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dma/debug: Remove dma_debug_resize_entries()

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With the only caller now gone, we can clean up this part of dma-debug's
exposed internals and make way to tweak the allocation behaviour.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Qian Cai <cai@lca.pw>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Robin Murphy 2018-12-10 14:00:32 +00:00 committed by Christoph Hellwig
parent a8a4c98fc9
commit 0cb0e25e42
2 changed files with 0 additions and 53 deletions
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7
include/linux/dma-debug.h
View file

@ -30,8 +30,6 @@ struct bus_type;
extern void dma_debug_add_bus(struct bus_type *bus);
extern int dma_debug_resize_entries(u32 num_entries);
extern void debug_dma_map_single(struct device *dev, const void *addr,
unsigned long len);
@ -101,11 +99,6 @@ static inline void dma_debug_add_bus(struct bus_type *bus)
{
}
static inline int dma_debug_resize_entries(u32 num_entries)
{
return 0;
}
static inline void debug_dma_map_single(struct device *dev, const void *addr,
unsigned long len)
{

46
kernel/dma/debug.c
View file

@ -755,52 +755,6 @@ static void dma_entry_free(struct dma_debug_entry *entry)
spin_unlock_irqrestore(&free_entries_lock, flags);
}
int dma_debug_resize_entries(u32 num_entries)
{
int i, delta, ret = 0;
unsigned long flags;
struct dma_debug_entry *entry;
LIST_HEAD(tmp);
spin_lock_irqsave(&free_entries_lock, flags);
if (nr_total_entries < num_entries) {
delta = num_entries - nr_total_entries;
spin_unlock_irqrestore(&free_entries_lock, flags);
for (i = 0; i < delta; i++) {
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
break;
list_add_tail(&entry->list, &tmp);
}
spin_lock_irqsave(&free_entries_lock, flags);
list_splice(&tmp, &free_entries);
nr_total_entries += i;
num_free_entries += i;
} else {
delta = nr_total_entries - num_entries;
for (i = 0; i < delta && !list_empty(&free_entries); i++) {
entry = __dma_entry_alloc();
kfree(entry);
}
nr_total_entries -= i;
}
if (nr_total_entries != num_entries)
ret = 1;
spin_unlock_irqrestore(&free_entries_lock, flags);
return ret;
}
/*
* DMA-API debugging init code
*