diff --git a/intern/ghost/GHOST_C-api.h b/intern/ghost/GHOST_C-api.h
index b7723478c26..e59a9ac65ad 100644
--- a/intern/ghost/GHOST_C-api.h
+++ b/intern/ghost/GHOST_C-api.h
@@ -238,7 +238,7 @@ extern bool GHOST_ValidWindow(GHOST_SystemHandle systemhandle, GHOST_WindowHandl
  *         This window is invalid after full screen has been ended.
  */
 extern GHOST_WindowHandle GHOST_BeginFullScreen(GHOST_SystemHandle systemhandle,
-                                                GHOST_DisplaySetting *setting,
+                                                const GHOST_DisplaySetting *setting,
                                                 const bool stereoVisual);
 
 /**
@@ -429,7 +429,7 @@ void GHOST_GetCursorGrabState(GHOST_WindowHandle windowhandle,
 extern GHOST_TSuccess GHOST_SetCursorGrab(GHOST_WindowHandle windowhandle,
                                           GHOST_TGrabCursorMode mode,
                                           GHOST_TAxisFlag wrap_axis,
-                                          int bounds[4],
+                                          const int bounds[4],
                                           const int mouse_ungrab_xy[2]);
 
 /***************************************************************************************
diff --git a/intern/ghost/intern/GHOST_C-api.cc b/intern/ghost/intern/GHOST_C-api.cc
index 45e14347118..063489b3f41 100644
--- a/intern/ghost/intern/GHOST_C-api.cc
+++ b/intern/ghost/intern/GHOST_C-api.cc
@@ -216,7 +216,7 @@ bool GHOST_ValidWindow(GHOST_SystemHandle systemhandle, GHOST_WindowHandle windo
 }
 
 GHOST_WindowHandle GHOST_BeginFullScreen(GHOST_SystemHandle systemhandle,
-                                         GHOST_DisplaySetting *setting,
+                                         const GHOST_DisplaySetting *setting,
                                          const bool stereoVisual)
 {
   GHOST_ISystem *system = (GHOST_ISystem *)systemhandle;
@@ -409,7 +409,7 @@ GHOST_TSuccess GHOST_SetCursorPosition(GHOST_SystemHandle systemhandle,
 GHOST_TSuccess GHOST_SetCursorGrab(GHOST_WindowHandle windowhandle,
                                    GHOST_TGrabCursorMode mode,
                                    GHOST_TAxisFlag wrap_axis,
-                                   int bounds[4],
+                                   const int bounds[4],
                                    const int mouse_ungrab_xy[2])
 {
   GHOST_IWindow *window = (GHOST_IWindow *)windowhandle;
@@ -781,7 +781,7 @@ int32_t GHOST_GetHeightRectangle(GHOST_RectangleHandle rectanglehandle)
 void GHOST_GetRectangle(
     GHOST_RectangleHandle rectanglehandle, int32_t *l, int32_t *t, int32_t *r, int32_t *b)
 {
-  GHOST_Rect *rect = (GHOST_Rect *)rectanglehandle;
+  const GHOST_Rect *rect = (GHOST_Rect *)rectanglehandle;
 
   *l = rect->m_l;
   *t = rect->m_t;
diff --git a/intern/ghost/intern/GHOST_DisplayManagerX11.cc b/intern/ghost/intern/GHOST_DisplayManagerX11.cc
index 4f28662091b..39d453d0fe7 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerX11.cc
+++ b/intern/ghost/intern/GHOST_DisplayManagerX11.cc
@@ -67,7 +67,7 @@ GHOST_TSuccess GHOST_DisplayManagerX11::getNumDisplaySettings(uint8_t display,
 
