[PATCH v4 1/8] drm: move drm_can_sleep() to drm_util.h

From: Sam Ravnborg
Date: Sat Jan 12 2019 - 14:33:32 EST

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Move drm_can_sleep() out of drmP.h to allow users
to get rid of the drmP.h include.

There was no header file that was a good match for this helper function.
So add this to drm_util with the relevant includes.

Add include of drm_util.h to all users.

v2:
- Update comments to use kernel-doc style (Daniel)
- Add FIXME to drm_can_sleep and add note that this
function should not be used in new code (Daniel)

v3:
- Fix kernel-doc syntax (Daniel)
- Plug drm_util.h into drm-internels.rst (Daniel)

Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
Cc: Sean Paul <sean@xxxxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: "Christian KÃnig" <christian.koenig@xxxxxxx>
Cc: "David (ChunMing) Zhou" <David1.Zhou@xxxxxxx>
Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: Rob Clark <robdclark@xxxxxxxxx>
Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Cc: Eric Anholt <eric@xxxxxxxxxx>
---
Documentation/gpu/drm-internals.rst | 9 ++++++
drivers/gpu/drm/amd/amdgpu/atom.c | 2 ++
drivers/gpu/drm/ast/ast_fb.c | 2 ++
drivers/gpu/drm/cirrus/cirrus_fbdev.c | 1 +
drivers/gpu/drm/drm_flip_work.c | 1 +
drivers/gpu/drm/mgag200/mgag200_fb.c | 1 +
drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c | 1 +
drivers/gpu/drm/omapdrm/omap_fbdev.c | 1 +
drivers/gpu/drm/qxl/qxl_cmd.c | 2 ++
drivers/gpu/drm/radeon/atom.c | 2 ++
drivers/gpu/drm/radeon/radeon_legacy_encoders.c | 1 +
drivers/gpu/drm/vc4/vc4_drv.h | 1 +
include/drm/drmP.h | 8 -----
include/drm/drm_util.h | 43 ++++++++++++++++++++++++-
14 files changed, 66 insertions(+), 9 deletions(-)

diff --git a/Documentation/gpu/drm-internals.rst b/Documentation/gpu/drm-internals.rst
index 9090fabf3f7a..2caf21effd28 100644
--- a/Documentation/gpu/drm-internals.rst
+++ b/Documentation/gpu/drm-internals.rst
@@ -233,6 +233,15 @@ Printer
.. kernel-doc:: drivers/gpu/drm/drm_print.c
:export:

+Utilities
+---------
+
+.. kernel-doc:: include/drm/drm_util.h
+ :doc: drm utils
+
+.. kernel-doc:: include/drm/drm_util.h
+ :internal:
+

Legacy Support Code
===================
diff --git a/drivers/gpu/drm/amd/amdgpu/atom.c b/drivers/gpu/drm/amd/amdgpu/atom.c
index e9934de1b9cf..dd30f4e61a8c 100644
--- a/drivers/gpu/drm/amd/amdgpu/atom.c
+++ b/drivers/gpu/drm/amd/amdgpu/atom.c
@@ -27,6 +27,8 @@
#include <linux/slab.h>
#include <asm/unaligned.h>

+#include <drm/drm_util.h>
+
#define ATOM_DEBUG

#include "atom.h"
diff --git a/drivers/gpu/drm/ast/ast_fb.c b/drivers/gpu/drm/ast/ast_fb.c
index 75f867d00031..2c9f8dd9733a 100644
--- a/drivers/gpu/drm/ast/ast_fb.c
+++ b/drivers/gpu/drm/ast/ast_fb.c
@@ -39,7 +39,9 @@
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>
+#include <drm/drm_util.h>
#include <drm/drm_crtc_helper.h>
+
#include "ast_drv.h"

static void ast_dirty_update(struct ast_fbdev *afbdev,
diff --git a/drivers/gpu/drm/cirrus/cirrus_fbdev.c b/drivers/gpu/drm/cirrus/cirrus_fbdev.c
index 4dd499c7d1ba..79fea1b8bc14 100644
--- a/drivers/gpu/drm/cirrus/cirrus_fbdev.c
+++ b/drivers/gpu/drm/cirrus/cirrus_fbdev.c
@@ -10,6 +10,7 @@
*/
#include <linux/module.h>
#include <drm/drmP.h>
+#include <drm/drm_util.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>

diff --git a/drivers/gpu/drm/drm_flip_work.c b/drivers/gpu/drm/drm_flip_work.c
index 12dea16f22a8..3da3bf5af405 100644
--- a/drivers/gpu/drm/drm_flip_work.c
+++ b/drivers/gpu/drm/drm_flip_work.c
@@ -22,6 +22,7 @@
*/

