util: Move pb_slab from gallium to util

That will be used outside of gallium drivers in the next commit, so
moving it out to util folder.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33558>

src/gallium/auxiliary/meson.build

@@ -118,8 +118,6 @@ files_libgallium = files(
   'pipebuffer/pb_bufmgr_slab.c',
   'pipebuffer/pb_cache.c',
   'pipebuffer/pb_cache.h',
-  'pipebuffer/pb_slab.c',
-  'pipebuffer/pb_slab.h',
   'pipebuffer/pb_validate.c',
   'pipebuffer/pb_validate.h',
   'postprocess/filters.h',

src/gallium/drivers/iris/iris_bufmgr.h

@@ -38,7 +38,7 @@
 #include "util/list.h"
 #include "util/simple_mtx.h"
 #include "pipe/p_defines.h"
-#include "pipebuffer/pb_slab.h"
+#include "util/pb_slab.h"
 #include "intel/dev/intel_device_info.h"
 
 struct intel_device_info;

src/gallium/drivers/zink/zink_types.h

@@ -37,7 +37,7 @@
 #include "pipe/p_state.h"
 
 #include "pipebuffer/pb_cache.h"
-#include "pipebuffer/pb_slab.h"
+#include "util/pb_slab.h"
 
 #include "util/blob.h"
 #include "util/disk_cache.h"

src/gallium/winsys/amdgpu/drm/amdgpu_bo.h

@@ -10,7 +10,7 @@
 #define AMDGPU_BO_H
 
 #include "amdgpu_winsys.h"
-#include "pipebuffer/pb_slab.h"
+#include "util/pb_slab.h"
 
 #ifdef __cplusplus
 extern "C" {

src/gallium/winsys/amdgpu/drm/amdgpu_winsys.h

@@ -9,7 +9,7 @@
 #define AMDGPU_WINSYS_H
 
 #include "pipebuffer/pb_cache.h"
-#include "pipebuffer/pb_slab.h"
+#include "util/pb_slab.h"
 #include "winsys/radeon_winsys.h"
 #include "util/simple_mtx.h"
 #include "util/u_queue.h"

src/gallium/winsys/radeon/drm/radeon_drm_bo.h

@@ -10,7 +10,7 @@
 
 #include "radeon_drm_winsys.h"
 #include "util/u_thread.h"
-#include "pipebuffer/pb_slab.h"
+#include "util/pb_slab.h"
 
 struct radeon_bo {
    struct pb_buffer_lean base;

src/gallium/winsys/radeon/drm/radeon_drm_winsys.h

@@ -9,7 +9,7 @@
 
 #include "winsys/radeon_winsys.h"
 #include "pipebuffer/pb_cache.h"
-#include "pipebuffer/pb_slab.h"
+#include "util/pb_slab.h"
 #include "util/u_queue.h"
 #include "util/list.h"
 #include "drm-uapi/radeon_drm.h"

src/util/meson.build

@@ -80,6 +80,8 @@ files_mesa_util = files(
   'os_misc.h',
   'os_socket.c',
   'os_socket.h',
+  'pb_slab.c',
+  'pb_slab.h',
   'ptralloc.h',
   'perf/u_trace.h',
   'perf/u_trace.c',