 /* from SDL2 */
 #ifdef WITH_X11_XF86VMODE
-static int calculate_rate(XF86VidModeModeInfo *info)
+static int calculate_rate(const XF86VidModeModeInfo *info)
 {
   return (info->htotal && info->vtotal) ? (1000 * info->dotclock / (info->htotal * info->vtotal)) :
                                           0;
diff --git a/intern/ghost/intern/GHOST_NDOFManager.cc b/intern/ghost/intern/GHOST_NDOFManager.cc
index ac3e6d7bcfd..413bfec75f7 100644
--- a/intern/ghost/intern/GHOST_NDOFManager.cc
+++ b/intern/ghost/intern/GHOST_NDOFManager.cc
@@ -527,14 +527,14 @@ void GHOST_NDOFManager::setDeadZone(float dz)
   CLOG_INFO(LOG, 2, "dead zone set to %.2f%s", dz, (dz > 0.5f) ? " (unexpectedly high)" : "");
 }
 
-static bool atHomePosition(GHOST_TEventNDOFMotionData *ndof)
+static bool atHomePosition(const GHOST_TEventNDOFMotionData *ndof)
 {
 #define HOME(foo) (ndof->foo == 0.0f)
   return HOME(tx) && HOME(ty) && HOME(tz) && HOME(rx) && HOME(ry) && HOME(rz);
 #undef HOME
 }
 
-static bool nearHomePosition(GHOST_TEventNDOFMotionData *ndof, float threshold)
+static bool nearHomePosition(const GHOST_TEventNDOFMotionData *ndof, float threshold)
 {
   if (threshold == 0.0f) {
     return atHomePosition(ndof);
diff --git a/source/blender/blenkernel/BKE_gpencil_legacy.h b/source/blender/blenkernel/BKE_gpencil_legacy.h
index fbb8fe570a9..1918ea14711 100644
--- a/source/blender/blenkernel/BKE_gpencil_legacy.h
+++ b/source/blender/blenkernel/BKE_gpencil_legacy.h
@@ -461,7 +461,7 @@ void BKE_gpencil_layer_mask_cleanup_all_layers(struct bGPdata *gpd);
 void BKE_gpencil_layer_frames_sort(struct bGPDlayer *gpl, bool *r_has_duplicate_frames);
 
 struct bGPDlayer *BKE_gpencil_layer_get_by_name(struct bGPdata *gpd,
-                                                char *name,
+                                                const char *name,
                                                 int first_if_not_found);
 
 /* Brush */
diff --git a/source/blender/blenkernel/BKE_lib_query.h b/source/blender/blenkernel/BKE_lib_query.h
index 2fd5735bbbb..dd12b498935 100644
--- a/source/blender/blenkernel/BKE_lib_query.h
+++ b/source/blender/blenkernel/BKE_lib_query.h
@@ -193,11 +193,11 @@ typedef struct LibraryForeachIDData LibraryForeachIDData;
  * Check whether current iteration over ID usages should be stopped or not.
  * \return true if the iteration should be stopped, false otherwise.
  */
-bool BKE_lib_query_foreachid_iter_stop(struct LibraryForeachIDData *data);
+bool BKE_lib_query_foreachid_iter_stop(const struct LibraryForeachIDData *data);
 void BKE_lib_query_foreachid_process(struct LibraryForeachIDData *data,
                                      struct ID **id_pp,
                                      int cb_flag);
-int BKE_lib_query_foreachid_process_flags_get(struct LibraryForeachIDData *data);
+int BKE_lib_query_foreachid_process_flags_get(const struct LibraryForeachIDData *data);
 int BKE_lib_query_foreachid_process_callback_flag_override(struct LibraryForeachIDData *data,
                                                            int cb_flag,
                                                            bool do_replace);
diff --git a/source/blender/blenkernel/intern/curve_deform.c b/source/blender/blenkernel/intern/curve_deform.c
index 456f5919db1..b2e51871122 100644
--- a/source/blender/blenkernel/intern/curve_deform.c
+++ b/source/blender/blenkernel/intern/curve_deform.c
@@ -89,7 +89,7 @@ static bool calc_curve_deform(
       }
     }
     else {
-      CurveCache *cc = ob_curve->runtime.curve_cache;
+      const CurveCache *cc = ob_curve->runtime.curve_cache;
       float totdist = BKE_anim_path_get_length(cc);
       if (LIKELY(totdist > FLT_EPSILON)) {
         fac = -(co[index] - cd->dmax[index]) / totdist;
@@ -111,7 +111,7 @@ static bool calc_curve_deform(
       }
     }
     else {
-      CurveCache *cc = ob_curve->runtime.curve_cache;
+      const CurveCache *cc = ob_curve->runtime.curve_cache;
       float totdist = BKE_anim_path_get_length(cc);
       if (LIKELY(totdist > FLT_EPSILON)) {
         fac = +(co[index] - cd->dmin[index]) / totdist;
diff --git a/source/blender/blenkernel/intern/gpencil_legacy.c b/source/blender/blenkernel/intern/gpencil_legacy.c
index 8d58ed8bcc8..dedb1e0e229 100644
--- a/source/blender/blenkernel/intern/gpencil_legacy.c
+++ b/source/blender/blenkernel/intern/gpencil_legacy.c
@@ -1573,7 +1573,7 @@ bGPDlayer *BKE_gpencil_layer_active_get(bGPdata *gpd)
   return NULL;
 }
 
