minigbm: re-const-ify driver backends

minigbm driver creation needs to be re-entrant (see CL:674528). Let's
re-constify to make this behavior explicit.

BUG=none
TEST=emerge-eve {minigbm, arc-cros-gralloc}

Change-Id: I037966199d4aa6de60432127e10fea1fb602694b
Reviewed-on: https://chromium-review.googlesource.com/758142
Commit-Ready: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>

17 files changed, 33 insertions, 33 deletions

diff --git a/amdgpu.c b/amdgpu.c
index d91006d..aa3d599 100644
--- a/amdgpu.c
+++ b/amdgpu.c
@@ -426,7 +426,7 @@ static uint32_t amdgpu_resolve_format(uint32_t format, uint64_t use_flags)
 	}
 }
 
-struct backend backend_amdgpu = {
+const struct backend backend_amdgpu = {
 	.name = "amdgpu",
 	.init = amdgpu_init,
 	.close = amdgpu_close,
diff --git a/drv.c b/drv.c
index 683bea7..99ec561 100644
--- a/drv.c
+++ b/drv.c
@@ -21,40 +21,40 @@
 #include "util.h"
 
 #ifdef DRV_AMDGPU
-extern struct backend backend_amdgpu;
+extern const struct backend backend_amdgpu;
 #endif
-extern struct backend backend_evdi;
+extern const struct backend backend_evdi;
 #ifdef DRV_EXYNOS
-extern struct backend backend_exynos;
+extern const struct backend backend_exynos;
 #endif
-extern struct backend backend_gma500;
+extern const struct backend backend_gma500;
 #ifdef DRV_I915
-extern struct backend backend_i915;
+extern const struct backend backend_i915;
 #endif
 #ifdef DRV_MARVELL
-extern struct backend backend_marvell;
+extern const struct backend backend_marvell;
 #endif
 #ifdef DRV_MEDIATEK
-extern struct backend backend_mediatek;
+extern const struct backend backend_mediatek;
 #endif
-extern struct backend backend_nouveau;
+extern const struct backend backend_nouveau;
 #ifdef DRV_RADEON
-extern struct backend backend_radeon;
+extern const struct backend backend_radeon;
 #endif
 #ifdef DRV_ROCKCHIP
-extern struct backend backend_rockchip;
+extern const struct backend backend_rockchip;
 #endif
 #ifdef DRV_TEGRA
-extern struct backend backend_tegra;
+extern const struct backend backend_tegra;
 #endif
-extern struct backend backend_udl;
+extern const struct backend backend_udl;
 #ifdef DRV_VC4
-extern struct backend backend_vc4;
+extern const struct backend backend_vc4;
 #endif
-extern struct backend backend_vgem;
-extern struct backend backend_virtio_gpu;
+extern const struct backend backend_vgem;
+extern const struct backend backend_virtio_gpu;
 
-static struct backend *drv_get_backend(int fd)
+static const struct backend *drv_get_backend(int fd)
 {
 	drmVersionPtr drm_version;
 	unsigned int i;
@@ -64,7 +64,7 @@ static struct backend *drv_get_backend(int fd)
 	if (!drm_version)
 		return NULL;
 
-	struct backend *backend_list[] = {
+	const struct backend *backend_list[] = {
 #ifdef DRV_AMDGPU
 		&backend_amdgpu,
 #endif
diff --git a/drv_priv.h b/drv_priv.h
index 3399cc7..09007de 100644
--- a/drv_priv.h
+++ b/drv_priv.h
@@ -57,7 +57,7 @@ struct combinations {
 
 struct driver {
 	int fd;
-	struct backend *backend;
+	const struct backend *backend;
 	void *priv;
 	void *buffer_table;
 	void *map_table;
diff --git a/evdi.c b/evdi.c
index 829d6ea..3bac658 100644
--- a/evdi.c
+++ b/evdi.c
@@ -21,7 +21,7 @@ static int evdi_init(struct driver *drv)
 	return drv_modify_linear_combinations(drv);
 }
 
-struct backend backend_evdi = {
+const struct backend backend_evdi = {
 	.name = "evdi",
 	.init = evdi_init,
 	.bo_create = drv_dumb_bo_create,
diff --git a/exynos.c b/exynos.c
index 963f030..455416e 100644
--- a/exynos.c
+++ b/exynos.c
@@ -105,7 +105,7 @@ cleanup_planes:
  * Use dumb mapping with exynos even though a GEM buffer is created.
  * libdrm does the same thing in exynos_drm.c
  */
-struct backend backend_exynos = {
+const struct backend backend_exynos = {
 	.name = "exynos",
 	.init = exynos_init,
 	.bo_create = exynos_bo_create,
diff --git a/gma500.c b/gma500.c
index c3f3c12..bcc3bc8 100644
--- a/gma500.c
+++ b/gma500.c
@@ -21,7 +21,7 @@ static int gma500_init(struct driver *drv)
 	return drv_modify_linear_combinations(drv);
 }
 
-struct backend backend_gma500 = {
+const struct backend backend_gma500 = {
 	.name = "gma500",
 	.init = gma500_init,
 	.bo_create = drv_dumb_bo_create,
diff --git a/i915.c b/i915.c
index 5869a59..2dc2484 100644
--- a/i915.c
+++ b/i915.c
@@ -547,7 +547,7 @@ static uint32_t i915_resolve_format(uint32_t format, uint64_t use_flags)
 	}
 }
 
