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staging: vchiq_core: Remove stackhog in process_free_queue

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This removes the stackhog in process_free_queue by allocating the
necessary memory within the recycle thread main function instead
of the stack.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stefan Wahren 2018-03-31 22:09:38 +02:00 committed by Greg Kroah-Hartman
parent 8113b89fc6
commit 6dca544eba
1 changed files with 12 additions and 4 deletions
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16
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
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@ -620,10 +620,9 @@ reserve_space(VCHIQ_STATE_T *state, size_t space, int is_blocking)
/* Called by the recycle thread. */
static void
process_free_queue(VCHIQ_STATE_T *state)
process_free_queue(VCHIQ_STATE_T *state, BITSET_T *service_found, size_t length)
{
VCHIQ_SHARED_STATE_T *local = state->local;
BITSET_T service_found[BITSET_SIZE(VCHIQ_MAX_SERVICES)];
int slot_queue_available;
/* Find slots which have been freed by the other side, and return them
@ -656,7 +655,7 @@ process_free_queue(VCHIQ_STATE_T *state)
/* Initialise the bitmask for services which have used this
** slot */
BITSET_ZERO(service_found);
memset(service_found, 0, length);
pos = 0;
@ -2183,11 +2182,20 @@ recycle_func(void *v)
{
VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v;
VCHIQ_SHARED_STATE_T *local = state->local;
BITSET_T *found;
size_t length;
length = sizeof(*found) * BITSET_SIZE(VCHIQ_MAX_SERVICES);
found = kmalloc_array(BITSET_SIZE(VCHIQ_MAX_SERVICES), sizeof(*found),
GFP_KERNEL);
if (!found)
return -ENOMEM;
while (1) {
remote_event_wait(state, &local->recycle);
process_free_queue(state);
process_free_queue(state, found, length);
}
return 0;
}