-bGPDlayer *BKE_gpencil_layer_get_by_name(bGPdata *gpd, char *name, int first_if_not_found)
+bGPDlayer *BKE_gpencil_layer_get_by_name(bGPdata *gpd, const char *name, int first_if_not_found)
 {
   bGPDlayer *gpl;
 
diff --git a/source/blender/blenkernel/intern/lib_query.c b/source/blender/blenkernel/intern/lib_query.c
index afafdb08f42..fde97ecca5c 100644
--- a/source/blender/blenkernel/intern/lib_query.c
+++ b/source/blender/blenkernel/intern/lib_query.c
@@ -61,7 +61,7 @@ typedef struct LibraryForeachIDData {
   BLI_LINKSTACK_DECLARE(ids_todo, ID *);
 } LibraryForeachIDData;
 
-bool BKE_lib_query_foreachid_iter_stop(LibraryForeachIDData *data)
+bool BKE_lib_query_foreachid_iter_stop(const LibraryForeachIDData *data)
 {
   return (data->status & IDWALK_STOP) != 0;
 }
@@ -107,7 +107,7 @@ void BKE_lib_query_foreachid_process(LibraryForeachIDData *data, ID **id_pp, int
   }
 }
 
-int BKE_lib_query_foreachid_process_flags_get(LibraryForeachIDData *data)
+int BKE_lib_query_foreachid_process_flags_get(const LibraryForeachIDData *data)
 {
   return data->flag;
 }
diff --git a/source/blender/blenkernel/intern/particle_child.c b/source/blender/blenkernel/intern/particle_child.c
index c244f1fbd12..714e76b1c94 100644
--- a/source/blender/blenkernel/intern/particle_child.c
+++ b/source/blender/blenkernel/intern/particle_child.c
@@ -568,7 +568,7 @@ static float do_clump_level(float result[3],
                             float clumpfac,
                             float clumppow,
                             float pa_clump,
-                            CurveMapping *clumpcurve)
+                            const CurveMapping *clumpcurve)
 {
   float clump = 0.0f;
 
@@ -610,7 +610,7 @@ float do_clump(ParticleKey *state,
                float pa_clump,
                bool use_clump_noise,
                float clump_noise_size,
-               CurveMapping *clumpcurve)
+               const CurveMapping *clumpcurve)
 {
   float clump;
 
@@ -726,7 +726,7 @@ static void twist_get_axis(const ParticleChildModifierContext *modifier_ctx,
   }
 }
 