-struct backend backend_i915 = {
+const struct backend backend_i915 = {
 	.name = "i915",
 	.init = i915_init,
 	.close = i915_close,
diff --git a/marvell.c b/marvell.c
index 455b033..f209139 100644
--- a/marvell.c
+++ b/marvell.c
@@ -24,7 +24,7 @@ static int marvell_init(struct driver *drv)
 					   ARRAY_SIZE(render_target_formats));
 }
 
-struct backend backend_marvell = {
+const struct backend backend_marvell = {
 	.name = "marvell",
 	.init = marvell_init,
 	.bo_create = drv_dumb_bo_create,
diff --git a/mediatek.c b/mediatek.c
index 1a1061c..e902d3b 100644
--- a/mediatek.c
+++ b/mediatek.c
@@ -145,7 +145,7 @@ static uint32_t mediatek_resolve_format(uint32_t format, uint64_t use_flags)
 	}
 }
 
-struct backend backend_mediatek = {
+const struct backend backend_mediatek = {
 	.name = "mediatek",
 	.init = mediatek_init,
 	.bo_create = mediatek_bo_create,
diff --git a/nouveau.c b/nouveau.c
index e8a02e3..4efbda2 100644
--- a/nouveau.c
+++ b/nouveau.c
@@ -21,7 +21,7 @@ static int nouveau_init(struct driver *drv)
 	return drv_modify_linear_combinations(drv);
 }
 
-struct backend backend_nouveau = {
+const struct backend backend_nouveau = {
 	.name = "nouveau",
 	.init = nouveau_init,
 	.bo_create = drv_dumb_bo_create,
diff --git a/radeon.c b/radeon.c
index 3af0be1..84b01c5 100644
--- a/radeon.c
+++ b/radeon.c
@@ -21,7 +21,7 @@ static int radeon_init(struct driver *drv)
 	return drv_modify_linear_combinations(drv);
 }
 
-struct backend backend_radeon = {
+const struct backend backend_radeon = {
 	.name = "radeon",
 	.init = radeon_init,
 	.bo_create = drv_dumb_bo_create,
diff --git a/rockchip.c b/rockchip.c
index 5fb0be4..2678f77 100644
--- a/rockchip.c
+++ b/rockchip.c
@@ -314,7 +314,7 @@ static uint32_t rockchip_resolve_format(uint32_t format, uint64_t use_flags)
 	}
 }
 
-struct backend backend_rockchip = {
+const struct backend backend_rockchip = {
 	.name = "rockchip",
 	.init = rockchip_init,
 	.bo_create = rockchip_bo_create,
diff --git a/tegra.c b/tegra.c
index d16a182..7842ea2 100644
--- a/tegra.c
+++ b/tegra.c
@@ -353,7 +353,7 @@ static int tegra_bo_flush(struct bo *bo, struct map_info *data)
 	return 0;
 }
 
-struct backend backend_tegra = {
+const struct backend backend_tegra = {
 	.name = "tegra",
 	.init = tegra_init,
 	.bo_create = tegra_bo_create,
diff --git a/udl.c b/udl.c
index dc3c4eb..5ec2307 100644
--- a/udl.c
+++ b/udl.c
@@ -21,7 +21,7 @@ static int udl_init(struct driver *drv)
 	return drv_modify_linear_combinations(drv);
 }
 
-struct backend backend_udl = {
+const struct backend backend_udl = {
 	.name = "udl",
 	.init = udl_init,
 	.bo_create = drv_dumb_bo_create,
diff --git a/vc4.c b/vc4.c
index 20431d9..4c0ae6f 100644
--- a/vc4.c
+++ b/vc4.c
@@ -81,7 +81,7 @@ static void *vc4_bo_map(struct bo *bo, struct map_info *data, size_t plane, uint
 		    bo_map.offset);
 }
 
-struct backend backend_vc4 = {
+const struct backend backend_vc4 = {
 	.name = "vc4",
 	.init = vc4_init,
 	.bo_create = vc4_bo_create,
diff --git a/vgem.c b/vgem.c
index 867b439..a4e893b 100644
--- a/vgem.c
+++ b/vgem.c
@@ -60,7 +60,7 @@ static uint32_t vgem_resolve_format(uint32_t format, uint64_t flags)
 	}
 }
 
-struct backend backend_vgem = {
+const struct backend backend_vgem = {
 	.name = "vgem",
 	.init = vgem_init,
 	.bo_create = vgem_bo_create,
diff --git a/virtio_gpu.c b/virtio_gpu.c
index 6548e59..447a17d 100644
--- a/virtio_gpu.c
+++ b/virtio_gpu.c
@@ -60,7 +60,7 @@ static uint32_t virtio_gpu_resolve_format(uint32_t format, uint64_t use_flags)
 	}
 }
 
-struct backend backend_virtio_gpu = {
+const struct backend backend_virtio_gpu = {
 	.name = "virtio_gpu",
 	.init = virtio_gpu_init,
 	.bo_create = virtio_gpu_bo_create,