Import initial kernel 5.12 compat patch, based on Joan Bruguera's b21e792dc0/nvidia-fix-linux-5.12.patch

PKGBUILD

@@ -215,7 +215,7 @@ fi
 
 pkgname=("${_pkgname_array[@]}")
 pkgver=$_driver_version
-pkgrel=154
+pkgrel=155
 arch=('x86_64')
 url="http://www.nvidia.com/"
 license=('custom:NVIDIA')
@@ -268,6 +268,7 @@ source=($_source_name
         'kernel-5.11.patch' # 5.11 workaround
         '5.11-legacy.diff' # 5.11 additional workaround (<460.32.03)
         '455-crashfix.diff' # 455 drivers fix - https://forums.developer.nvidia.com/t/455-23-04-page-allocation-failure-in-kernel-module-at-random-points/155250/79
+        'kernel-5.12.patch' # 5.12 workaround
 )
 
 msg2 "Selected driver integrity check behavior (md5sum or SKIP): $_md5sum" # If the driver is "known", return md5sum. If it isn't, return SKIP
@@ -300,7 +301,8 @@ md5sums=("$_md5sum"
          'bcdd512edad1bad8331a8872259d2581'
          'fd0d6e14e675a61f32279558678cfc36'
          '8764cc714e61363cc8f818315957ad17'
-         '08bec554de265ce5fdcfdbd55fb608fc')
+         '08bec554de265ce5fdcfdbd55fb608fc'
+         '539fef68f4466c4d8cce40bb2fe0e7d9')
 
 if [ "$_autoaddpatch" = "true" ]; then
   # Auto-add *.patch files from $startdir to source=()
@@ -575,6 +577,12 @@ DEST_MODULE_LOCATION[3]="/kernel/drivers/video"' dkms.conf
       fi
     fi
 
+    # 5.12
+    if (( $(vercmp "$_kernel" "5.12") >= 0 )); then
+      _kernel512="1"
+      _whitelist512=( 455.50* 460.* )
+    fi
+
     # Loop patches (linux-4.15.patch, lol.patch, ...)
     for _p in $(printf -- '%s\n' ${source[@]} | grep .patch); do  # https://stackoverflow.com/a/21058239/1821548
       # Patch version (4.15, "", ...)
@@ -625,6 +633,9 @@ DEST_MODULE_LOCATION[3]="/kernel/drivers/video"' dkms.conf
       if [ "$_patch" = "5.11" ]; then
         _whitelist=(${_whitelist511[@]})
       fi
+      if [ "$_patch" = "5.12" ]; then
+        _whitelist=(${_whitelist512[@]})
+      fi
 
       patchy=0
       if (( $(vercmp "$_kernel" "$_patch") >= 0 )); then
@@ -897,6 +908,20 @@ DEST_MODULE_LOCATION[3]="/kernel/drivers/video"' dkms.conf
       fi
     fi
 
+    # 5.12
+    if [ "$_kernel512" = "1" ]; then
+      patchy=0
+      for yup in "${_whitelist512[@]}"; do
+        [[ $pkgver = $yup ]] && patchy=1
+      done
+      if [ "$patchy" = "1" ]; then
+        msg2 "Applying kernel-5.12.patch for dkms..."
+        patch -Np1 -i "$srcdir"/kernel-5.12.patch
+      else
+        msg2 "Skipping kernel-5.12.patch as it doesn't apply to this driver version..."
+      fi
+    fi
+
     # Legacy quirks
     if [ "$_oldstuff" = "1" ]; then
       msg2 "Applying 01-ipmi-vm.diff for dkms..."

patches/kernel-5.12.patch

@@ -0,0 +1,30 @@
+diff --git a/kernel-dkms/nvidia-drm/nvidia-drm-drv.c b/kernel-dkms/nvidia-drm/nvidia-drm-drv.c
+index 9582531..c23a338 100644
+--- a/kernel-dkms/nvidia-drm/nvidia-drm-drv.c
++++ b/kernel-dkms/nvidia-drm/nvidia-drm-drv.c
+@@ -796,6 +797,13 @@ static struct drm_driver nv_drm_driver = {
+ #endif
+ };
+ 
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0))
++// Reimport trivial forwarder function deleted in commit "drm: Don't export the drm_gem_dumb_destroy() function" (file drivers/gpu/drm/drm_gem.c)
++static int nv_drm_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev, u32 handle)
++{
++    return drm_gem_handle_delete(file, handle);
++}
++#endif
+ 
+ /*
+  * Update the global nv_drm_driver for the intended features.
+@@ -819,7 +827,11 @@ static void nv_drm_update_drm_driver_features(void)
+ 
+     nv_drm_driver.dumb_create      = nv_drm_dumb_create;
+     nv_drm_driver.dumb_map_offset  = nv_drm_dumb_map_offset;
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 12, 0))
+     nv_drm_driver.dumb_destroy     = drm_gem_dumb_destroy;
++#else
++    nv_drm_driver.dumb_destroy     = nv_drm_gem_dumb_destroy;
++#endif
+ #endif /* NV_DRM_ATOMIC_MODESET_AVAILABLE */
+ }
+