-static float BKE_curvemapping_integrate_clamped(CurveMapping *curve,
+static float BKE_curvemapping_integrate_clamped(const CurveMapping *curve,
                                                 float start,
                                                 float end,
                                                 float step)
diff --git a/source/blender/blenkernel/particle_private.h b/source/blender/blenkernel/particle_private.h
index 47f77ab0320..5b9263f236e 100644
--- a/source/blender/blenkernel/particle_private.h
+++ b/source/blender/blenkernel/particle_private.h
@@ -49,7 +49,7 @@ float do_clump(ParticleKey *state,
                float pa_clump,
                bool use_clump_noise,
                float clump_noise_size,
-               struct CurveMapping *clumpcurve);
+               const struct CurveMapping *clumpcurve);
 void do_child_modifiers(const ParticleChildModifierContext *modifier_ctx,
                         float mat[4][4],
                         ParticleKey *state,
diff --git a/source/blender/blenlib/BLI_hash_md5.h b/source/blender/blenlib/BLI_hash_md5.h
index 8acb3355853..eaebcc53a61 100644
--- a/source/blender/blenlib/BLI_hash_md5.h
+++ b/source/blender/blenlib/BLI_hash_md5.h
@@ -26,7 +26,7 @@ void *BLI_hash_md5_buffer(const char *buffer, size_t len, void *resblock);
  */
 int BLI_hash_md5_stream(FILE *stream, void *resblock);
 
-char *BLI_hash_md5_to_hexdigest(void *resblock, char r_hex_digest[33]);
+char *BLI_hash_md5_to_hexdigest(const void *resblock, char r_hex_digest[33]);
 
 #ifdef __cplusplus
 }
diff --git a/source/blender/blenlib/BLI_string_utf8.h b/source/blender/blenlib/BLI_string_utf8.h
index 493326f1983..bddc03b1922 100644
--- a/source/blender/blenlib/BLI_string_utf8.h
+++ b/source/blender/blenlib/BLI_string_utf8.h
@@ -168,7 +168,7 @@ size_t BLI_strncpy_wchar_as_utf8(char *__restrict dst,
                                  size_t dst_maxncpy) ATTR_NONNULL(1, 2);
 size_t BLI_strncpy_wchar_from_utf8(wchar_t *__restrict dst_w,
                                    const char *__restrict src_c,
-                                   size_t dst_maxncpy) ATTR_NONNULL(1, 2);
+                                   size_t dst_w_maxncpy) ATTR_NONNULL(1, 2);
 
 /**
  * Count columns that character/string occupies (based on `wcwidth.co`).
diff --git a/source/blender/blenlib/intern/hash_md5.c b/source/blender/blenlib/intern/hash_md5.c
index 19bc60cf0e6..821a11abd78 100644
--- a/source/blender/blenlib/intern/hash_md5.c
+++ b/source/blender/blenlib/intern/hash_md5.c
@@ -379,7 +379,7 @@ void *BLI_hash_md5_buffer(const char *buffer, size_t len, void *resblock)
   return md5_read_ctx(&ctx, resblock);
 }
 
-char *BLI_hash_md5_to_hexdigest(void *resblock, char r_hex_digest[33])
+char *BLI_hash_md5_to_hexdigest(const void *resblock, char r_hex_digest[33])
 {
   static const char hex_map[17] = "0123456789abcdef";
   const unsigned char *p;
diff --git a/source/blender/blenlib/intern/polyfill_2d.c b/source/blender/blenlib/intern/polyfill_2d.c
index 8c0a43a03ea..d0078e8f404 100644
--- a/source/blender/blenlib/intern/polyfill_2d.c
+++ b/source/blender/blenlib/intern/polyfill_2d.c
@@ -144,7 +144,7 @@ typedef struct PolyIndex {
 
