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dm persistent data: set some btree fn parms const

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Mark some constant parameters constant in some dm-btree functions.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mike Snitzer 2013-03-01 22:45:47 +00:00 committed by Alasdair G Kergon
parent e4c938111f
commit 018cede93c
2 changed files with 9 additions and 9 deletions
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12
drivers/md/dm-thin-metadata.c
View File

@ -280,7 +280,7 @@ static void unpack_block_time(uint64_t v, dm_block_t *b, uint32_t *t)
*t = v & ((1 << 24) - 1);
}
static void data_block_inc(void *context, void *value_le)
static void data_block_inc(void *context, const void *value_le)
{
struct dm_space_map *sm = context;
__le64 v_le;
@ -292,7 +292,7 @@ static void data_block_inc(void *context, void *value_le)
dm_sm_inc_block(sm, b);
}
static void data_block_dec(void *context, void *value_le)
static void data_block_dec(void *context, const void *value_le)
{
struct dm_space_map *sm = context;
__le64 v_le;
@ -304,7 +304,7 @@ static void data_block_dec(void *context, void *value_le)
dm_sm_dec_block(sm, b);
}
static int data_block_equal(void *context, void *value1_le, void *value2_le)
static int data_block_equal(void *context, const void *value1_le, const void *value2_le)
{
__le64 v1_le, v2_le;
uint64_t b1, b2;
@ -318,7 +318,7 @@ static int data_block_equal(void *context, void *value1_le, void *value2_le)
return b1 == b2;
}
static void subtree_inc(void *context, void *value)
static void subtree_inc(void *context, const void *value)
{
struct dm_btree_info *info = context;
__le64 root_le;
@ -329,7 +329,7 @@ static void subtree_inc(void *context, void *value)
dm_tm_inc(info->tm, root);
}
static void subtree_dec(void *context, void *value)
static void subtree_dec(void *context, const void *value)
{
struct dm_btree_info *info = context;
__le64 root_le;
@ -341,7 +341,7 @@ static void subtree_dec(void *context, void *value)
DMERR("btree delete failed\n");
}
static int subtree_equal(void *context, void *value1_le, void *value2_le)
static int subtree_equal(void *context, const void *value1_le, const void *value2_le)
{
__le64 v1_le, v2_le;
memcpy(&v1_le, value1_le, sizeof(v1_le));

6
drivers/md/persistent-data/dm-btree.h
View File

@ -58,21 +58,21 @@ struct dm_btree_value_type {
* somewhere.) This method is _not_ called for insertion of a new
* value: It is assumed the ref count is already 1.
*/
void (*inc)(void *context, void *value);
void (*inc)(void *context, const void *value);
/*
* This value is being deleted. The btree takes care of freeing
* the memory pointed to by @value. Often the del function just
* needs to decrement a reference count somewhere.
*/
void (*dec)(void *context, void *value);
void (*dec)(void *context, const void *value);
/*
* A test for equality between two values. When a value is
* overwritten with a new one, the old one has the dec method
* called _unless_ the new and old value are deemed equal.
*/
int (*equal)(void *context, void *value1, void *value2);
int (*equal)(void *context, const void *value1, const void *value2);
};
/*