates a new cache policy given a policy name, a cache size, an origin size and the block size. */ struct dm_cache_policy *dm_cache_policy_create(const char *name, dm_cblock_t cache_size, |