 /* based on libgdx 2013-11-28, apache 2.0 licensed */
 
-static void pf_coord_sign_calc(PolyFill *pf, PolyIndex *pi);
+static void pf_coord_sign_calc(const PolyFill *pf, PolyIndex *pi);
 
 static PolyIndex *pf_ear_tip_find(PolyFill *pf
 #ifdef USE_CLIP_EVEN
@@ -576,7 +576,7 @@ static void pf_triangulate(PolyFill *pf)
 /**
  * \return CONCAVE, TANGENTIAL or CONVEX
  */
-static void pf_coord_sign_calc(PolyFill *pf, PolyIndex *pi)
+static void pf_coord_sign_calc(const PolyFill *pf, PolyIndex *pi)
 {
   /* localize */
   const float(*coords)[2] = pf->coords;
diff --git a/source/blender/editors/space_view3d/view3d_project.c b/source/blender/editors/space_view3d/view3d_project.c
index b2e11b8ec72..968f3c9a7b7 100644
--- a/source/blender/editors/space_view3d/view3d_project.c
+++ b/source/blender/editors/space_view3d/view3d_project.c
@@ -108,7 +108,7 @@ static eV3DProjStatus ed_view3d_project__internal(const ARegion *region,
   BLI_assert((flag & V3D_PROJ_TEST_ALL) == flag);
 
   if (flag & V3D_PROJ_TEST_CLIP_BB) {
-    RegionView3D *rv3d = region->regiondata;
+    const RegionView3D *rv3d = region->regiondata;
     if (rv3d->rflag & RV3D_CLIPPING) {
       if (ED_view3d_clipping_test(rv3d, co, is_local)) {
         return V3D_PROJ_RET_CLIP_BB;
@@ -326,7 +326,7 @@ static void view3d_win_to_ray_segment(const struct Depsgraph *depsgraph,
                                       float r_ray_start[3],
                                       float r_ray_end[3])
 {
-  RegionView3D *rv3d = region->regiondata;
+  const RegionView3D *rv3d = region->regiondata;
   float _ray_co[3], _ray_dir[3], start_offset, end_offset;
 
   if (!r_ray_co) {
diff --git a/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_util.c b/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_util.c
index e800eaeeaf1..a5a0e7e1fcc 100644
--- a/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_util.c
+++ b/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_util.c
@@ -141,7 +141,7 @@ bool is_stroke_affected_by_modifier(Object *ob,
   return true;
 }
 
-float get_modifier_point_weight(MDeformVert *dvert, bool inverse, int def_nr)
+float get_modifier_point_weight(const MDeformVert *dvert, bool inverse, int def_nr)
 {
   float weight = 1.0f;
 
diff --git a/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_util.h b/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_util.h
index 249788ec420..f9e6a131cdd 100644
--- a/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_util.h
+++ b/source/blender/gpencil_modifiers_legacy/intern/MOD_gpencil_legacy_util.h
@@ -36,7 +36,7 @@ bool is_stroke_affected_by_modifier(struct Object *ob,
 /**
  * Verify if valid vertex group *and return weight.
  */
-float get_modifier_point_weight(struct MDeformVert *dvert, bool inverse, int def_nr);
+float get_modifier_point_weight(const struct MDeformVert *dvert, bool inverse, int def_nr);
 /**
  * Generic bake function for deformStroke.
  */
diff --git a/source/blender/imbuf/intern/readimage.cc b/source/blender/imbuf/intern/readimage.cc
index 355d5da2a35..bb3d7604019 100644
--- a/source/blender/imbuf/intern/readimage.cc
+++ b/source/blender/imbuf/intern/readimage.cc
@@ -33,7 +33,7 @@
 static void imb_handle_alpha(ImBuf *ibuf,
                              int flags,
                              char colorspace[IM_MAX_SPACE],
-                             char effective_colorspace[IM_MAX_SPACE])
+                             const char effective_colorspace[IM_MAX_SPACE])
 {
   if (colorspace) {
     if (ibuf->byte_buffer.data != nullptr && ibuf->float_buffer.data == nullptr) {
diff --git a/source/blender/makesrna/intern/rna_depsgraph.c b/source/blender/makesrna/intern/rna_depsgraph.c
index b42422be640..923ad24cc1b 100644
--- a/source/blender/makesrna/intern/rna_depsgraph.c
+++ b/source/blender/makesrna/intern/rna_depsgraph.c
@@ -677,7 +677,7 @@ static void rna_def_depsgraph(BlenderRNA *brna)
   PropertyRNA *parm;
   PropertyRNA *prop;
 
