DRM_DEBUG_CODE is currently always set, so distributions enable it. The only reason to keep support in code is if developers wanted to disable debug support. Sounds unlikely.
All the DRM_DEBUG() printks are still guarded by a drm_debug read. So if its cacheline is read once, they're discarded pretty fast.. There should hardly be any performance penalty, it's even guarded by unlikely().
Signed-off-by: David Herrmann dh.herrmann@gmail.com --- drivers/gpu/drm/drm_debugfs.c | 2 -- drivers/gpu/drm/drm_vm.c | 4 ---- drivers/gpu/drm/radeon/radeon.h | 17 ++++++++++++----- drivers/gpu/drm/radeon/radeon_ring.c | 21 --------------------- include/drm/drmP.h | 12 ------------ 5 files changed, 12 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 13bd429..4491dbd 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -49,9 +49,7 @@ static const struct drm_info_list drm_debugfs_list[] = { {"clients", drm_clients_info, 0}, {"bufs", drm_bufs_info, 0}, {"gem_names", drm_gem_name_info, DRIVER_GEM}, -#if DRM_DEBUG_CODE {"vma", drm_vma_info, 0}, -#endif }; #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c index 967e570..4b3e9c4 100644 --- a/drivers/gpu/drm/drm_vm.c +++ b/drivers/gpu/drm/drm_vm.c @@ -683,8 +683,6 @@ void drm_legacy_vma_flush(struct drm_device *dev) } }
-#if DRM_DEBUG_CODE - int drm_vma_info(struct seq_file *m, void *data) { struct drm_info_node *node = (struct drm_info_node *) m->private; @@ -738,5 +736,3 @@ int drm_vma_info(struct seq_file *m, void *data) mutex_unlock(&dev->struct_mutex); return 0; } - -#endif diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 83a2461..5cfa574 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -2761,18 +2761,25 @@ void radeon_atombios_fini(struct radeon_device *rdev); /* * RING helpers. */ -#if DRM_DEBUG_CODE == 0 + +/** + * radeon_ring_write - write a value to the ring + * + * @ring: radeon_ring structure holding ring information + * @v: dword (dw) value to write + * + * Write a value to the requested ring buffer (all asics). + */ static inline void radeon_ring_write(struct radeon_ring *ring, uint32_t v) { + if (ring->count_dw <= 0) + DRM_ERROR("radeon: writing more dwords to the ring than expected!\n"); + ring->ring[ring->wptr++] = v; ring->wptr &= ring->ptr_mask; ring->count_dw--; ring->ring_free_dw--; } -#else -/* With debugging this is just too big to inline */ -void radeon_ring_write(struct radeon_ring *ring, uint32_t v); -#endif
/* * ASICs macro. diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c index d656079..6f2a9bd 100644 --- a/drivers/gpu/drm/radeon/radeon_ring.c +++ b/drivers/gpu/drm/radeon/radeon_ring.c @@ -45,27 +45,6 @@ static int radeon_debugfs_ring_init(struct radeon_device *rdev, struct radeon_ring *ring);
/** - * radeon_ring_write - write a value to the ring - * - * @ring: radeon_ring structure holding ring information - * @v: dword (dw) value to write - * - * Write a value to the requested ring buffer (all asics). - */ -void radeon_ring_write(struct radeon_ring *ring, uint32_t v) -{ -#if DRM_DEBUG_CODE - if (ring->count_dw <= 0) { - DRM_ERROR("radeon: writing more dwords to the ring than expected!\n"); - } -#endif - ring->ring[ring->wptr++] = v; - ring->wptr &= ring->ptr_mask; - ring->count_dw--; - ring->ring_free_dw--; -} - -/** * radeon_ring_supports_scratch_reg - check if the ring supports * writing to scratch registers * diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 8b3f3b7..8f55875 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -140,9 +140,6 @@ int drm_err(const char *func, const char *format, ...); /** \name Begin the DRM... */ /*@{*/
-#define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then - also include looping detection. */ - #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
/*@}*/ @@ -188,7 +185,6 @@ int drm_err(const char *func, const char *format, ...); * \param fmt printf() like format string. * \param arg arguments */ -#if DRM_DEBUG_CODE #define DRM_DEBUG(fmt, args...) \ do { \ if (unlikely(drm_debug & DRM_UT_CORE)) \ @@ -210,12 +206,6 @@ int drm_err(const char *func, const char *format, ...); if (unlikely(drm_debug & DRM_UT_PRIME)) \ drm_ut_debug_printk(__func__, fmt, ##args); \ } while (0) -#else -#define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0) -#define DRM_DEBUG_KMS(fmt, args...) do { } while (0) -#define DRM_DEBUG_PRIME(fmt, args...) do { } while (0) -#define DRM_DEBUG(fmt, arg...) do { } while (0) -#endif
/*@}*/
@@ -1348,9 +1338,7 @@ void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv); void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv); void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
-#if DRM_DEBUG_CODE extern int drm_vma_info(struct seq_file *m, void *data); -#endif
/* Scatter Gather Support (drm_scatter.h) */ extern void drm_legacy_sg_cleanup(struct drm_device *dev);