#include <drm/drmP.h>
+#include <drm/drm_util.h>
#include <drm/drm_flip_work.h>

/**
diff --git a/drivers/gpu/drm/mgag200/mgag200_fb.c b/drivers/gpu/drm/mgag200/mgag200_fb.c
index 30726c9fe28c..6893934b26c0 100644
--- a/drivers/gpu/drm/mgag200/mgag200_fb.c
+++ b/drivers/gpu/drm/mgag200/mgag200_fb.c
@@ -12,6 +12,7 @@
*/
#include <linux/module.h>
#include <drm/drmP.h>
+#include <drm/drm_util.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>

diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
index 7cebcb2b3a37..6153514db04c 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
@@ -16,6 +16,7 @@
* this program. If not, see <http://www.gnu.org/licenses/>.
*/

+#include <drm/drm_util.h>

#include "mdp5_kms.h"
#include "mdp5_smp.h"
diff --git a/drivers/gpu/drm/omapdrm/omap_fbdev.c b/drivers/gpu/drm/omapdrm/omap_fbdev.c
index aee99194499f..851c59f07eb1 100644
--- a/drivers/gpu/drm/omapdrm/omap_fbdev.c
+++ b/drivers/gpu/drm/omapdrm/omap_fbdev.c
@@ -16,6 +16,7 @@
*/

#include <drm/drm_crtc.h>
+#include <drm/drm_util.h>
#include <drm/drm_fb_helper.h>

#include "omap_drv.h"
diff --git a/drivers/gpu/drm/qxl/qxl_cmd.c b/drivers/gpu/drm/qxl/qxl_cmd.c
index dffc5093ff16..2e100f644236 100644
--- a/drivers/gpu/drm/qxl/qxl_cmd.c
+++ b/drivers/gpu/drm/qxl/qxl_cmd.c
@@ -25,6 +25,8 @@

/* QXL cmd/ring handling */

+#include <drm/drm_util.h>
+
#include "qxl_drv.h"
#include "qxl_object.h"

diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c
index e55cbeee7a53..ac98ad561870 100644
--- a/drivers/gpu/drm/radeon/atom.c
+++ b/drivers/gpu/drm/radeon/atom.c
@@ -27,6 +27,8 @@
#include <linux/slab.h>
#include <asm/unaligned.h>

+#include <drm/drm_util.h>
+
#define ATOM_DEBUG

#include "atom.h"
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
index 222a1fa41d7c..7e3257e8fd56 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
@@ -24,6 +24,7 @@
* Alex Deucher
*/
#include <drm/drmP.h>
+#include <drm/drm_util.h>
#include <drm/drm_crtc_helper.h>
#include <drm/radeon_drm.h>
#include "radeon.h"
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index c24b078f0593..2c635f001c71 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -9,6 +9,7 @@
#include <linux/mm_types.h>
#include <linux/reservation.h>
#include <drm/drmP.h>
+#include <drm/drm_util.h>
#include <drm/drm_encoder.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_atomic.h>
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 9e47c8dc6b87..bc4cb3732407 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -94,14 +94,6 @@ struct dma_buf_attachment;
struct pci_dev;
struct pci_controller;

-/* returns true if currently okay to sleep */
-static inline bool drm_can_sleep(void)
-{
- if (in_atomic() || in_dbg_master() || irqs_disabled())
- return false;
- return true;
-}
-
#if defined(CONFIG_DRM_DEBUG_SELFTEST_MODULE)
#define EXPORT_SYMBOL_FOR_TESTS_ONLY(x) EXPORT_SYMBOL(x)
#else
diff --git a/include/drm/drm_util.h b/include/drm/drm_util.h
index 88abdca89baa..f776a55e5508 100644
--- a/include/drm/drm_util.h
+++ b/include/drm/drm_util.h
@@ -26,7 +26,48 @@
#ifndef _DRM_UTIL_H_
#define _DRM_UTIL_H_

-/* helper for handling conditionals in various for_each macros */
+/**
+ * DOC: drm utils
+ *
+ * Macros and inline functions that does not naturally belong in other places
+ */
+
+#include <linux/irqflags.h>
+#include <linux/preempt.h>
+#include <linux/kgdb.h>
+#include <linux/smp.h>
+
+/**
+ * for_each_if - helper for handling conditionals in various for_each macros
+ * @condition: The condition to check
+ *
+ * Typical use::
+ *
+ * #define for_each_foo_bar(x, y) \'
+ * list_for_each_entry(x, y->list, head) \'
+ * for_each_if(x->something == SOMETHING)
+ *
+ * The for_each_if() macro makes the use of for_each_foo_bar() less error
+ * prone.
+ */
#define for_each_if(condition) if (!(condition)) {} else

+/**
+ * drm_can_sleep - returns true if currently okay to sleep
+ *
+ * This function shall not be used in new code.
+ * The check for running in atomic context may not work - see linux/preempt.h.
+ *
+ * FIXME: All users of drm_can_sleep should be removed (see todo.rst)
+ *
+ * Returns:
+ * True if kgdb is active or we are in an atomic context or irqs are disabled
+ */
+static inline bool drm_can_sleep(void)
+{
+ if (in_atomic() || in_dbg_master() || irqs_disabled())
+ return false;
+ return true;
+}
+
#endif
--
2.12.0

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