The alpha1 of kernel 6.4 doesn't build.
Error messages:
Code: Select all
drivers/gpu/drm/ttm/ttm_pool.c:73:29: error: variably modified 'global_write_combined' at file scope
73 | static struct ttm_pool_type global_write_combined[TTM_DIM_ORDER];
| ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/ttm/ttm_pool.c:74:29: error: variably modified 'global_uncached' at file scope
74 | static struct ttm_pool_type global_uncached[TTM_DIM_ORDER];
| ^~~~~~~~~~~~~~~
drivers/gpu/drm/ttm/ttm_pool.c:76:29: error: variably modified 'global_dma32_write_combined' at file scope
76 | static struct ttm_pool_type global_dma32_write_combined[TTM_DIM_ORDER];
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/ttm/ttm_pool.c:77:29: error: variably modified 'global_dma32_uncached' at file scope
77 | static struct ttm_pool_type global_dma32_uncached[TTM_DIM_ORDER];
| ^~~~~~~~~~~~~~~~~~~~~
make[5]: *** [scripts/Makefile.build:252: drivers/gpu/drm/ttm/ttm_pool.o] Error 1
make[4]: *** [scripts/Makefile.build:494: drivers/gpu/drm/ttm] Error 2
make[3]: *** [scripts/Makefile.build:494: drivers/gpu/drm] Error 2
make[2]: *** [scripts/Makefile.build:494: drivers/gpu] Error 2
make[1]: *** [scripts/Makefile.build:494: drivers] Error 2
make[1]: *** Waiting for unfinished jobs....
There is a discussion about this issue:
drm/ttm: Reduce the number of used allocation orders for TTM pages
There is a patch:
Code: Select all
diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c
index 18c342a919a2..dfce896c4bae 100644
--- a/drivers/gpu/drm/ttm/ttm_pool.c
+++ b/drivers/gpu/drm/ttm/ttm_pool.c
@@ -47,11 +47,6 @@
#include "ttm_module.h"
-#define TTM_MAX_ORDER (PMD_SHIFT - PAGE_SHIFT)
-#define __TTM_DIM_ORDER (TTM_MAX_ORDER + 1)
-/* Some architectures have a weird PMD_SHIFT */
-#define TTM_DIM_ORDER (__TTM_DIM_ORDER <= MAX_ORDER ? __TTM_DIM_ORDER : MAX_ORDER)
-
/**
* struct ttm_pool_dma - Helper object for coherent DMA mappings
*
@@ -70,11 +65,11 @@ module_param(page_pool_size, ulong, 0644);
static atomic_long_t allocated_pages;
-static struct ttm_pool_type global_write_combined[TTM_DIM_ORDER];
-static struct ttm_pool_type global_uncached[TTM_DIM_ORDER];
+static struct ttm_pool_type global_write_combined[MAX_ORDER];
+static struct ttm_pool_type global_uncached[MAX_ORDER];
-static struct ttm_pool_type global_dma32_write_combined[TTM_DIM_ORDER];
-static struct ttm_pool_type global_dma32_uncached[TTM_DIM_ORDER];
+static struct ttm_pool_type global_dma32_write_combined[MAX_ORDER];
+static struct ttm_pool_type global_dma32_uncached[MAX_ORDER];
static spinlock_t shrinker_lock;
static struct list_head shrinker_list;
@@ -449,7 +444,7 @@ int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
else
gfp_flags |= GFP_HIGHUSER;
- for (order = min_t(unsigned int, TTM_MAX_ORDER, __fls(num_pages));
+ for (order = min_t(unsigned int, MAX_ORDER - 1, __fls(num_pages));
num_pages;
order = min_t(unsigned int, order, __fls(num_pages))) {
struct ttm_pool_type *pt;
@@ -568,7 +563,7 @@ void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
if (use_dma_alloc) {
for (i = 0; i < TTM_NUM_CACHING_TYPES; ++i)
- for (j = 0; j < TTM_DIM_ORDER; ++j)
+ for (j = 0; j < MAX_ORDER; ++j)
ttm_pool_type_init(&pool->caching[i].orders[j],
pool, i, j);
}
@@ -588,7 +583,7 @@ void ttm_pool_fini(struct ttm_pool *pool)
if (pool->use_dma_alloc) {
for (i = 0; i < TTM_NUM_CACHING_TYPES; ++i)
- for (j = 0; j < TTM_DIM_ORDER; ++j)
+ for (j = 0; j < MAX_ORDER; ++j)
ttm_pool_type_fini(&pool->caching[i].orders[j]);
}
@@ -642,7 +637,7 @@ static void ttm_pool_debugfs_header(struct seq_file *m)
unsigned int i;
seq_puts(m, "\t ");
- for (i = 0; i < TTM_DIM_ORDER; ++i)
+ for (i = 0; i < MAX_ORDER; ++i)
seq_printf(m, " ---%2u---", i);
seq_puts(m, "\n");
}
@@ -653,7 +648,7 @@ static void ttm_pool_debugfs_orders(struct ttm_pool_type *pt,
{
unsigned int i;
- for (i = 0; i < TTM_DIM_ORDER; ++i)
+ for (i = 0; i < MAX_ORDER; ++i)
seq_printf(m, " %8u", ttm_pool_type_count(&pt[i]));
seq_puts(m, "\n");
}
@@ -756,16 +751,13 @@ int ttm_pool_mgr_init(unsigned long num_pages)
{
unsigned int i;
- BUILD_BUG_ON(TTM_DIM_ORDER > MAX_ORDER);
- BUILD_BUG_ON(TTM_DIM_ORDER < 1);
-
if (!page_pool_size)
page_pool_size = num_pages;
spin_lock_init(&shrinker_lock);
INIT_LIST_HEAD(&shrinker_list);
- for (i = 0; i < TTM_DIM_ORDER; ++i) {
+ for (i = 0; i < MAX_ORDER; ++i) {
ttm_pool_type_init(&global_write_combined[i], NULL,
ttm_write_combined, i);
ttm_pool_type_init(&global_uncached[i], NULL, ttm_uncached, i);
@@ -798,7 +790,7 @@ void ttm_pool_mgr_fini(void)
{
unsigned int i;
- for (i = 0; i < TTM_DIM_ORDER; ++i) {
+ for (i = 0; i < MAX_ORDER; ++i) {
ttm_pool_type_fini(&global_write_combined[i]);
ttm_pool_type_fini(&global_uncached[i]);
Link:
drm/ttm: revert "Reduce the number of used allocation orders for TTM pages"
