dma/debug: Remove dma_debug_resize_entries()

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>

diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index 30213ad..46e6131 100644 (file)
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -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)
 {

diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index 912c23f..36a4287 100644 (file)
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -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
  *