-  static EnumPropertyItem enum_depsgraph_mode_items[] = {
+  static const EnumPropertyItem enum_depsgraph_mode_items[] = {
       {DAG_EVAL_VIEWPORT, "VIEWPORT", 0, "Viewport", "Viewport non-rendered mode"},
       {DAG_EVAL_RENDER, "RENDER", 0, "Render", "Render"},
       {0, NULL, 0, NULL, NULL},
diff --git a/source/blender/makesrna/intern/rna_light.c b/source/blender/makesrna/intern/rna_light.c
index 6b4ab2e64b4..83068acb23c 100644
--- a/source/blender/makesrna/intern/rna_light.c
+++ b/source/blender/makesrna/intern/rna_light.c
@@ -107,7 +107,7 @@ static void rna_def_light(BlenderRNA *brna)
 {
   StructRNA *srna;
   PropertyRNA *prop;
-  static float default_color[4] = {1.0f, 1.0f, 1.0f, 1.0f};
+  static const float default_color[4] = {1.0f, 1.0f, 1.0f, 1.0f};
 
   srna = RNA_def_struct(brna, "Light", "ID");
   RNA_def_struct_sdna(srna, "Light");
diff --git a/source/blender/python/intern/bpy_msgbus.c b/source/blender/python/intern/bpy_msgbus.c
index af724b8f618..ef1bf3c5ac2 100644
--- a/source/blender/python/intern/bpy_msgbus.c
+++ b/source/blender/python/intern/bpy_msgbus.c
@@ -224,7 +224,7 @@ static PyObject *bpy_msgbus_subscribe_rna(PyObject *UNUSED(self), PyObject *args
     IS_PERSISTENT = (1 << 0),
   };
   PyObject *py_options = NULL;
-  EnumPropertyItem py_options_enum[] = {
+  const EnumPropertyItem py_options_enum[] = {
       {IS_PERSISTENT, "PERSISTENT", 0, ""},
       {0, NULL, 0, NULL, NULL},
   };
diff --git a/source/blender/render/intern/texture_image.c b/source/blender/render/intern/texture_image.c
index 9807a45ae4e..5d69bbe1d37 100644
--- a/source/blender/render/intern/texture_image.c
+++ b/source/blender/render/intern/texture_image.c
@@ -407,7 +407,7 @@ static void clipy_rctf_swap(rctf *stack, short *count, float y1, float y2)
   }
 }
 
-static float square_rctf(rctf *rf)
+static float square_rctf(const rctf *rf)
 {
   float x, y;
 
@@ -461,7 +461,7 @@ static float clipy_rctf(rctf *rf, float y1, float y2)
   return 1.0;
 }
 
-static void boxsampleclip(ImBuf *ibuf, rctf *rf, TexResult *texres)
+static void boxsampleclip(ImBuf *ibuf, const rctf *rf, TexResult *texres)
 {
   /* Sample box, is clipped already, and minx etc. have been set at ibuf size.
    * Enlarge with anti-aliased edges of the pixels. */
@@ -881,8 +881,13 @@ static void feline_eval(TexResult *texr, ImBuf *ibuf, float fx, float fy, afdata
 }
 #undef EWA_MAXIDX
 
-static void alpha_clip_aniso(
-    ImBuf *ibuf, float minx, float miny, float maxx, float maxy, int extflag, TexResult *texres)
+static void alpha_clip_aniso(const ImBuf *ibuf,
+                             float minx,
+                             float miny,
+                             float maxx,
+                             float maxy,
+                             int extflag,
+                             TexResult *texres)
 {
   float alphaclip;
   rctf rf;