Rename fields in 'struct dma_page' in preparation for moving them into
'struct page'. No functional changes.
in_use -> dma_in_use
offset -> dma_free_off
Signed-off-by: Tony Battersby <to...@cybernetics.com>
---
--- linux/mm/dmapool.c.orig 2018-08-03 17:46:13.000000000 -0400
+++ linux/mm/dmapool.c 2018-08-03 17:46:24.000000000 -0400
@@ -65,8 +65,8 @@ struct dma_page { /* cacheable header f
struct list_head dma_list;
void *vaddr;
dma_addr_t dma;
- unsigned int in_use;
- unsigned int offset;
+ unsigned int dma_in_use;
+ unsigned int dma_free_off;
};
static DEFINE_MUTEX(pools_lock);
@@ -101,7 +101,7 @@ show_pools(struct device *dev, struct de
&pool->page_list[list_idx],
dma_list) {
pages++;
- blocks += page->in_use;
+ blocks += page->dma_in_use;
}
}
spin_unlock_irq(&pool->lock);
@@ -248,8 +248,8 @@ static struct dma_page *pool_alloc_page(
memset(page->vaddr, POOL_POISON_FREED, pool->allocation);
#endif
pool_initialise_page(pool, page);
- page->in_use = 0;
- page->offset = 0;
+ page->dma_in_use = 0;
+ page->dma_free_off = 0;
} else {
kfree(page);
page = NULL;
@@ -259,7 +259,7 @@ static struct dma_page *pool_alloc_page(
static inline bool is_page_busy(struct dma_page *page)
{
- return page->in_use != 0;
+ return page->dma_in_use != 0;
}
static void pool_free_page(struct dma_pool *pool, struct dma_page *page)
@@ -362,10 +362,10 @@ void *dma_pool_alloc(struct dma_pool *po
list_add(&page->dma_list, &pool->page_list[POOL_AVAIL_IDX]);
ready:
- page->in_use++;
- offset = page->offset;
- page->offset = *(int *)(page->vaddr + offset);
- if (page->offset >= pool->allocation)
+ page->dma_in_use++;
+ offset = page->dma_free_off;
+ page->dma_free_off = *(int *)(page->vaddr + offset);
+ if (page->dma_free_off >= pool->allocation)
/* Move page from the "available" list to the "full" list. */
list_move_tail(&page->dma_list,
&pool->page_list[POOL_FULL_IDX]);
@@ -375,8 +375,8 @@ void *dma_pool_alloc(struct dma_pool *po
{
int i;
u8 *data = retval;
- /* page->offset is stored in first 4 bytes */
- for (i = sizeof(page->offset); i < pool->size; i++) {
+ /* page->dma_free_off is stored in first 4 bytes */
+ for (i = sizeof(page->dma_free_off); i < pool->size; i++) {
if (data[i] == POOL_POISON_FREED)
continue;
dev_err(pool->dev,
@@ -458,7 +458,7 @@ void dma_pool_free(struct dma_pool *pool
return;
}
{
- unsigned int chain = page->offset;
+ unsigned int chain = page->dma_free_off;
while (chain < pool->allocation) {
if (chain != offset) {
chain = *(int *)(page->vaddr + chain);
@@ -474,12 +474,12 @@ void dma_pool_free(struct dma_pool *pool
memset(vaddr, POOL_POISON_FREED, pool->size);
#endif
- page->in_use--;
- if (page->offset >= pool->allocation)
+ page->dma_in_use--;
+ if (page->dma_free_off >= pool->allocation)
/* Move page from the "full" list to the "available" list. */
list_move(&page->dma_list, &pool->page_list[POOL_AVAIL_IDX]);
- *(int *)vaddr = page->offset;
- page->offset = offset;
+ *(int *)vaddr = page->dma_free_off;
+ page->dma_free_off = offset;
/*
* Resist a temptation to do
* if (!is_page_busy(page)) pool_free_page(pool, page);
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