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infra: memory debugging must disable irqs during spinlocks

This commit is contained in:
Thomas Schoebel-Theuer 2017-05-16 09:59:02 +02:00
parent 37f738bb5c
commit bb2f82503c
1 changed files with 8 additions and 6 deletions
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14
kernel/brick_mem.c
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@ -441,6 +441,7 @@ void _new_block_info(void *data, int len, int cline)
{
struct mem_block_info *inf;
int hash;
unsigned long flags;
for (;;) {
inf = kmalloc(sizeof(struct mem_block_info), GFP_BRICK);
@ -455,9 +456,9 @@ void _new_block_info(void *data, int len, int cline)
hash = INFO_LIST_HASH(data);
write_lock(&inf_lock[hash]);
write_lock_irqsave(&inf_lock[hash], flags);
list_add(&inf->inf_head, &inf_anchor[hash]);
write_unlock(&inf_lock[hash]);
write_unlock_irqrestore(&inf_lock[hash], flags);
}
static
@ -466,11 +467,12 @@ struct mem_block_info *_find_block_info(void *data, bool remove)
struct mem_block_info *res = NULL;
struct list_head *tmp;
int hash = INFO_LIST_HASH(data);
unsigned long flags;
if (remove)
write_lock(&inf_lock[hash]);
write_lock_irqsave(&inf_lock[hash], flags);
else
read_lock(&inf_lock[hash]);
read_lock_irqsave(&inf_lock[hash], flags);
for (tmp = inf_anchor[hash].next; tmp != &inf_anchor[hash]; tmp = tmp->next) {
struct mem_block_info *inf = container_of(tmp, struct mem_block_info, inf_head);
if (inf->inf_data != data)
@ -481,9 +483,9 @@ struct mem_block_info *_find_block_info(void *data, bool remove)
break;
}
if (remove)
write_unlock(&inf_lock[hash]);
write_unlock_irqrestore(&inf_lock[hash], flags);
else
read_unlock(&inf_lock[hash]);
read_unlock_irqrestore(&inf_lock[hash], flags);
return res;
}