diff --git a/system/nvidia-open-kernel/nvidia-open-kernel.SlackBuild b/system/nvidia-open-kernel/nvidia-open-kernel.SlackBuild
index b637e1bd18..81cf9e0813 100644
--- a/system/nvidia-open-kernel/nvidia-open-kernel.SlackBuild
+++ b/system/nvidia-open-kernel/nvidia-open-kernel.SlackBuild
@@ -28,7 +28,7 @@ cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=nvidia-open-kernel
 VERSION=${VERSION:-535.154.05}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
@@ -83,6 +83,9 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+# Patch for latest 6.x kernels:
+patch -p1 < $CWD/nvidia-open-rcu_read_lock-unlock.patch
+
 # CC=${CC:-gcc} suppresses an otherwise harmless "compiler mismatch"
 # message.  If you custom-build your kernel with clang,
 # then pass CC=clang to this script.
diff --git a/system/nvidia-open-kernel/nvidia-open-rcu_read_lock-unlock.patch b/system/nvidia-open-kernel/nvidia-open-rcu_read_lock-unlock.patch
new file mode 100644
index 0000000000..a64f415e4f
--- /dev/null
+++ b/system/nvidia-open-kernel/nvidia-open-rcu_read_lock-unlock.patch
@@ -0,0 +1,45 @@
+--- a/kernel-open/common/inc/nv-linux.h
++++ b/kernel-open/common/inc/nv-linux.h
+@@ -1990,2 +1990,23 @@
+ 
++#if defined(CONFIG_HAVE_ARCH_PFN_VALID) || LINUX_VERSION_CODE < KERNEL_VERSION(6,1,76)
++#  define nv_pfn_valid pfn_valid
++#else
++/* pre-6.1.76 kernel pfn_valid version without GPL rcu_read_lock/unlock() */
++static inline int nv_pfn_valid(unsigned long pfn)
++{
++        struct mem_section *ms;
++
++        if (PHYS_PFN(PFN_PHYS(pfn)) != pfn)
++                return 0;
++
++        if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)
++                return 0;
++
++        ms = __pfn_to_section(pfn);
++        if (!valid_section(ms))
++                return 0;
++
++        return early_section(ms) || pfn_section_valid(ms, pfn);
++}
++#endif
+ #endif  /* _NV_LINUX_H_ */
+--- a/kernel-open/nvidia/nv-mmap.c
++++ b/kernel-open/nvidia/nv-mmap.c
+@@ -576,3 +576,3 @@
+             if (!IS_REG_OFFSET(nv, access_start, access_len) &&
+-                (pfn_valid(PFN_DOWN(mmap_start))))
++                (nv_pfn_valid(PFN_DOWN(mmap_start))))
+             {
+--- a/kernel-open/nvidia/os-mlock.c
++++ b/kernel-open/nvidia/os-mlock.c
+@@ -102,3 +102,3 @@
+         if ((nv_follow_pfn(vma, (start + (i * PAGE_SIZE)), &pfn) < 0) ||
+-            (!pfn_valid(pfn)))
++            (!nv_pfn_valid(pfn)))
+         {
+@@ -176,3 +176,3 @@
+ 
+-    if (pfn_valid(pfn))
++    if (nv_pfn_valid(pfn))
+     {